The Parts That Make Up a Tube Radio - Tube Radio Restoration Back to Basics part 1
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- Опубликовано: 29 мар 2024
- I initially learnt about restoring tube radios by watching RUclips videos produced by some really knowledgeable creators, who selflessly shared their extensive knowledge on the subject with enthusiast like myself. My education in Electronics is from the era of the integrated circuit, so, while I had the theory, my experience with tubes was non-existent.
Having posted over a thousand videos on the subject, I recently found myself glancing over details during the various stages of the procedure, assuming the viewer knew what I was talking about, rather than actually explaining the process. This is something that used to annoy me when I was starting out, so I was becoming guilty of doing precisely that which hindered my learning experience at the outset.
The purpose of this series is to go back to the basics, explain in detail every step of the procedure. My hope is that it serves as a reference for those who are starting out in this fantastic hobby, and encourages many to try it out for themselves. Whether I achieve my goal is uncertain, but I'm going to give it a try.
I hope you enjoy the series, and invite you to comment.
🎥 Other videos in this series:
■ Back to Basics 1 - Tube Radio Anatomy: • The Parts That Make Up...
■ Back to Basics 2 - Tube Radio Anatomy: • Checking the Power Sup...
■ Back to Basics 3- Follow the B+: • How to Check the B+ Sa...
🙏 Want to support the channel? ●●●●●●
/ mcaldeira
paypal.me/macaldeira
#tuberadios #antiqueradio #radiorestoration
●●●● HUNDREDS OF OTHER VIDEOS TO CHOOSE FROM ●●●●
✿ DIY TEST GEAR: The title says it all:
• Zener Diode Tester - P...
✿ RESTORATION BUILDING BLOCKS: A series of videos showing detailed steps used the restoration process of tube equipment:
• How to safely check th...
✿ HowTo's: Various videos on some simple techniques and projects:
• Extend tube radio FM b...
✿ DIY CAPACITOR LEAKAGE TESTER PROJECT: One of the most viewed projects on my channel, with full design description and build instructions.
• Capacitor leakage test...
✿ DIY TUBE TESTER PROJECT: Complete design description and build instructions for this really handy device.
• DIY Tube Tester. Worki...
●●●● Plus full Playlists on some other completed restoration projects on this Channel ●●●●
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• Philips BX750A tube ra...
📻 TELEFUNKEN OPUS 2114:
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📻 SABA UW-175-Z 3D:
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📻 GRUNDIG 1070:
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📻 SCHAUB-LORENZ GOLDY 58 type 3020:
• Schaub-Lorenz Goldy 58...
📻 BUSH VHF64:
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📻 GRUNDIG 3060A:
• Grundig 3060a tube rad...
📻 TELEFUNKEN OPERETTE 8:
• Telefunken Operette 8 ...
📻 GRAETZ SUPER 171W:
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📻 LOEWE-OPTA MAGNET 3737W:
• Loewe-Opta Magnet 3737...
📻 BRAUN ATELIER 3:
• Braun Atelier 3
📻 LOEWE-OPTA TRUXA STEREO 4741W:
• Loewe-Opta Truxa Stere...
📻 GRAETZ COMEDIA 616:
• Graetz Comedia 616 tub...
📻 SABA FREIBURG W2:
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📻 GRAETZ MUSICA 4R417:
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Thanks for putting this series out, it'll be very useful to many of us.
My pleasure 👍
When I was 9 yrs old in 1956, I was repairing TV's for my neighbors. At that point in life, I knew I'd want to be involved with computers, which I did when I got into High School. I read everything I could get my hands on. So, while in the Army, I ended up teaching: HAM Radio, Telephone Systems, Microwave Propagation, and Basic Electronics. While in the Army, I got my Electrical Engineering Degree. Then, after 40 years in the Network Industry, and retired, I was thinking what should do now? Then I remembered my young years. I decided to setup a shop and start restoring old Tube Radio's and old Tube Test Equipment. Since electronics came so easy to me, repairing these old Tube device's came easy as well; and that was 14 years ago. So, in short, I've found this so relaxing, and fun to do!
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So as for what you're doing, this will help new people wanting to do this hobby, and you always present material in a logical order. 👍
Keep up this series of information. I know it will help someone!
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There are so many YT's out their that DO THIS WRONG! So your efforts are greatly appreciated.
Thanks for the support. Like you, the logic of circuitry comes naturally to me, as I’ve built up almost an instinct for what’s going on in the circuit, but I do realise that not everyone is there yet (and I’m sure there’s a lot I’ve still not come across myself).
Thank you very much for these videos. They are giving help to people like me, to get involved with the old radios and have a good start. Looking forward to your next video !!!
My pleasure
So pleased you’re doing this Manuel, thank you.
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So you,r not a Medical Doctor , a Vet , or a Dentist ,you are a Born Genius , That is the best Explanation ever of how a radio works ,Thanks , must view it Again .
😊 thanks
I watch you as I'm fascinated by what you do and how meticulous you are in your resolving the problems.
I cannot say the same for any of the other restorers.
Good job!
Keep it up!
Happy Easter!
Thank you
Oh man!! I needed this. Been watching your channel for a few years parked up in the lorry (tonight in Saltcoats, Scotland).
Ive picked up so much from you ... selenium recitifiers/silicone diodes, restuffing etc but only did these things because you did it. Not knowing why or what some components actually do ... like what does the mixer valve actually mix etc.
I also have had loads of daft questions that I usually Googled but got too many complicated answers so gave up and enjoyed the ignorant bliss.
This series is going to help me out no end.
I found it interesting but not suprising that you stated at the start of this video that you felt maybe you were glossing over the simple stuff some of us mere mortals were clueless about, I have to commend you on your self awareness there ... not many would consider that. You Sir are an excellent teacher and the joy you gain in restoring these German radios is obviously infectious.
On behalf of us rank amateurs .. thank you.
Mark
Thank you for the kind words Mark. We all started out with a learning curve, so I understand your frustration as I have been there myself. With some experience it seems simple, but did not start off that way. Hope the series helps you further along the path.
Wow...Just what I need ..! Looking forward to the series..I need help..Thanks for sharing your knowledge.. 👍 Ed..UK.. 😊
My pleasure 👍
I can honestly say that most of the knowledge I have now came from watching your channel. I laugh now when I think of some of the silly questions or comments I made in the early learning days, you were always kind and probably amused as you responded with a smiley face.
Well, I’ve gone from a complete novice to restoring the most complex of radios such as the Saba Freiburg with your help. You don’t know me, I’m just an Aussie bloke who spends his time prospecting for gold in the outback… but I know you well. Thanks for bringing so much joy to my hobby.
It’s a pleasure hearing that I’ve inspired someone else to do this. As for my amusement, I must admit that I probably caused some myself on the face if others when I was asking the simple questions 😊
Im in the same boat as you BigKev. Im a trucker back in England and take bits with me to do at night in the truck when Im parked up in Europe or Britain.
Theres you Gold prospecting in the outback and me in a lorry in Scotland .... both watching Manuel and hoping one day we are as knowledgable ... its great world sometimes eh mate.
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Excellent and complete explanation. I enjoy learning how these radios work as much as I do repairing and listening to them. A non functioning 1950s radio, for me, is the ultimate puzzle to understand and restore.
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Thanks for the starting this series. It's always good to learn more from others, see how they approach it, and see if that helps my workflow and understanding which will help me get better.
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Very valuable video - thank you!
Pleasure
No university, no vocational college will teach this kind of technology. Thank you explaining the fundamentals of tube radios. Looking forward to your upcoming videos in this series. Thanks again for sharing your knowledge,
Pleasure
Köszönjük szépen, ez nagyon hasznos sorozat lesz!
Hey Manuel, this has been a very interesting and informative video. I'm looking forward to the next episode in the series!
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Excellent! Very clearly explained and presented. I very much liked the way you stepped through the schematic. That was really good and nicely done! 🙂
Thanks 👍
Manuel, you should write a manual. :) Looking forward to these two parts. Also how you will replace that lovely dial glass.
😊 I have a cunning plan
You are one of the best teacher.
Thanks
Thanks for taking the time to make this video, its all the little tips, like breaking the schematic down that helps newbies like me, that desperately want to understand but as you say, it just becomes overwhelming.
Love the channel but im glued to the notifications to wait for the next in the series. Cheers, Darren.
P.S. I have my gears ordered from PCBway, for my Sony CRF 320, theyre sitting at the post office, who dont re-open until Wednesday, here in Australia. I could have been fitting them whilst i have a few days off work! Gives me time to go over you're very informative 320 series once again!
Cheers
👍 what a shame the gears order didn’t arrive before this holiday. I understand your frustration.
Thanks. Electronics videos, interesting as they may be, can lead into another Universe which isn’t exacty necessary information for people interested in enjoying repairing old radios they've collected or rescued.
Thank you for explaining this is detail for us. I do believe it can give me more confidence by knowledge when working on these radios. One request. Please repeat a quick description of the separate building blocks of the radio at he beginning of a new video. Its the power of repeating that helps remembering
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That was a lot of work on your part Manuel, Well done 👍😀
Thanks Dave
Hi, great initiative, thanks for the drawing utility suggestion. Translated directly with Deepl (Librewolf).👍👍👍
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This will be a great series for novices into the restoration of tube/valve radios but also basic tube/valve audio equipment. This particular case is not a great example for this but given the chance you should also devote some time to point out dos and don'ts for cleaning up a radio chassis. Usually the chassis cleaning is one of the first tasks that a restorer will have to perform but there are quite a few risks attached to this process. In particular, as not all radios are constructed the same way, these risks can differ greatly between different radios. Along with the cleaning of course comes a first inspection of the circuit and identification of possible damaged components and danger areas.
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Muchas gracias por poner esta serie de videos, hace tiempo que me aleje de su contenido, (Ud. mostraba lo que hice y no porque se necesitaba hacer sin ninguna explicacion), eso a mi no me ayudaba, la explicacion que usted da en este video es muy util y me va a ayudar tremendamente, me voy a subscribr de nuevo, muchas gracias !!
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This is a fantastic idea (the video series). I really wish you would've picked a radio that was much more simple to start with instead of a multi-band one with lots of complexity and a schematic that's in German though... but that's just my opinion... it's your series so you approach it however you like. I'm glad you're doing it anyway. It also might be a good idea to explain what a tank circuit is if you're going to use that term. Looking forward to more videos in this series!
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Great video! I'm glad the algorithm recommended your channel to me.
So am I
Nicely done Sir.
Thank you
Just what I've been wating for. Really going to enjoy this series. Thank you Manuel.
My pleasure
Great new series. Just recapped a Normende Sterling Turandot. But the FM dial indicator is off a bit. Hopefully you will address this in the series.
All will be covered 😊
Many thanks, that's an excellent video as usual! You have a great balance between keeping the pace and spending time to repeat the important points. Looking forward to see this video at the top of a playlist "Tube radio restoration basics"
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Thanks you Manuel. Great series, perhaps I will finally figure out where my Philips FM sinal is getting lost.
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Very good idea and thank you very much appreciated.
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6:05 This is true up to a point. If you destroy an older transistor circuit, there are a few aspects to consider:
a) There are many transistors that are irreplaceable because they are either no longer manufactured and very hard to find or are just so obscure that even datasheets for them cannot be found. In many cases equivalent transistors simply do not exist. (In such cases you do not even want to buy the piece in the first place unless you decide to so with the knowledge that you cannot use without taking certain precautions.) There are also many cases where the transistors may have been purposefully re-labelled by the manufacturer so that the end-user cannot tell what the exact part is and has to go through the service department of the company that produced the equipment (which may no longer exist).
b) As a rule, transistor circuits contain many more active elements than valve circuits do, for the simple reason that transistors are cheaper but also, in some cases, less linear. So when a fault in a transistor circuit occurs, it can often be the case that more than one active element goes out.
c) Unlike tube circuits, transistor circuits have invariably their active elements soldered on a board. Therefore testing a transistor (or more than one) can be a much more labourious affair with its own inherent risks.
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You made a new Jig!
Yes
Excellent 👌🏽
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Great explanation. As you continue your migration towards the UK you will, of course, need to refer to tubes as valves, ho, ho.
True 😊 Ironically, my South African education should have instilled in me that choice, but for some reason I’ve gone the other way 😊
Thanks for this vedio.I hope you make videos on tube television repair
Unfortunately I haven’t gone into TVs. Quite honestly, the voltage levels scare the hell out of me 😊
I can remember my apprentice days in the 70's and the instructors breaking up the circuit parts in this way. It works very well and even now in retirement, also restoring radios as my hobby, I can readily identify the parts looking at the chassis.
This video is very good at starting someone off in this process. But, just an idea, In some of your previous videos you have shown the scope screen as an inset video. Would breaking up the circuit diagram in its various stages and insetting the PC video out as you show each physical location of the stage on the chassis possibly make things even clearer to some?
That’s a good idea. I’ll give it a try going forward. Thanks.
Great stuff sir. I am sure this will be very helpful to many people.
Lynton G4XCQ
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iam 80% self taught and theres one thing i cant understand about superhet and seems to never be mentioned, not even in books is why the local oscillator amplitude effects the signal level recieved
i would have thought that the oscillator is just for frequency convertion and the i.f. stage is amplifying the incoming radio signal at its own amplitude just carrier frequency shifted with the oscillator + its harmonics is filtered out at the i.f. cans , but in practice a weak oscillator causes a weak reception ! so wierd ! oh and agc feedback was confusing too until i started playing with opamps
If you look at the math involved in the mixing process, both signal amplitudes come into the equation.
@@electronicsoldandnew ah theres the problem with my hole in knowledge ! , i totally lose interest at the math haha
Believe me, you’re not the only one 😊 the math for a mixing stage is horrendous 😊
Off-topic, are you tempted to emulate x-ray Tony's new camera system.
Not really 😊 I saw his latest video and could feel the frustration he was experiencing 😊 I do want to get a couple of small good quality cameras for secondary angle shots and close-ups like Dave Tipton has. I like the idea of aligning multiple clips together and then editing the shots myself in DaVinci Resolve. It’s easy and reversible, so will work better for me.
Right now I only use one iPhone, so changing angles requires me to “continue to flow of dialogue” with breaks in between, which sometimes doesn’t really work out 😂
This all seems to make sense in your head. Too bad about the rest of us. I'm not giving up. I'll watch to see if you get a sense of how to teach.
Actually, I have a better idea …. Make a few videos yourself so that I can get a sense of how you teach, and perhaps improve my methods.
@@electronicsoldandnew I'm not a good teacher. I know my limitations. But I wish you were more self-aware. I get it that you are brilliant and understand how to work through restoring vintage radios. Too bad you are not able to relate to the rest of us. I wish you all the best though.
that schematic is really not great though, the 1st i.f. primary is shown upside down ,as in the ht voltage is fed in the bottom and the (slightly) lower voltage anode connection is at the top , then they mix 2 different cathode symbols, uk conventional half circle at front end then just dots at af detection and output stages i guess thats american? and youd have to be knowlegable to see the eabc80 symbol is 3 diodes and a triode, and that el84 symbol is a complete mess! they bypassed convention of showing internal straps down the sides no lets stick it through the center! its like a brit did the front end the rest is an american haha
Those are the challenges we face when working with these schematics 😊 And often there are errors in there, just to keep you on your toes 😊
🤔 'Promo sm'
Back to basics? Playing with colours on a schematic may be a good guide, but it takes more than that to start repairing radios. Without a thorough knowledge of basic electronics this hobby will forever be off limits. Buying a copy of Electronics for Dummies and toiling yourself through it seems inevitable. There is a whole new language to be learned, dozens of symbols to get acquainted with and lots of math. In short, this is not a hobby for everyone.
Noted
I’m not totally sure which audience you’re intending this comment for. But the vast majority of the people that follow him, know it’s not “colors on a schematic.”
Regardless, if you watched the video, you would recognize that this video is being made to speak to the person that was just like him when they first started out. Gate keepers who speak like you have deterred curious minds and its channels like this, w2aew, Paul Carlson, The Radio Shop, and literally countless others on RUclips that gave us a starting point.
I started learning the electronics craft from RUclips 12 years ago. Videos just like this gave me the push to go back and learn the fundamentals and next year I’ll be finish my degree in electrical engineering. But long ago colleges and trade schools stopped teaching analog circuitry at this level. Tube circuitry alone is a paragraph in a chapter of a 4 year program.
We’re lucky to have them and lucky that they let us look over their shoulder.
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Back to basics? Really? You come off as a guy who knows way too much but doesn't really understand how to communicate down to the level of people who are starting out at a basic level. It's difficult to teach. It takes a special level of skill and ability to get into other peoples heads that unfortunately you don't seem to possess. Thanks for trying though.
I’m well aware of my shortcomings, and convinced that I’ll never get through to everyone. I’ll give it a try anyway 😊
@@electronicsoldandnewHonestly I think you will only get through to those who already understand how to do this. The hard part is getting through to the rest of us.