How to Check the B+ Safely - Tube Radio Restoration Back to Basics part 3
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- Опубликовано: 1 окт 2024
- A successful tube radio restoration starts with ensuring that power gets to all the right places. In this video we'll see how to do that safely - without powering up the radio.
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? ●●●●●●
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#tuberadios #antiqueradio #radiorestoration
●●●● HUNDREDS OF OTHER VIDEOS TO CHOOSE FROM ●●●●
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• Zener Diode Tester - P...
✿ RESTORATION BUILDING BLOCKS: A series of videos showing detailed steps used the restoration process of tube equipment:
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✿ HowTo's: Various videos on some simple techniques and projects:
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✿ DIY CAPACITOR LEAKAGE TESTER PROJECT: One of the most viewed projects on my channel, with full design description and build instructions.
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Наука
It does not get any better than this! This is exactly what people need and is what RUclips is all about (in my opinion). Thank you sir!
My pleasure
New radio hobbyists will get a lot from this Manuel 👍😀
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Brilliant explanation, clear and easy to follow. I really appreciate that you are taking this time to demonstrate a logical way to perform important tests, even before power is applied. Well done sir.
Lynton G4XCQ
Thank you Lynton. I’m actually enjoying this process
When restuffing capacitor, you can anneal aluminium which will make bending much more easier and look better. I also do that to speaker grills on those small tabs that usually very easily break. Annealing makes it soft and maluable. Again very nice video. Cheers 👍👍👍
Good tip 👍
The proces is very simple. When you emptied shell of capacitor, use sharpie and draw circular line on the edge. Then use those small brenner lighter and heat the edge until sharpie line disappear. Let it aircool and then you can bend it like aluminium foil. Don't be scared that you ruined it because the minute you start shaping it, it will stiffen up. Hope i have helped.
I’m going to give that a try 👍
This is perfect timing. I am restuffing 2 capacitor cans today. This gives me more ideas as to how I want to do that. Also, I have found that many times the ESR appears low because the cap is so leaky even at the low test voltage.
One of the cans I am restuffing today had 5ma of leakage at 15 volts. it was rated for 450 volts. I slowly ramped the voltage up to the rated 450 volts as the leakage current went down, allowing the cap to reform. Then held that voltage for two days. Discharged the cap and applied voltage 1 day later and it was just as leaky as when I started. Definitely couldn't save that one.
Most of them are t worth trying to reform as they do exactly that, unfortunately.
I'm wide awake and sitting in the front row to learn as much as I can from all this. I like your new approach to showing us how to go through a unknown radio to find out what is right and wrong with it.
Thank you very much and looking forward to the next installment!
Good to know you’re enjoying it 👍
I find this confirmation testing interesting. It also teaches you about the circuit and gives you a idea about the health of the resistors. Well done Manuel
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Mni tnx for this series dr.Manuel. (and i thought i know "everything" 🤔)
I always watch your videos, and can confidently state that, compared to me, you probably DO know everything 😊 Some of the projects you take on are a great source of learning for me too. Thank you.
Thanks for sharing your knowledge
Pleasure
Manuel , this chassis carries 150micro F quite big elco capacitor,which is the total current amount at full power?.
Thanks in advance
I believe it mentions about 100mA on the schematic
Brilliant!!! I can't tell you how long I've been hoping someone would make a series like this. As you yourself say - so many people assume a rather high level of knowledge in their videos. This series is pitched at exactly the right level for the beginner.Great videos, really well explained. Thank you so much for making the not inconsiderable effort to produce these fantastic videos - and thanks so much for sharing your knowledge and experience.
My pleasure
Hi Manuel, it was absolutely not boring at all, I found it quite interesting and your method of replacing the capacitors is also very elegant. Not only the fact you kept the can but more so the way you made de safe connections. Great job. I also find your way of checking the B+ this way and color coding the schematic very useful. All in all, very awake and not boring.
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12:33 I am very impressed!! You're the only one I've seen doing this and it seems you've become very handy at it!
You should try to find a bent owl (perhaps a dentist tool?) to avoid keep poking your hand with the screwdriver.
You know the lip on these is formed using rollers, right? I was wondering whether a similar contraption with a tiny roller could be invented, similar to a can opener, that can undo the lip, like you're showing here.
I’ve tried various methods, and always revert back to this rather crude method. Won’t stop looking for a better alternative, though 😊
Good, methodical progress. At least 3.17% of us are still awake.
😊
Well, after working in electronic repairs for over 50 years I today learned from you something brand new! The wrapping of the jumper wire first around a small screwdriver to make a coil that generates a lot of contact surface to attach the capacitor leads was and eye opener!! The soldering now is much stronger and you get a lot of contact wire to carry a sizable current. Good job!
Thank you 👍
Seen it before on your channel - BUT its good to do it again as it builds confidence. Thanks Manuel.
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You might want to watch a recent episode of Mr. Carlson's Lab where he explains why he often uses a pipe cutter to split a can rather than mess with the folded lip.
he did mention that as an option. Many people that do not do home plumbing, won't have a pipe cutter, and buying one for the few times that we would use it, is not economical.
@@davidhamm5626 You might want to view Mr. Carlson's episode yourself in order to realise why I suggested it. There is not a right or wrong way just alternatives.
@@daveturner5305 Okay, I have used many methods, including that one on the cans. I still know people that do not have a pipe cutter, or a hack saw, and that buying one just to do these things, once in a while, does not add up.
Do you have these items?
@@davidhamm5626 In a lifetime of various DIY projects one collects many tools. So yes I do.
the method manuel showed is better for this type of capacitors...
I like your method as it holds true to the display of the genuine parts used back then.
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11:31 This is when having two right hands comes in very handy (pun intended).
😊 yes, that edit does look weird
Your Videos are so great! Thank you so much!!
My pleasure
What more is there to say? Excellent video and series!!!
Thanks
thank you so much Manuel, you are pure gold.
My pleasure
Making some great headway!
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Thanks 😊
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Hi, nicely done and explained, I am fitting a 100nF ceramic capacitor to the rectifier, the electrolytic capacitor does not filter the rectifier noise.
Edit: I primarily test capacitors at their operating frequency.
Nice day 🙂Tom
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Hey - you say "B2plus" and "Bplus" for what stand the letter "B"?
It’s the main positive supply, derived from when these radios were run on batteries, hence the “B”
RUclips translate tool: Found the Google translator tool under More, does that translate to the viewers native language? I heard rumor that Google was implementing a tool that would allow a viewer to heir and see a video made in one language automatically be translated the voice into the viewers native language. That might get your viewership high enough for your daughter to do an intro.
😊 I still haven’t checked it out properly, but my daughter won’t need the translator. She’s quite fluent in English.
Yes my comment was off topic, and no way helpful to those future radio technicians to mastering the obscure art of German radio restoration. I do however think your daughter may need small animal language translations. Enjoyed his as usual
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