Receiver Restoration, Emerson Radio AA5!
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- เผยแพร่เมื่อ 30 ก.ค. 2024
- Here is an Emerson AA5 radio receiver restoration for you to enjoy! For links, click the SHOW MORE tab below.
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: / mrcarlsonslab
#learnelectronics #restoration #repair - วิทยาศาสตร์และเทคโนโลยี
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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
I am already a patreon supporter. I highly recommend it if you are even remotely interested in electronics.
informative as ever, thank you
The CLEAREST audio on TH-cam. I love your microphone.
...+++..!!!
And all the lovely test equipment, ahh...
Agreed. The sound is very warm and cozy :)
Smooth, like Canadian maple syrup.
I always think the same thing, looks like a Neumann 47 or could be a shell and some diy tinkering knowing him, sounds tube or valve as we say here in any case.
Of all the stuff available to watch on the internet ?????? I would rather watch/listen to this fine man any time
As a tech of 22 years and a huge portion of that was my combat comms career on foreign soil, man do I learn a lot by your channel and videos Mr. Carlson. Great informative videos, awesome presentation and please keep up all the great work. 73
I've watched many, many videos on this channel and I am still in awe of the superb audio quality. I really appreciate your attention to detail!
I'm nowhere close to being great with electronics, but I ****ing love your videos, both for the education and for your personable approach to teaching. Thanks again.
Glad you like them Rich!
Never saw anyone use a Balun type wrap like that on the antenna before. Clever idea.
When you have a small AM transistor radio with ferrite inside, it sometimes even works to wind the wire around the outside of the casing. No real need for digging in, except when there's a metal chassis that is playing bad.
@@erikdenhouter I used to make an 80 to 120 turn coil of 24 AWG magnet wire on a paper towel tube or pill bottle, similar to a crystal set coil, then connect two very long wires (over 200 feet each) strung out in opposite directions, and place the coil near my AM radios for super long range daytime reception. Normally we could get 3 or 4 stations during the day but with this I could get about 50. In NW Louisiana I could hear New Orleans, Houston, Dallas, and Oklahoma City at noon on AM.
When you're aligning a radio, it's a good way to put a lot of attenuation on a signal generator that can't get down to really small output levels. :-)
I think that is the most compact AM-5 design I've seen.
Certainly can't get too much smaller with typical 9-pin "miniature" tubes, IF cans, and multi-fin tuning cap.
@@drtidrow The Japanese actually made them even smaller. But they often eliminated the second IF can, compromising performance. Tons of those midget radios were sold in places like Woolworths at very low prices. It's hard to find a clean one today, because the cabinets were prone to melting from the output tube's heat.
Paul, you’re nothing but a radio genius. I am so impressed with your knowledge, your presentation, your teaching and explanation, and your complete and total knowledge of radios from ALL eras. Well done again.
I wish I could get him to tune up all my analog AM radios. Many are new but weren`t aligned well. Sony and Tecsun still sell real non DSP true analog radios but their performance varies wildly. But when you get a good one it`s a great performer on AM and shortwave.
Even as a techie who has been repairing radios for over 40 years, I find watching Mr Carlsons video here oddly satisfying, from beginning to end :-)
I really like your accent. It is so mellow and calming. Thanks for an interesting restoration. It is really interesting to see a tube radio come to life.
THANK YOU! I'm so glad I spotted this video. I have been looking for that exact model of radio and I did not remember what it was. I've scanned through thousands of pictures of old radios and never could find it. This was my dad's radio when I was a kid. We spent countless hours listening to Jean Shepherd's show on WOR 710 KHz in NY. I never knew what happened to my dad's little radio - its image was burned into my mind. So I've been looking for one for years. Thanks to this video, I finally know it was an Emerson AA5 - let the search begin!! And with a little more searching it turns out to be a model 805B from 1954.
Always amazes me how much Mr. Carlson knows about what seems to be everything, and too also be able to explain it in a way I can understand it. Being a member of his Patreon, is a godsend. Thank you Mr. Carlson.
You're very welcome Mitch!
Emerson model 805B from 1954. Notice the PC 150 couplate, called the Audet output stage ,which was really new for 1954!
See Beitman's Radio Diagrams from 1954 page 38.Another finely described radio repair! Thank you so much. Steven
Adorable little radio. And I remain impressed at how many AM stations you can pull in, even with a relatively low-end receiver. Guess that just shows the benefit of an outdoor antenna.
"Scan the Band!" Every video has something new meaning there's reason to continue watching and learning. Theae early radios were like today's internet in that they brought knowledge to the people in efficient mode. Making them AFFORDABLE to the mass market tugs at Henry Ford's heart. Just keep the knobs on when using them. THANK YOU MR. C.
Thanks Paul, I really enjoyed that restoration of the little Emerson radio. Brings back memories of when I worked on tube type radios in my younger days. In fact, thank you for all of your videos. You do such wonderful work on all of them.
Great content, excellent audio quality. Most informative radio rework...wish I had Mr. Carlson to watch 40 years ago!
Another great little radio preserved. What a neat looking little thing, very 'modern' design. 😊✔
I Have to say that I love your shop. It's obvious you care deeply about all of your stuff and it makes me feel good for what it's worth that you are proud of and share it with me. THANKS! KUTGW!!!
Word of advice for everyone playing along at home: make sure to mesh the plates of the tuning capacitor all the way before handling the chassis. You can see Mr. Carlson eventually did this at 15:15.
If the plates are sticking out like in the video, you risk accidentally bending them and shorting them out! It can happen easily, when you pump into them with pliers or if you grab the chassis the wrong way.
This small receiver is a teaching gem. I just learned a ton of pathway info from this video, and the simplicity of your delivery is amazing. Thanks, man.
I really liked the topology / signal path discussion. Thank you.
Great fun. And, you're right, sometimes the coffee is a needed tool. Thanks. It's appreciated.
Being a complete novice at electronics, these videos are amazing to me. I learn and try to understand every aspect of the repair! Thank you for the great work you do on your channel. Will be heading to Patreon asap!
Thanks Paul, I didn't know the IF transformer had two adjustment points. Another great video.
A compliment to the industrial designer on this one. Beautiful and fully resolved. I wish I knew the names of all of the designers on the equipment we see on your channel. Even though the power cord is a rather lowly component it would have been good to replace it with one of the same colour, as the original designer would have intended.
Sweet! I'm excited about the AA5 project! I'll be looking for it!
Really nice radio
Good job thanks for posting
Cool 5`s got me started in understanding radio! Remember the paper capacitors inserted in the ceramic cylinders, they were
mainly use in TV sets. When they shorted, they would telescope out of the cylinder. A amazing view. Enjoyed watching!
Thoroughly enjoyed this video. Makes me relive the thrill of building my first serious electronic project as a 13 year old boy in 1965, an Allied Radio Star Roamer 5 Band shortwave radio. It started me in my 50 year career in RF, audio, video and IT engineering. Or maybe it was the #45 tube I got from a 5th grade friend who's dad had boxes of tubes in the garage. Either way, I love your work and videos. Keep it up!
Another example of the best teaching on the internet.
I always love how professional and detailed your videos are. Love this cute little radio :)
Thanks for your kind comment Brendan!
I have that radio. It was in my granny's kitchen, then in my dad's workshop.
I had this radio at one time, but it was a dark brown bakelite. It was a good performer too despite it's small size. It was just that I was put off by the huge amounts of noise on the AM dial and lack of music stations. When they moved the aircraft and police bands off shortwave, it didn't leave much else behind. That is what really ended my relatively short foray into restoring antique radios. So I ended up selling all my antique radios off, save for four of my larger radios, which I really like the look of.
Excellent restoration , and great sounding radio.
Mr Carlson your are good at electronics restoration on vintage shortwave radio Receivers and Aliament
Great clinic as always thanks for doing these vids! real well done Sir!
I feel like I learn something new every time I watch one of your videos. Thanks for always taking the time to explain everything.
My pleasure Michael!
I began my 35+ year electronics career at 14 years old with my boss putting me on 5 tube radios after a short course on tube checker procedures in 1965 in Clarksdale MS!! Still got six of them on shelves in my mancave! Can't part with them!
I have trouble wiring a wall outlet, so my electronics knowledge is quite limited. The only radio I own is 20€ cheapie. Yet I watched an hour long video of a very knowledgeable repairman fixing a radio that is considered obsolete by the casual observer. Excellent, subscribed!
Mr Carlson…. A suggested future tutorial….. recone a vintage radio speaker……. Thanks for all of your great how-to’s. Very much enjoyed and appreciated.
Thanks so much for your latest lesson Paul. At about the same time that you had the All American Five radios, was had exactly the same type of thing here in the UK. However, as we're on 240 volt mains power here the radios had a large wire wound 'mains dropper' resistor that reduced the mains just enough to allow the valves (tubes' to connect in series just as they do in North America. The same arrangement worked with TVs record players, etc. The downside to this system was that the cabinet could get as hot as hell, and in some cases they even burst into flames! Keep up the good work and keep yourself and family safe.
Thank you! Paul, I always learn something new! congratulations!
I love you, man. This video, and the one about your new antenna, came out just as I was fixing up an S-38 and piecing together an end-fed antenna for it. Thanks for all your hard work, brother.
Glad to be there! You're very welcome.
Спасибо. Очень интересный аппарат, как в плане простоты схемы, так и в плане компактности конструкции.
Hooray another dose of carlsonitis to watch daily for the next month
Carlsonitis 2021😇😉😷
Awesome Video my Friend , Thank You !!!
Mr. Carlson, as always your work is impressive.
As always, thank you for you sharing your awesomenes!
Your restorations and alignments just put me as about as a happy place those radios when they are done!
73 de N2NLQ
Thanks for your kind comment Michael!
that pc is very very cool. Very cool channel; new and experienced engineers will learn something that can be applied to modern and antique electronics. It's content like this is why I pay for youtube premium. Thank you Mr. Carlson
Thank you very much, learned something.
Very nice, thanks for sharing.
Thanks for watching!
The radio is cute in such a 1950s (mid century) way! I wish there was more of these
great video, it would be interesting to see some repairs on old television sets
These little radios can be tricky to fix. I really liked your video, I learned a lot! Thanks :-)
That was an easy one Paul and a cute little radio. I do like the style of North American radios, simple and clean designs. All the best 🙂
...small things are ALWAYS cute-!!!
A good little radio for listening to Coast2Coast Am late at night.
I love that they cared about health and safety on this radio, even though it sacrificed the cosmetic looks of it, but they should've highlighted a marking on the plug connecter to help indicate the live prong so that you don't connect the chassis to the live 120VAC line as AC has no polarisation.
Wow !! what a real gem from the past.
Paul - you said something that caught my attention of Resistors going up in value - how and why does this happen. Could you discuss this as I thought a resistor was a pretty stable component .
Thanks for a very informative video.
As always You are a great credit to the industry...
Mr Carlson the radio speaker is in good shape it looks like new that's so awesome
That's a cute little radio overall, but I dunno about the color! I'd really have to restrain myself from repainting it; good thing it's on your bench instead of mine! Thanks for another fun trip to the lab :)
Great one again Paul. One video I’d love to see (either here or on Patreon) is how you get the great audio on your videos. I’ve tried various tricks but can’t get close on my videos 😊
Your videos on radio restorations are always very thorough with all the details to help a viewer in the future. I view many restorations such as these from many channels and it seems to be common that there are disappointments when moderators find modifications that were not performed up to the standards of the moderator and or poorly or uncalled for modifications. Although safety modifications such as polarizing line cords and fusing seem logical modifications, some might consider that a radio such as this will be maintained in a collection and not ever to be used as it was originally intended. So in the far off future, in the ownership of someone else and if it needed servicing for aging and not for use so much, it would also be logical that it would not be taken apart by a child in curiosity as I did once. And when a skilled technician would open it up for servicing, the same words that are uttered today on TH-cam channels will be uttered then, "it is disappointing that this was done as the value of this nice radio has been greatly reduced." One might consider performing an exact restoration with the small dangers of the original design, considering the non-epidemic deaths from vintage radio restorations, one might install at tag with a string that says, "REPAIRS TO BE MADE BY QUALIFIED TECHNICIANS ONLY, HIGH VOLTAGE KILLS". I believe you have some of the top videos on TH-cam and keep them coming, very much enjoyed.
Mr Carlson your vintage Emerson radio Receiver AA5 with broadcast band is good for DXing at night and day that's cool
Thanks for another great video! I enjoyed the loop stick antenna trick.That radio was actually so sensitive after you aligned it that stations were coming through the signal generator cable! I thought I heard CW coming through a couple of times too. I get a kick out of these amps on Ebay that (almost) ALL have the waxies still in them and there shown with the tubes glowing! Sold "As-is" with a "loud hum". I've actually seen used waxies sold on Ebay!
This is gonna be good!
Nice video Professor Carlson on this really nice looking and well made radio for its size, year it was built etc. Well done !!
I built one of these is my high school electronics class as my final project, all discreet components and point to point wiring. . it used a 35w4 rectifier and a 50c5 for the audio amp driven by a 12au6 all of the heaters were in series across the 110v AC. Wish I would have kept it.
What a cool old 'relic' !
I just finished an Emerson 543 which had a similar cardboard speaker guard.
really really cool... thanks....
Great video. Best DVD:)
I'm glad you changed those capacitors, because those things can bake the tubes, and the transformer.
Another great vid Mr Carlson! 👍I would add that I always throw in a MAINS SUPPRESSION cap across the mains input. It's cheap and the number of times I've found it works well in reducing mains hum et I had a surplus of some old vacuum cleaner mains suppression caps and an 8 valve superhet Pye radio I restored was good, BUT the mains was not so clean... adding that, cleaned it nicely.
I used to make an 80 to 120 turn coil of 24 AWG magnet wire on a paper towel tube or pill bottle, similar to a crystal set coil, then connect two very long wires (over 200 feet each) strung out in opposite directions, and place the coil near my AM radios for super long range daytime reception. Normally we could get 3 or 4 stations during the day but with this I could get about 50. In NW Louisiana I could hear New Orleans, Houston, Dallas, and Oklahoma City at noon on AM.
Thank you very enjoyable. Mike.
Thanks, I didn't know the detail about the smallish audio coupling capacitor used to reduce hum. I have a beautiful and slightly newer Emerson FM table radio that I've restored and aligned, and now I want to try going back and increasing the size of the filter capacitors a little bit and the audio coupling capacitor too.
I'd love to see the Compactron 2 :)
One of my favorite bedtime stories.
Love your work...perfect...
Thank you very much!
AM radio! It still exists here in Australia although I don't know anyone personally who actually listens to it...
In my house, the TV doesn't and hasn't been used in years now! I kinda get a feeling that someday soon someone is actually going to turn on the TV and it's capacitors which have possibly gone into a coma by now are going to get a rude awakening and explode!
Might have to put it on the Variac and wake it up softly from time to time to try and prevent it from going nuclear!
Thank you for putting in the time to talk about capacitor parallel resistance! This is the only channel that takes this failure mode seriously!
I watched Dave over on EEVBLOG perform a repair on a TV, I just don't understand how he didn't check the capacitors for parallel resistance even though he was using an LCR Bridge Meter to test the capacitors, he looked at the capacity and ESR readings and that was it!
I don't have that particular meter, the DER I think it's brand is called, it's been around for some time now but I'm sure that it has the capability to test for parallel resistance and many people have these things but they only use them to check capacity and ESR! I just find it so frustrating to watch this, Dave didn't get the TV going in the end!
Although I can tell that the capacitor that Dave tested wasn't suffering from low parallel resistance because it's capacity was just below what it was actually rated for! Unlike a video by 12volt vids where he repairs a beautiful Denon amplifier, checked the power supply filter capacitors for capacity and they were over achieving and returned a low ESR value and to my horror he said that they were excellent! LoL... I just can't watch this sort of thing!
I left a comment as did others and I got a reply that the customer didn't want to spend any more money on it and then in a second video spends money on making unnecessary modifications?
Yeah the customer never wants to spend money! Especially if you don't tell them that if they don't spend money on this particular problem, it's going to destroy those unobtainium output stage transistors and the amplifier is going to be junk!
It's extremely rare that a capacitor will destroy another component from high ESR! Sure, you might get more hum but it's parallel resistance which is responsible for killing components but this knowledge seems to be absent from the whole industry!
Even a simple wattmeter can give a very good clue by showing power consumption at idol, just about everything has power consumption rating printed on the back! There's simple methods that can be used which will give away a device that is in really bad condition, even just a simple incandescent pilot light globe with a variable resistor across the power supply with show up bad filter capacitors in the power supply as soon as the amplifier has to deliver some bass! Older equipment that used incandescent bulbs as power on indicators would dim under load when something wasn't right! It was an accidental feature! This no longer exists! Why? Who knows?
But as I said, I'm glad that you are pushing this knowledge out there! This should be known by everyone in this field...
Thanks so much once again Paul, I'm throwing another shrimp on the BBQ for ya....
Another great video.
Mr Carlson the radio cabinet color gray is in good condition that's cool
Fine little radio Paul. Thank you for sharing your good work. Here in Germany there is not much left on AM, some foreign stuff. 73 de Olaf DK6KF
Mr Carlson there is an AM station in Chicago call sign WLS. It has a clear channel at night. I could pick it up down here in Texas on my AM radio in a Datsun 210 easily. Frequncy was 890.
very interesting mr carlson thank you
You are very welcome
Cute little thing! Surprised that the case held up to the heat
thx paul hope your havin a great day. regardless of your location and time :(
25:29 ofcourse the coffee 😋 is the most important tool
That radio looks like 3D printed, cute :D
Thank god, I was getting Mr Carlson withdrawal.....
Excelente:
Un Cordial Saludo desde Cuba.
Late night makes me think Coast to Coast AM
Paul,
I really love these restoration videos but Im not familiar with many of these older devices. I just wish you could give a little more background of these things - model number, age or year of mfr, etc. for historical perspective.
Thank you
Paul (In MA)
Most US made radios wouldn't have a schematic on the bottom. The missing paper probably just showed the tube locations on the chassis. As for working on an AA5, I won't go near one without an isolation transformer. We always called the ceramic multi lead devices "couplates" or "PEC's" for "packaged electronic circuits". Interesting that this radio so easily breaks into oscillation. I'm thinking that the compact design places components so close that there's enough radiation between the stages to cause a positive feedback loop . Sometimes reversing the antenna leads will help eliminate IF oscillation, though in this case, probably not. Most AA5's I've serviced haven't been this sensitive to oscillation, and I wonder if maybe the IF transformers in this set haven't been replaced with generic units at some point in its life. I guess Emerson was late to the game with printed circuit boards. RCA, GE, and Motorola had already begun using them prior to 1955.
Nice :)
@ 20:30 recorded live down in Mr. Carlson's deep-underground, Faraday-caged bunker ;-)
A neat video with a bit of everything for the restorer. I personally would suggest that the exposed 'live' connections within the radio - the switch tags, fuse and stand-off pillar are sleeved to avoid accidental contact. I do realise that you are using an isolation transformer on the bench so the danger - to some extent - is mitigated.
Would like to see you do a video on "starved-circuit" audio amplifiers, their practicality, and how to utilize them.
Hi Don. I will do a video on "space charge" tubes in the near future. Thanks for your input!
Can you make a video about ground loop buzz and hum, how to measure it, fix it, understand it ?