To learn electronics in a very different and effective way, and gain access to Mr Carlson's personal designs and inventions, visit the Mr Carlson's Lab Patreon page here: www.patreon.com/MrCarlsonsLab
Hey Mr Carlson, the 4K video is great, the 60P not so much, especially with slow-moving or mostly stationary scenes. 60fps is good for catching motion, but completely unnecessary and a waste of bandwidth for the type of content you produce. What’s worse, it may prevent those who would be able to watch 4K 30P from enjoying your show in 4K. For example, even my late model premium TV struggles to play back 4K 60P. Just thought you might like to know and adjust accordingly. C-ya!
You saved the life of thousands of terminal strips and tube sockets with your unsoldering technique alone. Worth the price of admission all by itself. Thanks.
Paul, I don't know if you ever taught electronics to groups professionally, but I am always interested in your videos for this very reason. Your ability to explain not only the detail of how to do these repairs, but also the philosophy behind them and still make it all interesting shows me your teaching skills are outstanding. Looking forward to the next video.
Second that comment. I found this channel just trying to learn board level repairs for game consoles, but I've keep coming back because the videos and explanations are fascinating!
Loved how you went over the schematic with so much detail, every little random "what's that for?" resistor and capacitor. Thank you for making these fantastic detailed videos.
In my 40 years plus of electronics repair I never knew those caps were oil filled. Well I’ll be dang. Enjoyed this episode. I’m with you on component lead placement and soldering.
The beauty of these TH-cam channels are the different disciplines we find and adhere to. Sometimes these same disciplines are drilled into us as we learn by others and too through experience. I tend to give a broad brush of grace to other's and their way of doing things...so in turn I learn some new everyday..... Also...when it comes to Restorations: I realize that some seem to focus on cost and keep an original part if it's within tolerance, and sometimes it's perfectly acceptable to do so. But I prefer to prioritize (as in seeing) the future of the set, meaning unless it's detrimental to change a component I do not hesitate and replace everything. Why? Because it may be another 50 years before that 100 year old cap/ resistor / tube or wire is then replaced. Just my opinion humbly submitted. As always great video and series Paul. Thanks & look forward to the next.
Wonderful episode Paul....kinda of a master class on electronics....you do know this stuff inside out. Very excited to see part3.... Thanks again for all this knowledge. It is priceless! Cheers!
I just restored the glass panels of my digital dash cluster from my car and was thinking of how time consuming it would be to video and explain all the procedures. All my respect to how good you do it. By the way, I appreciate the rare look at under Chassi antique dust.
@@matthiasmartin1975 that was some cool stuff. I liked that ford used vfd dot matrix screens in their dash information centers till like 08 or so... I think the heavy duty commercial vehicles used it even a few years ago, I remember seeing it in a 19 model RV. but I think it has to be gone now.
You and "Mikrowave1" are my favorite You-Tube creators. I love the way you do your presentations and every time I watch your videos I learn something. Thank you!
Awesome walk through on the schematic. Anyone with basic electronic skills can follow you as we "look over your shoulder". You explain things so well! Looking forward to part 3.
I've missed your long restoration videos! I appreciate all of your hard work you've put into your lab and equipment so we can enjoy these videos!. Tip for the day I've learned is to use string and go behind the knobs and wrap string around the 1/4 inch shaft to pull the knobs off. It puts all the tension on the center. Best regards!
Your tip on not necessarily 'hooking' wires to terminals - priceless. I have been doing it (guilt-stricken) for just a year or so. Now I have a blessing! Thanks!!
Hi Paul. I just watched the latest episode with my lab buddy, Westinghouse. We were taking a break from restoring our 1935 Philco Model 60. This is great stuff. You do a lot of hard work producing these videos, and I'm grateful. Can't wait for the next installment.
Your videos are awesome and the in-depth explanations are the best. Your channel by far is the best around for learning electronics and restoration. Seeing these great classics brought back to life is truly amazing! Keep up the awesome work and look forward to more great videos from the lab!
Will you fuse the 120 VAC input line? It could easily be hidden inside. Great work. You're a wizard at explaining the role of individual components in the schematic. Thanks for the great learning experience.
I’m here before I can actually watch the video because I checked the playlist. It showed a deleted video, and I was curious to investigate! It says that the video is still processing. I can hardly contain my excitement! Update: I’m here, the video is here, but it is still unlisted. I don’t know how I’ve made it here before the patreon plug. I’m not going to watch it at this moment, because the video is literally 5fps 144p. Update II: 360p is now available. I will watch the video, however the video is only 30fps. I’m willing to settle for this, because I’m tremendously excited!
The video work is so nice on these. It is no picnic getting that just right, and not so easy doing the rest of the editing/uploading etc....... Just want you to know I notice how good your production work is too.
Thanks Leonard! This video took TH-cam 12 Hours to produce. The video size was 71.1G (Gigs.) I may go back to 1080P as the the processing time is "WAY" to slow (at TH-cam.) This video could have been up at 10AM this morning in 1080P. Compressing the 4K file is possible before upload, but then what's the point if I'm going to reduce it's playback quality.... Then TH-cam compresses it further after I compress it. Looking like 1080P again.
@@MrCarlsonsLab I ran into a similar thing even with 1080P last time. 2 different processing times Low Res/High Res. I haven't tried the 4K. But that is excessive, 12 hours is brutal. I have always found your videos to be very easy to watch and enough definition to see the important stuff fine. Not only that it seems that I find one little thing I was unaware of in each of them.
@@MrCarlsonsLab I believe its worth it. The time youtube spends encoding 4K is not wasted I assure you. The clarity is great. It also is NOT just for the minority of users with 4k displays. Thanks to downscaling and the higher bitrate setting the picture to 4K on a standard FHD display graces us with "better 1080p" for lack of a better word. Of course if it takes too much time off your schedule maybe it's better to stay on FHD but as far as we as concerned; I believe we are a quite patient audience so a day or 2 of extra wait is not going to be then end of the world.
Hi Paul. I know now why I have noticed, but avoided watching any of your videos. I'm probly gonna have to go & watch all of them now! I'm so far behind reading all the comments, & all the replies to the comments, & replying to a few comments, that if I parrot what's already been said try to bear with me ok! Congrats mate on a fantastic video! Your clear explanation of the various circuit blocks & signal paths & interactions, components & their characteristics, performance, load & fault symptoms, as well as the repair itself, well geez, what else would I need to sit back & be thoroughly entertained for a while, besides that radio when you've finished fixin her up? I have a sparky mate who I can talk to about this electrickery stuff to some extent, but everyone else around me, well, eyes glaze over & heads nod & smile...you know. But here finally there's someone to talk to, so youse are probly stuck with me now. I had a real nice big old bakelite cabinet Astor valve radio I had been kinda restoring (over the last 40 years) that got cremated in the bushfires here a year or 2 ago. I had been replacing all the rubber insulated single strand wiring in it with aircraft teflon/fibreglass tinned wire. The rubber insulation had turned into clay, & my girlfriend's dad complained that he had to smack it round the ear sometimes to stop the crackling noise, so I grabbed it away from him quick smart in the interests of safety. It's like you just look at the wiring & a bit of insulation would fall off somewhere! I had not long previously acquired some of this super dooper wire from a friend, so I thought - "what better use for it than to really fix up that radio!" Yeah it was real good wire but the worst, most difficult I'd ever had to work with! Trying to get that insulation off? I could strip 5 wires per stanley blade or something stupid like that. Aircraft grade, more like spacecraft grade! So I'd been replacing electros, valves & resistors bit by bit & I was gonna polish up the nice 2 tone bakelite cabinet, but not any more. Being a technician before a musician, my brand new faulty valve guitar amp was soon in pieces. Apparently a Chinese made copy of a 15 watt Epiphone amp. I also got a copy of a Gibson Les Paul guitar, both for $1k, so hopefully they're pretty good. My oldest son was the drummer in a metal band at the time & I spose I got the bug during my 'midlife crisis'. I chose the guitar cos it looked the best! I had no idea how to play but just fell in love with the look of this guitar! All the pearl & different-coloured inlays, gold plated string adjusters! A thing of beauty just to look at! So yeah I'm fixing & modding my amp, which will be fun!
Didn't surprise me that just about all resistors & caps needed replacing. Never seen a leaking cap like that. Yikes! Love that trim trick. Remember dad doing that. Love your channel. Ready for part 3 of this beautiful receiver.
All of those oil caps will likely be replaced. There are not really that many in the chassis anyway. As for the type? There are companies such as Mod Electronics that still make oil-filled caps. But they come at a premium price. Generally, those old oil capacitors are replaced with poly caps.
Paul, I think my wife is mad at you . I have always been an electronics tinkerer as my father was a TV tech in t early 60's and in the 5 years he had, he ingrained a luv of all things technical. After watching some of your videos I had to make room for another hobby in restoring old radios, building the test equipment yo come up with and even a couple scopes. One for my curve tracer and one for fun. Don't worry, she can't get to you now ye are in Ontario. As long as we don't move back to Alberta.😁 Keep up the great work, and hopefully we all can save more of these gems from the landfills and get the enjoyment from them again.
Paul you have spent year studying many electric currents and tube uses. I here you talk so clearly and enjoyable lyrics voice. I am going to find a school to attend to build a great audio tube amp
Paul you're still the best on You tube. Glad you explain in detail some of the reasons why things were designed as they were back then..... Learn the most from you and most professional on You tube. Can't thank you enough made my day. 73s Mike wb7qxu
Thanks Paul for the focus on the technical know-how, as well as the testing. push pull and phasing used to be a bit of a mystery to me but I am getting the hang of it thanks to specialists like yourself. Can't wait for the next video.
Excellent explanation of the schematics and the design intent of all the components . I took some electronics courses over 30 years ago. Also took industrial electronics, PLC, and Robotics courses back then. I was also an industiral repariman BEFORE I started designing semi-automatic machines and product test equipment . I left that behind back in 2000. I moved into product design in various industries. Now I design plastic injection related products. Did delve into some data destruction machines in 2014. Later Aircraft Evacuation Slides. Also did some work on Blood Counting Machines in 2015. I like the variety in my design career. But I always have loved the "magic" of discrete electronics.
Your measured, methodical vocal cadence is inspiring. So many of us talk fast and say little (Elon being exception), or speak in confusing twists and turns, whereas your speech seems metaphorical of the scientific method.
Fantastic as usual, Paul. So, one thing I'll add to the wrapped component thing is beware of "order of ops" on some of those. When multiples are sharing the same eyelet and they're wrapped, it can be a real pain to figure out which one needs to go first or if they're knotted together; especially if they're completely hidden behind a massive wad of solder on the terminal and there's no visible ears to trim haha. Fun sentence. Anyway a helpful trick is heat and wiggle the parts around to force a cold joint to form and thereby make it a little easier to get them out the last bit.
Hey Paul like you desoldering tip regarding your “Favorite Pilers”. That is a GREAT idea !! We were all thought to make that mechanical connection before soldering. Here’s one for you that I like, I use various size forceps, they too have ridges for gripping but they lock and can work as a 3rd hand because of their weight(if you use large enough one) and you can let them go the weight will with the soldering iron will do the work if you need a 3rd hand. Even if you do not need a 3rd hand I find because forceps lock and come in various sizes and shapes(some come with a curved radius) for me they work better. They are also much finer for chassis that are very busy with components you can get in there much easier. I am frequently using forceps. Though you’d enjoy another perspective. Ricky from IBM, Ret Englewood Florida
Hi Paul Thanks for an excellent series, really informative from someone who knows their craft. In case anyone thinks you're OTT with you oil warnings... A number of years ago in Ireland dioxins that had been banned for decades started to turn up during random sampling of bacon products. It turned out that old transformer oil had been recycled and mixed in with modern o il which was used to dry grain. This grain was then fed to pigs and the dioxins in the transformer oil having contaminated the grain then contaminated the meat.
Dioxins? Omg they're one of the most toxic chemicals around! I think some components may have used polychlorinated biphenyls (pcb's!), which are also dreadfully bad for us.
Hi, great channel. Your pronunciation of chassis makes me smile. I'm from the UK. It's shassey, not chassey lol. Love your attention to detail with describing things, other presenters assume you already know. Thanks.
You are a top notch teacher, I especially love how you guide us through the schematics. I'm learning a lot and hooked on these excellent presentations. 👍. N5KY
I could be wrong but that appears to be a cathodyne phase inverter due to the plate of the second triode is feeding one of the outputs and the cathode is feeding the other. Nice old radio. Anxious to see the final results. Great vid, Thanks Paul.
another banger episode mr C. im coincidentally trying to learn about RF interference with audio amps (translation: my guitar pickup hears too much wiggles from the ether) and this is right on topic. unfortunately i fell asleep because you're so calming. its morning now & I dont remember what you said, but hopefully i learned by hypnotism during my sleep. will watch again tonight. cheers mate.
Wow, this is a description beyond descriptions. Great job. I actually took pictures with one phone and made notes for my reference manual. The use of snubber capacitors in the output circuit as well as the addition of 1K stopper resistors in the grid path of the 6v6s. One thing I have always wondered about is why a capacitor is placed across the output transformer of a single tube amplifier? You're point by point description of the entire circuit makes the video! Thanks
Awesome! You use the same small flexible LED lamp I use on my bench. I have a pair of them actually but one of them is starting to flicker a bit. I've not a found a replacement style LED lamp as yet but they are awesome for bench use.
The problem is usually the switch, also check the connection on the power supply. Spray some contact cleaner in the switch and cycle it a bunch of times. This fixes my lamps all the time. I think the weak spots are the connections.
Very informative and well done!👍😀 Looking forward to the next video. Thanks again for the time you dedicate to produce these videos. Very much appreciated!!👌🙂👏
My goodness I LOVE your videos! I always learn so much. Even when others may see something as mundane I see it as a new thing. Such is the excitement of a newbie. A 63 yr old newbie. LOL s I mentioned in a separate message I am self taught. I had no one to learn from so I just started reading. I know just enough to be dangerous. Hahahahaha. I would like to throw down a gauntlet, so to speak. I must admit it is in my wheelhouse of WW 2 radios. I would like to see you restore a WW 2 BC-611. This is a historic radio as it is the very first walkie-talkie. Back then they called it the "Handy-talkie". Should be a piece of cake. LOL not.
I do a lot of work repairing or building audio amps. Your a correct when you say that all grounding in the PSU so be a a central point, ? We call it a star earthing (grounding) . On solid state amps you should also take the speakers ground to this point as well . A good video . I like you videos because you explain why things are done
Aren't most modern audio amplifiers differential input and output? TI and NXP seem to be that way, the only new amplifier I have that's single ended is an Infineon IRS2092.
I have a AR88 inside the bfo can which looks like one of the IF transformers is stuffed the caps and resistors it is working but then took it apart and found the resistors had gone out of spec due to the heat I recon. Replaced all the parts and the output improved. Quite a job to get to the parts. I thought I would mention this in case you start looking for the res and caps on the restoration.
I love that HP meter! The Nixie display looks fabulous on-camera. Picked up a 3440A (wtih the +- tube!) and with just a good cleaning, it works great. The design was pretty innovative for the time, and is still plenty accurate for general use today. I had hoped to make a video about it, but maybe I'll just wait and learn something from yours instead...
Hi Paul, the Benton Harbor boys taught me how to solder via their really well done instruction manuals. And, they always said to make sure you had a strong physical connection before you soldered. I always thought it was overkill, but hey, what did I know back then. Not much.
these kinds of learning videos are soo relaxing... i wonder how they get the color rings on resistors and caps are so perfect? lots of factory machines to make a kool tube radio. 😍 thanks
Another awesome video! You always have interesting commentary. Thanks Paul! Regarding hooked solder joints, I’d argue that the hooks were done in support of mass production. I suspect that, in the assembly line, some people would install components and others would do the soldering further down the assembly line. Because of that process, component ends would need to be hooked in order to keep the components in place till soldering could be done.
fb I'm sure you're correct. It takes more time to bend component leads around terminals than to just poke them through the appropriate hole in a tagstrip, so why would the manufacturer do that if they didn't have to?
@@nevillegoddard4966 On an assembly line, every person focuses on a very specific task. One person might install nothing but specific types of resistors on a one area of the radio chassis. Another person might only install capacitors. A third person might only install IF transformers. Etc, etc. If a person does nothing but install resistors, for example, that person will become highly adept and very fast at that task, and that person will only need specific resistors, and a small set of tools specific to their task. Then, another person does nothing but soldering, that person will become really efficient at soldering, and will only need tools/supplies specific to soldering. On the other hand, if every person who installs components also needs to solder those components, all those people will also need soldering tools/supplies, which is much more costly for the company. Plus, those people will have many more tasks to complete, which will slow down their progress. Focusing on a single task a couple very similar tasks speeds up production, minimizes mistakes, and saves money by minimizing the number of tools required on an assembly line. To us, it may seem slow to wrap component ends to terminals, but a person who does nothing else will be able to do it much faster than we can imagine. On such an assembly line, wrapping component ends to terminals would be required to keep those components in place till someone else further down the assembly line is able to solder those components. Back then, it was all about building radios or whatever product as fast as possible with the least amount of cost. Look at any assembly line, and you'll see every person doing very specific tasks, and they are extremely efficient at their assigned tasks. In fact, if you google "1940s radio assembly line", you will see some impressively large assembly lines, which also show how limited each person's tasks were. They're really neat photos to look at. Cheers!
That looks like 👍 a very sophisticated radio 📻. I REALLY like 👍 it. That’s when radios 📻 were REAL. I saw 👀, and have to watch part 1 of this. That dial looks almost like 👍 the instrumentation 🎷in an airplane ✈️. I’m so glad 🙂 that you’re restoring it. Even the color of that case goes with any decor perfectly 😍. Please keep these GREAT 😊 radio 📻 videos coming. Your friend, Jeff.
9:30 thanks for the explanation on why these types of caps should not be left in circuit, I may have to show this section to the musicians who come into my shop with a amp and a bag of old failed caps and want me to replace them
I am astounded that you’re able to acquire the wiring diagrams on these older systems. May I ask where you find them? Is there an aftermarket database that repair individuals like yourself use? I’m involved in automotive repair and I typically use the OEM service data but I was curious how you find these diagrams where the manufacturer hasn’t been in business for decades. I find every one of your videos extraordinary!
This was pretty obviously the high-end of GE's receiver line, so not too surprising that the schematics are still available. I also wonder where he gets such clean schematics - a lot of the ones I run across are barely-legible scans.
@@drtidrow Hi Ray there are are groups & clubs (& I think a business or 2) that specifically exist to collect, collate & save old manuals & circuits. Some old units even had the circuit diagram stuck to the inside of their cabinets.
I had heard that the reason components were hooked around securely on terminal strips in the past was because of the assembly line. Several people installed components as the chassis went down the line. Then a solder team would do the task of soldering afterward. The hook-over prevented components from falling out of position.
Any chance when you do take out the old capacitors and the bad resistors (please leave the good ones in, even if there are only a couple!), you could do a simple single-shot time lapse and post that? I think it would be interesting to see all that work being performed, even if at warp speed. Love the videos. Thanks.
A couple of leads on resistors and caps on the upper right side of the amp seem to be a bit hairy with short fiber-looking structures. Is that dust or "tin pest" on the tinned leads?
Nice project I have restored a lot of older radios always remember to slowly introduce the voltage to the old tubes with a variable voltage supply to keep them from popping. The sound quality is awesome and some tubes are so hard to get but I have a room full of tubes if you need any tubes let me know the number of the tube. Take care
Nice! A resistor network, carefully tweaked, to match the two half waves driving the push-pull power amplifier output stage. Tried this on a Transistor version applying a similar principle in a 1 room single-bed workshop during the late 70s, the only cellar room in the house the parents had deemed safe when set on fire at the time. Unfortunately, the project was abandoned because this one was soon running out of BD 138 paired transistors while tweaking the pots that had made up the above network.😮💨
![A Restoration Adventure - [ GE Radio Receiver Restoration Series ]](http://i.ytimg.com/vi/5y0RqivTy4Q/mqdefault.jpg)
To learn electronics in a very different and effective way, and gain access to Mr Carlson's personal designs and inventions, visit the Mr Carlson's Lab Patreon page here: www.patreon.com/MrCarlsonsLab
Me and my cousin are going to a Swap meet June 5th 2022 Sunday morning at 8 am in Milwaukee
Other hobbys lisining to records CDs and fmstreo on my Yamaha reciver
Where the link to download the pdf.
Hey Mr Carlson, the 4K video is great, the 60P not so much, especially with slow-moving or mostly stationary scenes. 60fps is good for catching motion, but completely unnecessary and a waste of bandwidth for the type of content you produce. What’s worse, it may prevent those who would be able to watch 4K 30P from enjoying your show in 4K. For example, even my late model premium TV struggles to play back 4K 60P. Just thought you might like to know and adjust accordingly. C-ya!
@@greggaieck4808 se ne mogu olakšati posao je brat ja vas pitam da je brat je ljubav t
You saved the life of thousands of terminal strips and tube sockets with your unsoldering technique alone. Worth the price of admission all by itself. Thanks.
Paul, I don't know if you ever taught electronics to groups professionally, but I am always interested in your videos for this very reason. Your ability to explain not only the detail of how to do these repairs, but also the philosophy behind them and still make it all interesting shows me your teaching skills are outstanding. Looking forward to the next video.
Second that comment. I found this channel just trying to learn board level repairs for game consoles, but I've keep coming back because the videos and explanations are fascinating!
I don't know the first thing about "Electronic Component's". But Mr. Calson's Lab is my favorite YT Channel.
Loved how you went over the schematic with so much detail, every little random "what's that for?" resistor and capacitor. Thank you for making these fantastic detailed videos.
You are welcome!
work in aviation electronics for 34yr,,this brings back memories l enjoy you videos you know your stuff.
In my 40 years plus of electronics repair I never knew those caps were oil filled. Well I’ll be dang. Enjoyed this episode. I’m with you on component lead placement and soldering.
The beauty of these TH-cam channels are the different disciplines we find and adhere to. Sometimes these same disciplines are drilled into us as we learn by others and too through experience. I tend to give a broad brush of grace to other's and their way of doing things...so in turn I learn some new everyday.....
Also...when it comes to Restorations: I realize that some seem to focus on cost and keep an original part if it's within tolerance, and sometimes it's perfectly acceptable to do so. But I prefer to prioritize (as in seeing) the future of the set, meaning unless it's detrimental to change a component I do not hesitate and replace everything. Why? Because it may be another 50 years before that 100 year old cap/ resistor / tube or wire is then replaced. Just my opinion humbly submitted.
As always great video and series Paul. Thanks & look forward to the next.
Wonderful episode Paul....kinda of a master class on electronics....you do know this stuff inside out. Very excited to see part3.... Thanks again for all this knowledge. It is priceless! Cheers!
I just restored the glass panels of my digital dash cluster from my car and was thinking of how time consuming it would be to video and explain all the procedures. All my respect to how good you do it. By the way, I appreciate the rare look at under Chassi antique dust.
Yay for 80s digital dashes! My parents had an 86 camry with that awesome multi color VFD display in it. Nothing ever looked as cool.
@@matthiasmartin1975 that was some cool stuff.
I liked that ford used vfd dot matrix screens in their dash information centers till like 08 or so... I think the heavy duty commercial vehicles used it even a few years ago, I remember seeing it in a 19 model RV. but I think it has to be gone now.
As someone that's done both, it takes about 10x as long...
You and "Mikrowave1" are my favorite You-Tube creators. I love the way you do your presentations and every time I watch your videos I learn something. Thank you!
Awesome walk through on the schematic. Anyone with basic electronic skills can follow you as we "look over your
shoulder". You explain things so well! Looking forward to part 3.
I've missed your long restoration videos! I appreciate all of your hard work you've put into your lab and equipment so we can enjoy these videos!. Tip for the day I've learned is to use string and go behind the knobs and wrap string around the 1/4 inch shaft to pull the knobs off. It puts all the tension on the center. Best regards!
Your tip on not necessarily 'hooking' wires to terminals - priceless. I have been doing it (guilt-stricken) for just a year or so. Now I have a blessing! Thanks!!
Even a Curious Marc shout out. Nice.
Dam that's a heavy duty well built receiver, I like that, Couldn't be in better hands, Mr. Carlson will have it working like new in no time.
Hi Paul. I just watched the latest episode with my lab buddy, Westinghouse. We were taking a break from restoring our 1935 Philco Model 60. This is great stuff. You do a lot of hard work producing these videos, and I'm grateful. Can't wait for the next installment.
Your videos are awesome and the in-depth explanations are the best. Your channel by far is the best around for learning electronics and restoration. Seeing these great classics brought back to life is truly amazing! Keep up the awesome work and look forward to more great videos from the lab!
Thanks for your kind feedback!
Will you fuse the 120 VAC input line? It could easily be hidden inside. Great work. You're a wizard at explaining the role of individual components in the schematic. Thanks for the great learning experience.
Seeing Paul shout out to Marc made my day. Keep up the awesome content guys.
I built one of your capacitor testers several years ago. It's one of my most-used tools. I love it!
Thanks for your kind feedback!
this is a great receiver. I would love to restore it myself. Thank you for saving all these receivers.
You are welcome!
I’m here before I can actually watch the video because I checked the playlist. It showed a deleted video, and I was curious to investigate! It says that the video is still processing.
I can hardly contain my excitement!
Update: I’m here, the video is here, but it is still unlisted. I don’t know how I’ve made it here before the patreon plug.
I’m not going to watch it at this moment, because the video is literally 5fps 144p.
Update II: 360p is now available. I will watch the video, however the video is only 30fps. I’m willing to settle for this, because I’m tremendously excited!
The video work is so nice on these. It is no picnic getting that just right, and not so easy doing the rest of the editing/uploading etc....... Just want you to know I notice how good your production work is too.
Thanks Leonard! This video took TH-cam 12 Hours to produce. The video size was 71.1G (Gigs.) I may go back to 1080P as the the processing time is "WAY" to slow (at TH-cam.) This video could have been up at 10AM this morning in 1080P. Compressing the 4K file is possible before upload, but then what's the point if I'm going to reduce it's playback quality.... Then TH-cam compresses it further after I compress it. Looking like 1080P again.
@@MrCarlsonsLab please stay with 4k, enjoying the crisp picture on the tv br from Sweden
@@MrCarlsonsLab I actually was waiting as the video uploaded, as I found the processing video in the playlist.
@@MrCarlsonsLab I ran into a similar thing even with 1080P last time. 2 different processing times Low Res/High Res. I haven't tried the 4K. But that is excessive, 12 hours is brutal. I have always found your videos to be very easy to watch and enough definition to see the important stuff fine. Not only that it seems that I find one little thing I was unaware of in each of them.
@@MrCarlsonsLab I believe its worth it. The time youtube spends encoding 4K is not wasted I assure you. The clarity is great. It also is NOT just for the minority of users with 4k displays. Thanks to downscaling and the higher bitrate setting the picture to 4K on a standard FHD display graces us with "better 1080p" for lack of a better word. Of course if it takes too much time off your schedule maybe it's better to stay on FHD but as far as we as concerned; I believe we are a quite patient audience so a day or 2 of extra wait is not going to be then end of the world.
Hi Paul. I know now why I have noticed, but avoided watching any of your videos. I'm probly gonna have to go & watch all of them now! I'm so far behind reading all the comments, & all the replies to the comments, & replying to a few comments, that if I parrot what's already been said try to bear with me ok!
Congrats mate on a fantastic video! Your clear explanation of the various circuit blocks & signal paths & interactions, components & their characteristics, performance, load & fault symptoms, as well as the repair itself, well geez, what else would I need to sit back & be thoroughly entertained for a while, besides that radio when you've finished fixin her up? I have a sparky mate who I can talk to about this electrickery stuff to some extent, but everyone else around me, well, eyes glaze over & heads nod & smile...you know. But here finally there's someone to talk to, so youse are probly stuck with me now.
I had a real nice big old bakelite cabinet Astor valve radio I had been kinda restoring (over the last 40 years) that got cremated in the bushfires here a year or 2 ago. I had been replacing all the rubber insulated single strand wiring in it with aircraft teflon/fibreglass tinned wire. The rubber insulation had turned into clay, & my girlfriend's dad complained that he had to smack it round the ear sometimes to stop the crackling noise, so I grabbed it away from him quick smart in the interests of safety. It's like you just look at the wiring & a bit of insulation would fall off somewhere! I had not long previously acquired some of this super dooper wire from a friend, so I thought - "what better use for it than to really fix up that radio!" Yeah it was real good wire but the worst, most difficult I'd ever had to work with! Trying to get that insulation off? I could strip 5 wires per stanley blade or something stupid like that. Aircraft grade, more like spacecraft grade!
So I'd been replacing electros, valves & resistors bit by bit & I was gonna polish up the nice 2 tone bakelite cabinet, but not any more.
Being a technician before a musician, my brand new faulty valve guitar amp was soon in pieces. Apparently a Chinese made copy of a 15 watt Epiphone amp. I also got a copy of a Gibson Les Paul guitar, both for $1k, so hopefully they're pretty good. My oldest son was the drummer in a metal band at the time & I spose I got the bug during my 'midlife crisis'. I chose the guitar cos it looked the best! I had no idea how to play but just fell in love with the look of this guitar! All the pearl & different-coloured inlays, gold plated string adjusters! A thing of beauty just to look at! So yeah I'm fixing & modding my amp, which will be fun!
Didn't surprise me that just about all resistors & caps needed replacing. Never seen a leaking cap like that. Yikes! Love that trim trick. Remember dad doing that. Love your channel. Ready for part 3 of this beautiful receiver.
thanks for embarking on this great series. love this radio. anxiously awaiting the portion addressing the r390.
You are one incredible teacher. Even though I have a fairly thorough understand of this stuff, I still really enjoy hearing you explain how it works.
I'm anxious to see the next part. I'm looking forward to seeing which caps were replaced and with what type.
All of those oil caps will likely be replaced. There are not really that many in the chassis anyway. As for the type? There are companies such as Mod Electronics that still make oil-filled caps. But they come at a premium price. Generally, those old oil capacitors are replaced with poly caps.
Inspiring, as always. The very best for you and your beloved!
Paul, I think my wife is mad at you . I have always been an electronics tinkerer as my father was a TV tech in t early 60's and in the 5 years he had, he ingrained a luv of all things technical.
After watching some of your videos I had to make room for another hobby in restoring old radios, building the test equipment yo come up with and even a couple scopes. One for my curve tracer and one for fun. Don't worry, she can't get to you now ye are in Ontario. As long as we don't move back to Alberta.😁
Keep up the great work, and hopefully we all can save more of these gems from the landfills and get the enjoyment from them again.
Hi Russell, I feel privileged to be that inspiration. Thanks for your kind feedback!
Congratulations on posting your 200th video to this channel!
Paul you have spent year studying many electric currents and tube uses. I here you talk so clearly and enjoyable lyrics voice. I am going to find a school to attend to build a great audio tube amp
Love it when you go deep into a schematic.
Mr Carlson has the coolest multimeter ever, nixies FTW!
I admire you for doing this! I'm an old tech and am humbled by your knowledge.
Thank you for your time and effort, Mr. Carlson.
You are very welcome Ed!
@@MrCarlsonsLab Dit dit
I'm off-air right now (new roof w/10kW PV system - antennas all down), but we should set up 40-meter sked and arrange eyeball QSO.
@@MrCarlsonsLab: I'm on you Patreon, so, IM me.
TX.
Paul you're still the best on You tube. Glad you explain in detail some of the reasons why things were designed as they were back then..... Learn the most from you and most professional on You tube. Can't thank you enough made my day. 73s Mike wb7qxu
Thanks for your feedback, and kind comment too Mike!
Thanks Paul for the focus on the technical know-how, as well as the testing. push pull and phasing used to be a bit of a mystery to me but I am getting the hang of it thanks to specialists like yourself. Can't wait for the next video.
Sir, you are the 'Bob Ross' of Electronics.
Excellent explanation of the schematics and the design intent of all the components . I took some electronics courses over 30 years ago. Also took industrial electronics, PLC, and Robotics courses back then. I was also an industiral repariman BEFORE I started designing semi-automatic machines and product test equipment . I left that behind back in 2000. I moved into product design in various industries. Now I design plastic injection related products. Did delve into some data destruction machines in 2014. Later Aircraft Evacuation Slides. Also did some work on Blood Counting Machines in 2015. I like the variety in my design career. But I always have loved the "magic" of discrete electronics.
Once again, the 4K video ROCKS.
Your measured, methodical vocal cadence is inspiring. So many of us talk fast and say little (Elon being exception), or speak in confusing twists and turns, whereas your speech seems metaphorical of the scientific method.
Thanx Paul for starting the first. Enjoy watching.thanx Ken from gpt ms
I ment the ge radio. Thanx Ken from got ms
My pleasure!
Fantastic as usual, Paul. So, one thing I'll add to the wrapped component thing is beware of "order of ops" on some of those. When multiples are sharing the same eyelet and they're wrapped, it can be a real pain to figure out which one needs to go first or if they're knotted together; especially if they're completely hidden behind a massive wad of solder on the terminal and there's no visible ears to trim haha. Fun sentence. Anyway a helpful trick is heat and wiggle the parts around to force a cold joint to form and thereby make it a little easier to get them out the last bit.
Great idea! Good onya Nonya!
Hey Paul like you desoldering tip regarding your “Favorite Pilers”. That is a GREAT idea !! We were all thought to make that mechanical connection before soldering. Here’s one for you that I like, I use various size forceps, they too have ridges for gripping but they lock and can work as a 3rd hand because of their weight(if you use large enough one) and you can let them go the weight will with the soldering iron will do the work if you need a 3rd hand. Even if you do not need a 3rd hand I find because forceps lock and come in various sizes and shapes(some come with a curved radius) for me they work better. They are also much finer for chassis that are very busy with components you can get in there much easier. I am frequently using forceps. Though you’d enjoy another perspective.
Ricky from IBM, Ret Englewood Florida
Amazing content. Also the image and sound quality is superb.
52:30 Could that oil be PCB? Definitely something to look out for with old equipment like this.
Hi Paul Thanks for an excellent series, really informative from someone who knows their craft. In case anyone thinks you're OTT with you oil warnings... A number of years ago in Ireland dioxins that had been banned for decades started to turn up during random sampling of bacon products. It turned out that old transformer oil had been recycled and mixed in with modern o il which was used to dry grain. This grain was then fed to pigs and the dioxins in the transformer oil having contaminated the grain then contaminated the meat.
Wow, interesting story, thanks for sharing that!
Dioxins? Omg they're one of the most toxic chemicals around! I think some components may have used polychlorinated biphenyls (pcb's!), which are also dreadfully bad for us.
Unprecedented way of unsoldering the components out of these leads.. thank you for enlightenment..👈😎📻👍🇨🇦
No problem 👍
Hi, great channel. Your pronunciation of chassis makes me smile. I'm from the UK. It's shassey, not chassey lol. Love your attention to detail with describing things, other presenters assume you already know. Thanks.
Yeah that's right Andy! Us aussies & pommies need to learn the mericans how to talk propper! Lol! Nah it's all good. Like solder not soder! Huh?
Great video Paul. These oil filled caps are new to me. Thank you
another fab video - many thanks Paul as always...
My pleasure David!
You are a top notch teacher, I especially love how you guide us through the schematics. I'm learning a lot and hooked on these excellent presentations.
👍. N5KY
I could be wrong but that appears to be a cathodyne phase inverter due to the plate of the second triode is feeding one of the outputs and the cathode is feeding the other.
Nice old radio. Anxious to see the final results.
Great vid, Thanks Paul.
You are correct, the configuration is: One amplifier stage driving a Cathodyne phase inverter, driving two 6V6's.
51:48 The concern being that they might contain polyhalogenated aromatic compounds e.g. PCBs, PBBs, Dioxins, etc?
Excellent video and crystal clear explanations as always. Thanks!
Cracking good teaching experience - so very much appreciated
Glad you enjoyed it!
Now im hooked, really kooking forward to the next episode.
Good to follow the progress and learn from seeing it done. Thanks.
another banger episode mr C. im coincidentally trying to learn about RF interference with audio amps (translation: my guitar pickup hears too much wiggles from the ether) and this is right on topic. unfortunately i fell asleep because you're so calming. its morning now & I dont remember what you said, but hopefully i learned by hypnotism during my sleep. will watch again tonight. cheers mate.
Thanks for all the explainations and your process.
My pleasure!
Thanks, Mr. Carlson!
You're very welcome!
Keep em coming Paul, this series is going to be just great! Can't wait for the next instalment. TFS, GB :)
I'm getting ready to restore a 1937 Philco 38-116. Looking forward to learning all i can from you in this series.
Very detailed, high quality video that you have uploaded. Nice.👌
Wow, this is a description beyond descriptions. Great job. I actually took pictures with one phone and made notes for my reference manual. The use of snubber capacitors in the output circuit as well as the addition of 1K stopper resistors in the grid path of the 6v6s. One thing I have always wondered about is why a capacitor is placed across the output transformer of a single tube amplifier? You're point by point description of the entire circuit makes the video! Thanks
Glad it was helpful!
Interesting, the grids of the 12AX7 appear to be tied together? (29:13)
Awesome! You use the same small flexible LED lamp I use on my bench. I have a pair of them actually but one of them is starting to flicker a bit. I've not a found a replacement style LED lamp as yet but they are awesome for bench use.
The problem is usually the switch, also check the connection on the power supply. Spray some contact cleaner in the switch and cycle it a bunch of times. This fixes my lamps all the time. I think the weak spots are the connections.
Thanks Paul, enjoyed watching. Seen on 22-5-22 at 11:12 in the NL. pe1krx
Very informative and well done!👍😀 Looking forward to the next video. Thanks again for the time you dedicate to produce these videos. Very much appreciated!!👌🙂👏
Thank you for your excellent video. It is amazing the quality of the equipment and your skills are mesmerizing to watch.
My goodness I LOVE your videos! I always learn so much. Even when others may see something as mundane I see it as a new thing. Such is the excitement of a newbie. A 63 yr old newbie. LOL s I mentioned in a separate message I am self taught. I had no one to learn from so I just started reading. I know just enough to be dangerous. Hahahahaha.
I would like to throw down a gauntlet, so to speak. I must admit it is in my wheelhouse of WW 2 radios. I would like to see you restore a WW 2 BC-611. This is a historic radio as it is the very first walkie-talkie. Back then they called it the "Handy-talkie".
Should be a piece of cake. LOL not.
I do a lot of work repairing or building audio amps. Your a correct when you say that all grounding in the PSU so be a a central point, ? We call it a star earthing (grounding) . On solid state amps you should also take the speakers ground to this point as well . A good video . I like you videos because you explain why things are done
Aren't most modern audio amplifiers differential input and output? TI and NXP seem to be that way, the only new amplifier I have that's single ended is an Infineon IRS2092.
I bet when this is fully restored it would sound great. Great looking front panel as well can’t wait for part 3
Perfect sunday morgning view. Thx for the interessting vid. :D
Thanks for sharing such a wealth of knowledge, superb
My pleasure!
I have a AR88 inside the bfo can which looks like one of the IF transformers is stuffed the caps and resistors it is working but then took it apart and found the resistors had gone out of spec due to the heat I recon.
Replaced all the parts and the output improved.
Quite a job to get to the parts.
I thought I would mention this in case you start looking for the res and caps on the restoration.
I love that HP meter! The Nixie display looks fabulous on-camera. Picked up a 3440A (wtih the +- tube!) and with just a good cleaning, it works great. The design was pretty innovative for the time, and is still plenty accurate for general use today. I had hoped to make a video about it, but maybe I'll just wait and learn something from yours instead...
Thanks. Love your approach, whether it be to teaching or electronicky gadgets
It was a really cool video Paul, thanks a lot!
My pleasure!
Mr Carlsan your GE Cx 371 shortwave radio Receiver is so awesome
I love the Nixie tube display in the Ohm meter!!
That was great Paul...Thank You!
Glad you enjoyed it Rich!
I love to hear about "new style resistors"... Thanks!
Hi Paul, the Benton Harbor boys taught me how to solder via their really well done instruction manuals. And, they always said to make sure you had a strong physical connection before you soldered. I always thought it was overkill, but hey, what did I know back then. Not much.
Heath had by far the best assembly manuals for their kits. Wish I had been around when they were still in business.
these kinds of learning videos are soo relaxing... i wonder how they get the color rings on resistors and caps are so perfect? lots of factory machines to make a kool tube radio. 😍 thanks
What a beautiful radio, I want one.
Mr Carlson Sir I Always Enjoyed Your Videos Thank You Very Much Sir.
Another awesome video! You always have interesting commentary. Thanks Paul!
Regarding hooked solder joints, I’d argue that the hooks were done in support of mass production. I suspect that, in the assembly line, some people would install components and others would do the soldering further down the assembly line. Because of that process, component ends would need to be hooked in order to keep the components in place till soldering could be done.
I'm sure there is some cases where that has been done, it makes sense. Thanks for your comment!
fb I'm sure you're correct. It takes more time to bend component leads around terminals than to just poke them through the appropriate hole in a tagstrip, so why would the manufacturer do that if they didn't have to?
@@nevillegoddard4966 On an assembly line, every person focuses on a very specific task. One person might install nothing but specific types of resistors on a one area of the radio chassis. Another person might only install capacitors. A third person might only install IF transformers. Etc, etc. If a person does nothing but install resistors, for example, that person will become highly adept and very fast at that task, and that person will only need specific resistors, and a small set of tools specific to their task. Then, another person does nothing but soldering, that person will become really efficient at soldering, and will only need tools/supplies specific to soldering.
On the other hand, if every person who installs components also needs to solder those components, all those people will also need soldering tools/supplies, which is much more costly for the company. Plus, those people will have many more tasks to complete, which will slow down their progress. Focusing on a single task a couple very similar tasks speeds up production, minimizes mistakes, and saves money by minimizing the number of tools required on an assembly line.
To us, it may seem slow to wrap component ends to terminals, but a person who does nothing else will be able to do it much faster than we can imagine. On such an assembly line, wrapping component ends to terminals would be required to keep those components in place till someone else further down the assembly line is able to solder those components. Back then, it was all about building radios or whatever product as fast as possible with the least amount of cost. Look at any assembly line, and you'll see every person doing very specific tasks, and they are extremely efficient at their assigned tasks. In fact, if you google "1940s radio assembly line", you will see some impressively large assembly lines, which also show how limited each person's tasks were. They're really neat photos to look at.
Cheers!
That looks like 👍 a very sophisticated radio 📻. I REALLY like 👍 it. That’s when radios 📻 were REAL. I saw 👀, and have to watch part 1 of this. That dial looks almost like 👍 the instrumentation 🎷in an airplane ✈️. I’m so glad 🙂 that you’re restoring it. Even the color of that case goes with any decor perfectly 😍. Please keep these GREAT 😊 radio 📻 videos coming. Your friend, Jeff.
9:30 thanks for the explanation on why these types of caps should not be left in circuit, I may have to show this section to the musicians who come into my shop with a amp and a bag of old failed caps and want me to replace them
I am astounded that you’re able to acquire the wiring diagrams on these older systems. May I ask where you find them? Is there an aftermarket database that repair individuals like yourself use? I’m involved in automotive repair and I typically use the OEM service data but I was curious how you find these diagrams where the manufacturer hasn’t been in business for decades. I find every one of your videos extraordinary!
This was pretty obviously the high-end of GE's receiver line, so not too surprising that the schematics are still available. I also wonder where he gets such clean schematics - a lot of the ones I run across are barely-legible scans.
@@drtidrow Hi Ray there are are groups & clubs (& I think a business or 2) that specifically exist to collect, collate & save old manuals & circuits. Some old units even had the circuit diagram stuck to the inside of their cabinets.
bravo you are the best, tnx. so match, respectful from the old BG.
I had heard that the reason components were hooked around securely on terminal strips in the past was because of the assembly line. Several people installed components as the chassis went down the line. Then a solder team would do the task of soldering afterward. The hook-over prevented components from falling out of position.
I was taught that it was best to create a good physical connection before soldering, whether splicing wire or installing leads on a terminal.
Any chance when you do take out the old capacitors and the bad resistors (please leave the good ones in, even if there are only a couple!), you could do a simple single-shot time lapse and post that? I think it would be interesting to see all that work being performed, even if at warp speed.
Love the videos. Thanks.
👍
A couple of leads on resistors and caps on the upper right side of the amp seem to be a bit hairy with short fiber-looking structures. Is that dust or "tin pest" on the tinned leads?
I'm sure it's a combination of both. Cadmium plating oxidization too.
Nice project I have restored a lot of older radios always remember to slowly introduce the voltage to the old tubes with a variable voltage supply to keep them from popping. The sound quality is awesome and some tubes are so hard to get but I have a room full of tubes if you need any tubes let me know the number of the tube. Take care
Gee, thanks, I was just going to go to sleep. I guess not for the next hour. 😂
😆
Nice! A resistor network, carefully tweaked, to match the two half waves driving the push-pull power amplifier output stage.
Tried this on a Transistor version applying a similar principle in a 1 room single-bed workshop during the late 70s,
the only cellar room in the house the parents had deemed safe when set on fire at the time.
Unfortunately, the project was abandoned because this one was soon running out of BD 138 paired transistors while tweaking the pots that had made up the above network.😮💨