Bush Battery Radio 1936 Part 2
ฝัง
- เผยแพร่เมื่อ 22 พ.ย. 2024
- A friend bought this radio only to find it was a battery set. It looks to have been 'restored' not that long ago but has been left to deteriorate. I have been tasked to resurrect this relic from the thirties, I have the radio working but it needs a power supply to replace the now extinct batteries. I have an idea but will it work?
Buy me a coffee ☕:
www.buymeacoff... (Only if you want)
RetrObright:
en.wikipedia.o...
My Digital Signal Generator:
The Signal Generator is a project kit from a local electronics magazine called Silicon Chip, there is a sister publication in the UK called Practical Electronics, it was featured in the April 2018 edition but mine has a oscilloscope function as well which I don't use. There may be a later edition in PE with that feature.
Here are the links:
Aus: www.siliconchi...
UK: www.electronpu...
Music: www.bensound.com - www.epidemicsound.com
great PSU good to see you wired the fuse holder the right way
Thanks for noticing Ian 🙂
The early morning (for me) calculations gave me a pain between the ears, but I had no doubt it would work. Time for a happy dance. The finished product looks outstanding.
Hi Wayne, a couple of aspirin will clear the pain 🙂 I did a little happy dance when it worked. Thanks Wayne 🙂
"Build my own power supply? How hard could THAT be?" Now we know. Yours was built to a high standard and should outlast us all. Thanks for sharing.
Thank you for watching Don 🙂
David, you've outdone yourself in this episode... what a pleasure to watch you create that transformer and power supply. Brilliant stuff !!! That radio sounds amazing... you've done a great job- your metal working skills are very good as well. All I can say is BRAVO my friend... really really nice job !!!!
Thank you Ron. It was good fun and I loved using my new toy bender. The radio works so well I was very impressed, Bush made good stuff. Thank Ron, Take care 🙂
Funny thing about these really old directly heated cathode valve designs -- they were instant-on, coming to life as quickly as an incandescent light bulb. The newer indirectly heated cathode valves took several seconds to warm up sufficiently. However they did enable designs where the cathode was no longer electrically tied to the heater supply.
Loved this video. It had everything: wiring, taping, winding, cutting, bending, drilling, filing, painting, breadboarding, soldering, testing, riv-nuting, and best of all mathing.
5 out of 4 people couldn't do the math for this project 😂. The LEDs were a nice touch. Looking forward to part 3. Thanks Dave!
Thanks Steve, that's quite an inclusive list there and I did have to lay down for a bit after the maths. Part 3 next Friday 👍🙂
Crystal clear sound from a crystal clear mind.!!!!
Great work Dave - very impressed by that power supply - as an Electronics Engineer I'm gladdened to see someone take the time to properly mount and house an assembly.
Hi Graeme, thank you 🙂
No battery eliminator so you built one from scratch. Now that is ingenuity! Even worked out the bugs in it so it works
far better than one could believe and with a great cover. You got some great tools at your disposal!
Hi Steve. I looked at what was available at about 140 Volts and they were too expensive, this worked out much cheaper. I like to have as many tools available as I can, it keeps me happy... the wife not so much 😉😄
I give up...thought it couldn't become better...Man, what a craftsmanship, absolutely phenomenal!! You naild it, again!
Thank you Jacob 👍🙂
Love the battery eliminator, so much work but what a great job. It really adds to the radios appeal. Nobody wants to spend a fortune on batteries and a linear power supply is the only way to go for noise free listening.
Thanks Radio-Ged. A lot of work for sure but worth the effort I think 👍🙂
Hi Dave, great video. Our hobby offers a broad spectrum of different challenges from metal sheet bending, JB-Weld glueing, electronics, sewing, soldering, transformer turning, capacitor cooking .... and this is what differentiates the professional from the ordinary restaurator - you master it all.
Haha... thanks Thomes, I'm glad you included capacitor cooking, that is my forté 😄
I am utterly amazed by the unique and meticulous work you have demonstrated in creating that wonderful power supply. Words alone cannot adequately express the quality of your workmanship.
Thank you lakrfan 49 👍🙂
Dave, don't count yourself short on this marvelous bit of engineering. The best engineers design down to the safest but minimal circuits . Great job! From a 45 yrs ET.
Thank you David, that's a nice compliment from an ET 👍🙂
Fantastic job. In the UK the wire mesh and grid are very expensive, but I have found a free source. People often discard the thin metal garden chairs and tables, either because the paint is faded or a mechanical failure. Many of the sets have thin grid or mesh for seat bottom and back and the table top. I grab it whenever I can.
Ikea ?
Thank you Dances with Aardvarks. I racked my brain for sources of mesh, all I could get was large sheets for over $400. The piece I ended up with I got from a local factory as an offcut for $10, I think it is used for making perforated ceiling panels 🙂
Just watched this whilst waiting 1hr for the next train in London UK. So glad I missed the earlier train 😁😁
Haha... thanks Stephen, it least it's good for 40 minutes 👍🙂🚂
DAVID TIPTON BUSH Battery RADIO Receiver is cool
Thank you Greg 🙂
Fantastic build. Looks better than factory. I am amazed as always.
Thank you Johnny 🙂
Excellent work Dave! I tried the same transformer surgery in 1973, which became a total failure due to the insulating paper and varnish gluing the windings in place. I never thought of using a heat gun to soften the varnish - good idea.
I wish there was direct communication between us, I could have designed a 2 and 144 volt regulator for you, based upon parts you have on hand. Those LM317 linear regulators need 2.5 volts of headroom. I could have designed a regulator for you that only needs a few tenths of a volt headroom.
Perforated metal covers do not increase the cooling of the internal circuitry, this only helps if you have a fan forcing air flow through the box. To get the heat out of the box, the big heat generating parts need to be thermally tied to the box so it will dump the heat outside the box.
Thanks Bill. There were other regulators I could have used but was concerned they might induce switching noise into the set. If I need another power supply I'll let you know. I was more concerned that the cover would inhibit cooling. The whole thing when operating with the cover on only get mildly warm with a temp probe inside the box, it would have been nice to have one side a big heatsink though, I need to sift through some old TVs 🙂
@@DavidTipton101 A linear (non-switching) regulator is the only type I would consider, due to switching noise. I have done successful switching power supply designs with receivers but, you have to carefully "can" the supply in a seamless metal box and use at least a 3 pole filter using feed-thru capacitors to run signals in and out of the box.
With heatsinks, most are designed with forced cooling air in mind. In order for convection to take place in a fan-free design, the fins need to be spaced at least 20 mm apart. However, if the heat dissipation requirement is not that great, just conducting the heat to the box exterior is fine. Painting the box black helps as well, as it increases infrared (radiated) dissipation (particularly flat black).
@@billharris6886 Yes that's what I thought with the switching regulators. With the reduction in windings and voltages I managed to lower the temperatures but as I said in the video there would be better ways to do this for sure.
A number of legacy and modern designs of equipment do have passive ventilation holes, so I wouldn't say convection through that counts for exactly nothing compared with a sealed box. It's still less than with forced air, granted. But how many radios and TV sets have fans? Probably uncommonly like zero.
I'm one of the pickier engineers on Dave's page and still I think I can see over pickiness. Would clamping a device to the inside of a solid aluminum box work better to dissipate heat? Yes. Did our intrepid DIYer wish to do it? No. IMHO, it would be a bear to test for the non perforated box has to be closed. It might have been nice for Dave to test device temperature with box closed though.
@@SeekingTheLoveThatGodMeans7648, thanks for the comment. I was just sharing a tip with David that I learned in the past through much trial and error. This was in the design of an airborne communications transceiver where the customer wanted 120 watts of dissipation in a small package to operate over the full military temperature range yet, wanted long term reliability to be as high as possible. The real kicker was: No cooling fans or cooling air were allowed. So, many experiments were tried to determine the most efficient means of dissipating heat. The traditional designs of the past were tried: solid covers versus holes in the covers, in addition to numerous heatsink designs. In still air, holes in the cover showed no real difference in reducing interior box temperatures but, the holes did compromise internal circuitry from the elements and allowed more EMI to pass through. In summary, it was found that thermally tying large heat generating components to a low thermal resistance path to the box exterior performed best. The highest heat generating devices (power transistors) were best thermally tied to a large heatsink with fin spacing of 0.7 to 1.0 inch to encouraged the best convection.
As far as holes and slots in covers that have been used, I suspect this is somewhat of a tradition, with little thermal testing done to prove the design. With vacuum tube circuitry, these devices are basically modified incandescent light bulbs, in that the temperature of the emitter (or cathode) must be raised to the point causing electrons to boil off. Electron tubes don't mind heat nearly that much however, semiconductors and electrolytic capacitors do. With the much higher heat output from vacuum tubes, due to the higher temperature difference between the inside and outside box temperatures, convection can take place with smaller holes in the cover.
The best part( for me) of all your videos is when you fabricate components or rebuild parts. Then you renovate the cabinets. It’s all very interesting to watch and very enjoyable. Thanks for another great video.
Thank you birdie399, I'm happy you find the whole journey interesting, it's good feedback thank you 🙂
I thoroughly enjoyed that. Thanks once again Dave.
Thank you Manuel, glad you enjoyed it 🙂
Is there anything you won't tackle. Rewinding a transformer. Building a battery eliminator. The list goes on. Stunning work on that supply. Anyone looking at that will think it's a bought one. I thoroughly enjoyed watching this build/restoration. I can't wait to see what you do with the cabinet. I'm sure it will be next level.
Hi Ian, thank you. I'm glad you enjoyed it. The final part next week 🙂
'Lack of knowledge' - I don't think so, this video is excellent from start to finish, looking forward to part 3!
Thank Lockdown Electronics 👍🙂
Old school or not, who cares when you achieve the desired outcome. If you're like me you're not doing some of these things to generate income, the satisfaction comes from the challenge and admiring what you've been able to achieve. Nice work mate.
Hi Graham, thank you. If I was doing it to create an income I would be at the soup kitchen 😄 It is satisfying when it's finished and working 🙂
Wow, Dave, once again your craftsmanship is awesome! You Aussies show your British heritage with UP being OFF on a switch. We all know UP should be ON! Come on Dave, be reasonable, do it my way! 😊😊😊
Thank you Super Het. It makes sense for up to be on but we do it the other way, there is probably a reason for it somewhere going back to the 17th century. Anyway it's too late to change, sorry 😉🙂
It was a treat, Dave !
You're not an electronics engineer as you said but it is the result that counts. And that is GREAT.
Cheers
Nard
Thanks Nard 🙂
David, you commented that you are not an engineer.
I disagree you may not have a degree but, you are an incredible engineer,
machinist and craftsman that amaze your audience.
Hi Mack, to be fair, I said I wasn't an electronics engineer, I was a mechanical engineer for over 40 years but I was happy the electronics part worked, it was quite a learning experience. Thanks Mack as always 👍🙂
Your ingenuity has no limits, Dave! Simply fascinating...
Thank you HH 🙂
Bloody hell Dave! Above and beyond the call of duty! You're a braver man than I. Absolutely superb and it was a pleasure to watch your problem solving process.
Thank you Paul, much appreciated 🙂
It was a real treat watching you put this together, from design to fabrication to finish. Great job.
Thanks Moshe 🙂
And again WOW!!. Is there anything you can not make ??. Rewinding a power transformer to suit. Making your own chassis and finally the finished power supply. A great job and as others have said you have out done yourself. I'm looking forward to the next installment.
Hi Stephen, thank you, something a bit different there. Part 3 is up 👍🙂
A new video brightened up my morning but as it is the 1st of April and something slightly different, I was waiting for it all to explode as an April fool! Once we got a few minutes in and it was your usual meticulous attention to detail I relaxed and thoroughly enjoyed it. My wife heard the intro music and asked “Is that Dave the nice radio man in Australia?” She joined to watch as well and I may have got her hooked😀. Thanks for all the effort you go to, not only in the restoration work but also the video production.
Thank you Dave, I didn't think to do an April Fools video, probably just as well. I'm happy your wife enjoyed it too, that's nice, say HI from me. The video takes as long as the radio sometimes 😄 thanks Dave.
I'm speechless, just when I think you've knocked it out of the park; you do this..! Fab info and fabrication..I got a bit lost with the math but after a bit of research, I managed to get a grip on the transformer winding technique. Great video and love the metal bender...Ed..uk..😀😀
Thanks Ed, the math is pretty straight forward thankfully. My new bender works very well for the small work I do 🙂
Wow. I love that psu. I love love love that its metal and looks like something from that era that you'd expect to see inside. I like the attention that you've given to heat. You can never have enough heatsinking and its great that you've got everything running at sensible temperatures. I really enjoyed watching this.
Thank you Seiskid. I was happy with the temperature in the end, maybe 20C above ambient and it looks good in the radio but that's next week 🙂
What a fantastic job on the power supply!! I've made a few and I wouldn't want to put them next to yours 😂
You do amazing work, Dave. I always enjoy watching your videos. As I've mentioned previously, you've inspired me to get to work on some radios that have been sitting around for some years now.
Besides the sharp looking power supply, I believe that the largest difference between my restorations and yours are my rather generous amount of profanity when something goes awry. LoL
I'm looking forward to the next part of this one.
Thank you Tim. I hope you are having success with your radios. Generally not a lot of profanity when I'm working, if it goes wrong start again. Part 3 and the final next week 🙂
Hi David I am amazed at your skill and attention to detail. I wish I had a metal bender like the one you show in this episode. I used to get boxes etc made up at the local metal fabrication shop in Mullumbimby. Alas, this town is now highly gentrified and a lot of industry has moved away. Rewinding mains transformers is tricky and your coil winder is ingenious. Now I see a use for arduino.
Those old Mazda valves in this radio look so elegant and they are all still working even though most of the other parts have expired. I am now going to watch part three thank you for these videos
Robert
Hi Robert, thank you. The bender wasn't THAT expensive and has made life easier. I have another transformer to rewind but will improve my winder before I do it hopefully 🙂
Most interesting and enjoyable. The guillotine/bender is really very good for something so small. And the vinegar on galvanized metal was completely new to me! Thanks Dave, a wonderful job all, as always.
Thanks Mark. The guillotine/bender is very good, I wish I had one years ago. The vinegar etches the zinc otherwise the paint will fall off, I used a galvanised specific primer as well 🙂
Another fantastic repair/restoration. You have pushed me into buying a combination metal worker. I have a shear and a cheap bender, but combining the shear/metal brake/roller in one. Found them at Walmart with free delivery. You can pick up a step motor and controller on e-bay and have full control over the motor speed for the winder. Thanks for an awesome video.
Thank you Vern, is there anything Walmart doesn't have? The shear/bender works very well and will be great for little jobs I used to struggle with, I even used the rollers the other day and that worked well too. A stepper motor would be the answer, I'll see if I can find one, thanks 🙂
I love the way you put holes in metal David. It reminds me of a job 5 years ago, putting a 400mm down pipe water strainer in the top of a 5000 litre 80 year old galvanised iron drinking water tank, water supplied by house rooftop rain water.
Out with the electrical drill and in with the tin snips. Luckily I was rerendering inside the drinking water tank with cement mix at the time and had part tank top lifted to get in and out. I was able to recover all of the drill metal turnings.
I could see those larger holes coming in the power supply cover. At the end of the video the power supply presented like a retail show piece. It’s clever work!
Cheers
Peter
Hi Peter, that's big hole, keeps the mozzies out though. I was wondering how you would recover the swarf but you had it covered. Thanks Peter 🙂
Yes good observation! It was a big hole and I only needed to drill half a dozen holes to get the tin snips started.
On the same note, I have removed sections in metal like you have by drilling so many times and cleaned up with a good file.
You’re becoming a real metal fabricator. I wonder if you will ever fabricate a complete vintage valve radio chassis?
I was an aircraft engineer so sheet metal was a part of the job. It wouldn't be too difficult to fabricate a chassis, maybe one day.
Great repair and some engineering work. It turned out really well and stylish.
Thank you Robert 🙂
Absolutely professional, from start to finish.
Thanks you Ethel 🙂
David Gotta hand it to you , very professional job , You make it look easy ! The transformer coil counter and the sheet metal press / cutter . Thanks for sharing your knowledge. Very enjoyable to watch . Take care
Hi Keith, thank you. I enjoyed playing with my new toys. My pleasure, take care 🙂
Amazing work on this project. The power supply really came out nice overall. I can see how one would appreciate the metal working machine you used in this video. Very good of you to show us all your new James Bond workshop wonders!
Thanks Jeff. The bender is very good and perfect for what I do, I could have used it years ago 🙄🙂
impressive work on the power supply (and the radio)
Thank you Paul 🙂
David, I had a friend say I had the patience of Jobe when I was an advisor for a group of middle school students in an OM project. You showed me to be a piker with your whole rebuild of this radio and power supply!
Hi Cress, I would have no patience with middle school students though, thanks Cress 👍😄
Wow that was amazing how you rewound that transformer and it was spot on. I was never that good in math but you did it perfectly and on the first try. That's a really neat supply you made for that radio. The radio sounds perfect as well. All in all a fantastic piece of work. Thank you so much for sharing.
Thank you LUCKYLARRY. I'm not that good at math either but these are simple calculations so it wasn't too bad. The radio is very impressive, Bush made good stuff 🙂
Not too shabby! Looks great.
Thanks Kevin 🙂
David! You've definitely blown me away on this episode. Thank you!
Thank you Dave 🙂
So, now you're an electronics engineer aswell. 😊That turned out just fantastic. The same eye for detail as in all your restorations. I really enjoyed watching that. Thanks!
Hi Rene, I'm not an electronics engineer by a long shot, I kinda managed to cobble together something that worked but it took a lot of experimentation to get there, I was happy with the result though. Thanks Rene, I'm glad you enjoyed it 👍🙂
Fantastic work again Dave.
Never thought I would see you winding your own transformers.
Your tool collection is growing quite nicely. I love the guillotine/bender/roller. Quite a handy tool to have.
Beats tin snips and bending with a vice and hammer any day
Thank you 1974UTuber. I got the winder to rewind output transformers as they go open often and are difficult to get but the winder sat there for 12 months so I seized the opportunity to use it. It turned out to be pretty easy. The guillotine is great, I could have used that a long time ago, it made it so easy 🙂
Superb attention to detail on the PSU, I am very impressed the way you rebuilt the transformer & got the voltages spot on!
Looking forward to the next episode.
Thanks markpirateuk, amazing what mathematics can do 👍😀
What a superb job David...looks better than OEM!
Thanks cogidubnus1953 👍🙂
A Friday of Aussie excellence, first entertained by Penrith Panthers, then onto an update on the Bush. Excellent results as usual in my view your power pack solution was built to beyond professional standards. As a young lad studying Plant Engineering and a task was to make, with braised joints a metal box like you base piece access to that guillotine and bender would have been handy 😂. Looking forward to seeing how the cabinet turns out
The Panthers prevailed but the Bunnies hung in there, it was a good match. The Panthers seem to be on another level to the rest. The guillotine/bender is very good, I wish there were around years ago. They made us do things the hard way in training didn't they, we had to file a 6" square piece of 1/8" mild steel perfectly square with a 1" insert in the centre which could fit in any direction with no light showing through, it took weeks to do 😄
@@DavidTipton101 Aye they did, very old school in my time, white lab coats or the tweed jacket when lecturing us, no parking, few lads with long hair given some stick, couldn't happen now. One lad taking shortcuts using a lathe, lecturer powered off the whole workshop and literally tore strips of the lad concerned as we looked on. They referred to you as "Mr", Mr Sherwood do you know what your doing?....😂 Happy Days
@@kensherwood4866 That's it exactly 👍🙂
Incredible workmanship. You out did yourself this time. Truly outstanding, thank-you very much
for all the hard work, you are one of a kind.
Thank you James, much appreciated 🙂
Hi from NZ. I'm just about to watch this video and to say I have watched every upload you have made so far. I find them well made, enjoyable and educational. While my interest is mostly audio, I do enjoy watching you use your skills in repairing and resurrecting radios that would otherwise probably end up as land fill. Thank you David and long my you continue with this kind of work. Being a fellow uploader to TH-cam I know the time and effort required in producing such material.
Hi Michael, sorry I must have skipped over your comment. Thank you, indeed the video takes as long as the repair sometimes, sometimes more. I am subscribed to your channel but didn't have the bell clicked but all fixed now. Thanks Michael 🙂
@@DavidTipton101 Thanks David for subscribing to my channel, I really appreciate it and look forward to seeing your comments.
oh David home brew power supplies and all so beautifully and carefully made ...you are a marvel!
Thank you Chris 🙂
Seeing you get such a high quality result on your first try is astounding. Especially making the metal case from scratch. Great job rewinding the transformer too, David.
Thank you videolabguy. It was trial and error 👍🙂
I love your excitement when you tested the transformer.
I didn't know what to expect Shannon. More good luck than good management 😄
David creates a work of art from a conventional power supply. I admire your work. Russia is watching .
Thank you Pavel 🙂
Without a doubt, you're one of the best antique radio restoration people on TH-cam. I learned a lot from this video (and most of your other videos too!).
Thank you Zenith Coins and Hobbies, glad you enjoyed it 🙂🙂
What a great job on that power supply. Some years ago I made a mains / battery unit, which I found on Practical Wireless. This used two transformers, 250v AC to 6v and the second transformers 6v AC to 110v. The 6v also ran the valve heaters. The 110v was a bit higher than 90v, which was required. I used this for many years, I'm not really into rewiring transformers, though I did add extra turns to boost 12v AC up to 15v. Looking forward to your next video.
Thanks Nigel. I wondered about using two transformers before deciding to rewinding one transformer, there were so many options 🙂
I saw 👀 your video earlier, but I was at work. I understood the tuning drums 🪘, after I watched your part 1 video again. It’s more practical having the dial cord go around a drum 🪘, because of the styling of the radio 📻 dial. The radio 📻 dial is more cylindrical in shape. The drum 🪘 even has the dial light 💡 inside of it. I hope 🤞 ya found the bulbs 💡. Ya must be rebuilding, or putting in the transformer in part 2, which is this video. It also looks like 👍 you’re making some sort of framework 🖼 for your radio 📻. Your friend, Jeff.
Hi Jeff, the drum tuner is a good design and works well. I used the lamps that were in the radio when I got it. Yes, the power supply is in part 2, thanks Jeff 🙂
@@DavidTipton101 That transformer looks pretty 😍 burned 🔥, but you’re doing a great 👍 job fixing it. The wire has to be wound around the transformer at least 1500 times, since it’s as thin as a human hair. Just don’t break it along the way. Your friend, Jeff.
@@jeffreyhickman3871 Thanks Jeff 🙂
That battery eliminator is a work of art Dave!
Thank you Roundy Mooney 🙂
Dave, Sorry for the late reply, stuff. Anyway just a few comments. A purchased P.S. would be too expensive to purchase, WELL If you count your labor cost when making your P.S. that would be many times more expensive than buying a commercial one. I am NOT complaining though, it was fun to watch you build it, pretty much even the transformer, from scratch. Next, I have a little bigger version of that same sheet metal tool. What I did to make it much easier to get accurate bend location is to measure the thickness of your male blade then divide by 2. Use this as an offset for your bend location as it is much easier to line up the bend to the face of the blade rather than trying to see to the point of the blade. NICE job as usual and your high quality shines through as normal. When deburring your drilled holes the drill press works very well for this task as well and I find it easier than using a hand held drill. If you see the need for many more holes to deburr, a "uniflute" chamfer / deburr bit is fantastic to use and will save time over using a drill bit (which worked just fine) I enjoyed the video very much and am looking forward to the final installment on this "farm" radio (battery powered sets in the U.S. were very often called FARM radios as electrification of rural locations lagged the cities by many years here.)
Hi Wayne, you are 100% right, if I counted my labour it would be very expensive. To get a kit to get up near 144V was pretty dear and I would still have to assemble it and make a case, luckley I don't worry too much about the time spent. A bigger version would be very handy and I like your idea of the the sighting line for the bender. Old habits die hard, I have always used a hand deburrer because I normally work with aluminium and a power tool might grab, the steel proved a bit tedious so I reverted to the battery drill. Thanks Wayne, take care 🙂
Very cool Dave - that's a power supply with attitude! It looks nice in black 👍😊
A good attitude I hope, thanks Chris 🙂
Crickey Dave, now you're winding transformers! Is there no end to your skill? Brilliant!
Transformer winding is pretty easy, the hardest part is assembling the laminations again. Thanks Alan 🙂
You can get expanded mesh from Bunnings. It is used to stop animals and leaf litter from getting into your roof cavity.
Can you! I only ever saw wire mesh or punched mesh, which was very expensive 🤔
Wow, what can I say? That was phenomenal mate. 'Rolling your own' transformers, making your own chassis, designing your own regulator, then I just drooled over your metal fabrication machine! I think I'll just get my coat and go home now! I was thinking the very same thing about driving your winding machine via the variac as you mentioned it. Yes, proto board work is ugly but it's quick and effective and after a couple of decades playing with the stuff mine still looks like pigeon poop so don't knock yourself out over it (ha ha). And there's me getting so chuffed up about winding my own little toroid RF transformers and you kick the ball way out of the park. If ever there was Oscar's for TH-cam you would be carrying a gold statue home on the bus mate. I'm not going to sleep until I've seen part three. Take care Mr T.
Hi Stephen, that's quite a wrap, thank you. I'm doing another transformer now, I will see if the winding machine is more controllable using the Variac. Thanks Stephen 🙂
Fantastic craftsmanship, well done sir!
Thank you Voyager 🙂
Hi David - that's a great job! I really enjoyed seeing you rebuild the transformer. My only attempt at repairing a broken transformer winding that was buried inside of "paper and some kind of hard, black goop", was a complete disaster. I made a mess, and bought a new one. The power supply and its case is a work of art. I always enjoy your videos. Thanks again. Jim
Hi Jim, thank you. I had the same gunk in this one, the heat seemed to soften it enough to allow me to unwind it unless you are talking about the ones dipped in pitch. Cheers Jim 🙂
Hello Mr. Tipton. I just finished watching part one of the restoration of your bush battery 1936 radio and loved every minute of it. Wasn't able to catch it when it first came out due to my schedule and your part 2 shows up and puts a big smile on my face. Haven't started watching yet. I first wanted to say
"HI" before I start getting giddy in my chair. You seem to be in better spirits and hope your health is much better. Thank you for your time and patience to entertain/educating people like me in old radio restoration and for keeping the buggers alive a lot longer for people to enjoy. "CHEERS MATE"
Hi Kevin, thank you. Hi 🙋♂️
I'm in good spirits and chuffing along nicely thank you. It my pleasure Kevin, I enjoy making the videos. CHEERS! 😀
Wow David! I'm totally blown away by this one. That bender/cutter is a nice addition. This one had everything. So well done. Thanks. 73 de KB7ICI....Bill
Thanks Bill, the bender and cutter have been a great addition to my workshop 🙂
I am in awe of your skills...One of your BEST!
Thank you James 🙂
Wow, as I said before, you are indeed a jack of all trades! I have made tiny power supplies but never anything on that grand of scale, and it looks great!
Thanks Jerry 🙂
Wow Dave. You’ve done it again. Another awesome episode of ingenuity and brilliant craftsmanship. Not only you were nervous when you finally connected the psu to the radio and tried to flick the on-off switch, I was very nervous too. I wait anxiously for all your videos which are for me the best part to chill on Friday evenings. Brilliant work by all accounts.
Thank you Jamal, I was afraid of damaging the valves and I have no spares 👍🙂
Wow amazing! I love watching your work, a perfect start to the weekend. Thank you so much for your excellent work!
Thank you for watching Mr A Coomber 👍🙂
I didn't even know it was _possible_ for a homemade case to look that great. I am amazed at the outcome. If I did it everything would probably be held in a giant puddle of hot glue.
Haha... that would be a sight eDoc2020. Thanks 👍🙂
That's a lot of work! Lazy me would have used a common 240 to 120 isolation transformer. With a bridge rectifier the output would be 170ish. A crude regulator would give the final 144V.
I looked at 240 to 120 transformers but they were too expensive and I also needed 2 volts for the LT so I rolled my own 🙂
I would have thought that radios would be screened as VK3YE showed that a 1000Khz oscillators can be heard at 1000 Miles away.
Thanks David.
David, absolutely beautiful and outstanding work.
Thank you Dennis 🙂
Incredible meticulous attention to detail! And the patience of Job. Phenomenal work, David! No April Fool here 🙂
Hi Dave, thank you 🙂
Great job David. It‘s always a pleasure to follow your channel.
Thank you Herbert 🙂
Outstanding work Mr. Tipton. You should patent that power unit.
Thanks Bernardo, I think I would be 100 years too late for a patent 👍🙂
@@DavidTipton101 I guess you’re right. Anyway making that unit from zero is outstanding. I’d like to have the skills to do it. 😀
@@nallo69 Thanks Bernardo.
You really have pushed the boundaries on this one Dave. Love the battery eliminator. You are as bad as me as I wouldn’t have been able to resist drilling out the cover. Patience of a saint. That metal cutter, bender and roller looks a very useful machine. I could think of dozens of uses for one so will have to look it up. Looking forward to the finale on this one for sure
Thanks Graham. The holes were a bit small, they looked much better drilled out. The bender etc is very handy, here is the link so you can search close by: www.vevor.com.au/busbar-fabrication-machine-c_10114/vevor-metal-bender-305mm-3-in-1-sheet-metal-brake-folder-roller-bending-machine-p_010565160838?
Using a larger pulley wheel would make the counter run slower, I think. But maybe not slow enough. Perhaps add an idler wheel so you get a two-stage speed reduction.
Hi Nick, I ran it from the Variac and it's pretty good like that. I will look for a sewing machine motor if need be. I thought of a larger pulley but I don't have a big enough piece of round stock🙂
That was very enjoyable indeed, and once again a stellar result. Great job on the power supply! Looking forward to the next episode!
Thank you alpcns. The final part next week 🙂
Excellent video Mr Tipton very informative thanks best regards from England 🇬🇧🇬🇧
Hi Phil in the UK, thank you 👍🙂
WOW just when I'm wondering when part 2 will be ...... voila a notification from you DAVID ........... time to put the kettle on !!!
Cup of tea and a bickie, perfect 🫖🙂
@@DavidTipton101 OH YES ........... its chocolate digestive ... a dunkers dream
@@meichong8278 👍😀
@@DavidTipton101 Well David that was different , informative and very enjoyable !!! A real display of your skill set .... as always David THANK YOU . Can I also ask is there a radio project you'd like to do but availability or cost doesn't allow it ?
Thank you, it was a little different. I don't have any specific radio I would like to do, I do them as they come up 🙂
One of your best videos yet. A pleasure to watch.
Best wishes from Manchester UK.
Thank you Keith 🙂
David, David, David ! You’ll never cease to amaze me, to think you see yourself having a ‘’Lack’’ of knowledge just blows my mind. The end result and performance is fantastic end of discussion. Also (and i know i’ve said this before) your camera work let us see so much details, at times i feel i could almost touch it. Will impatiently wait for part 3 now. Thank’s again for all your meticulous, passionate hard work. Be well mate.
Thank you Raymond. I'm not so good at designing electronic circuits is my weakness but I got through this one OK. It takes a bit longer to set up for camera shots but the results are much better so thank you for noticing. Take care 🙂
Great adventure, Dave. Thanks!
Thanks Fibber's Closet 🙂
Well you made a very proper job of that power supply. The expanded holes look great although I doubt it made much difference to the thermal performance. Thin sheet metal will transfer the heat quite efficiently in its self. You commented on whether the meter was an RMS unit. When measuring DC or sine wave AC an average responding meter will be just as accurate as RMS. It is only on distorted or non sine wave voltages and currents that true RMS meters retain accuracy. Great work and a very enjoyable watch.
Hi Bob, you are right on both counts, the holes may not make much difference and the meters will read RMS by the nature of how they work, I was more intermating that they may not be 100% accurate. Thanks Bob, glad you enjoyed it 🙂
Fabulous! Every detail beautifully done.
Thank you Phillip 🙂
Hello Dave. Great job on the radio and the power supply. You sir are a master. Matin in Chicago.
Hi Martin in Chicago, thank you 🙂
Your talent amazes me, Dave. Great job.
Thank you Phil 🙂
What a superbly executed power supply! Mind you, at the beginning I sort of had a feeling that in the end there would be a gas discharge stabilizer for the HT and a barretter tube for the heater filaments.. Well done Dave
Hi Blitz, thank you. I wasn't too worried about the HT, the LT was a concern if the regulator fails high and I have a few ideas to protect that from overvoltage. Can you still get barretters? they weren't used much over here and I thought they were better for series heater circuits, thanks Blitz. P.S. a special video out next Friday 😉
@@DavidTipton101 There are still plenty of Barretter tube types available here in Europe, but I guess in Australia not so much so, in which case semicondutor solution is just fine I guess. To protect LT output from going high maybe a 250ma fuse and after the fuse 6 x 2,4v zener diodes in parallel as a clamp to ground so diodes conduct if voltage too high and crowbar the fuse..
I can hardly wait till Friday TBH :-)
Thanks Blitz. The smallest Zenner I can get locally is 3.3 Volt, it was suggested to use 3 diodes in series and a fuse which is what I'm am doing now but I'll see if I can get some 2.4 Zeners, they are more predictable. Why a 250mA fuse on a 1 Amp circuit?
@@DavidTipton101 Sorry Dave, was not paying attention and was thinking of the typical heater consumption of those "D" type valves which is not that high. Of course with 1 Amp the fuse would have to be 1250 ma :-) That would mean even more zener diodes in parallel because at those small voltages the most powerful diode available is typically 500mw, and you want to reliably blow that fuse. What bothers me here is that someone once told me to watch out when paralleling zeners because they will not all start conducting at the same voltage, so it could be that one starts conducting, gets overloaded, burns out, next one starts conducting.... etc so it could end up with the diodes going up like firecrackers and the fuse stays intact. Worst case scenario.
Maybe a better idea is to have a zener or two trip the coil of a 2v miniature relay with the contacts crowbaring to ground and blowing the fuse. A second set of contacts could bridge the zener once coil is activated and reliably latch the relay. Maybe this is the safer option.. Also, a zener triggering the base of a transistor to short to ground may have been an option, but with the C-E voltage drop of 0,7v per junction makes me uneasy at such a low supply voltage, and a mosfet is of course out of the question.
Anyway, just some thoughts there...
@@blitzroehre1807 I looked up 2.4 zeners and as you said they are only 500mW and I thought the same that they may go one at a time. I ordered 1.25 A fuses with the diodes. I went back to the series diode idea but the relay is even better, I will try that out. Thanks again Blitz 👍🙂
Thanks David! You really got me this time, I have to rewind a transformer and build a machine for that, it's all in my head but sometime..... Very god input.
Excellent work and nice new toys in the workshop. I could also turn on the subs, perfect.
Hi Leif, yes, I lifted the text above the subtitles as you suggested, thank you for telling me. The winding machines on ebay are cheap and have a counter, the hand powered ones are even cheaper. Nothing better than a new toy 😉🙂
@@DavidTipton101 I have to check whose machins out it woul'd be easier but it is a little bit fun to build or not...
@@DavidTipton101 I get hand wound winders and hand paper shedders muddled up. Causes a lot of confusion.
I hope you got your transformer wound Leif. This comment just showed up after 2 years 🤔🙂
David,regarding the coil rewind, you would have been very handy during the Apollo 13 drama! Great to see your analytical skills at work.Inspiring!
Haha... they had enough to worry about without me there, thanks Emily 😄
Loved the maths in the transform mod. And great work on the power supply build. You have way too much patiences, I couldn't drill all those holes without lots of coffee or alcohol. Cheers
Thanks slypig24. Haha... that's what was missing, alcohol! In part three I get to drill more holes 🙄🙂
Haha, Dave always going the extra 10 miles to make a perfect project!
I'm getting tired just thinking about it, thanks Daniel 🙂
Brilliant work Dave, "better than factory". Loved the DaveDee bit.
Haha... thanks Len 🙂
Fantastic work David! I really get so much pleasure from watching your videos.
Thank you Paul 🙂