You are absolutely right to be careful with the mains; it may not give you a second chance! I'm 61 and very aware that I'm slowing down a bit. A good habit to get into, apart from checking everything twice before plugging in, is to put one hand in your pocket, so if you do accidentally come in contact with it, you lessen the chance of the current going across your chest. Great video :-)
capacitor is completely kaput :-) Your german gets better ! I'm 65, and have the the same problems with mains lines. So my new iso-transformer has in the input part a double automated fuse, an emergency switch (usable with the fist) and a main switch. Now you can call me paranoid.
Alfred Neumann : Danke. You can never be paranoid... only careful.
5 років тому+2
Same here 53, dimbulb/isolation, but still nervous (or careful?) with mains (and gear?) and that I could hear a bang from a capacitor, which rarely did made a bang in my past electronic years, so very funny and satisfying to see there are more people out there.
As a fellow electrical engineer (roughly the same age too) I would say that, if you had left the power on while messing about it it, _then_ you could call yourself an idiot. As far as I can tell, you are doing it by the book, don't be so hard on yourself. I like the radio, looking forward to how it works _when_ you fix it :) Cheers,
Here’s a joke we shared at university: electronic engineers are guys who were too afraid of high voltages to become electrical engineers :) In South Africa we had the two courses that flowed together and then split after the third year.
Looks a lot like my attempts at restoration lol. I always have trouble at the first fence, but then it gets easier. I too am very nervous around high voltages. Better safe than sorry. I have every confidence you will be successful. Lynton
Nice first part Manuel. I know exactly what you mean about Fluke. Once you have one, you never want to be without it. I also have my original Avo 8 as well for those times when analogue is better than digital. At least you got a successful first power and the output transformer seems good at this point.
I also have two Avo 8’s. More for the nostalgic moments. Actually I’m inclined towards the Brymen 869s. Great features and way lower in price that the fluke.
I was lucky this week. I found 3 used flukes in a box at an auction. Not tested them fully but I paid less for the box of stuff than It costs for a quarter of a fluke. If I get one good one out of the 3 its a winner.
Hello! Thanks a lot for sharing this kind of contents. I have a question about the death cap. Why do you replace instead of remove it and install a three cord cable with earth to the chassis? I understand that you use a safe capacitor, but wouldn't be better to have the chassis to earth? Thanks again. Greetings from Germany
I usually replace it to filter noise on the mains line. Using a three-wire cord to earth the chassis is great for safety, but doesn’t replace the function of the cap.
@@electronicsoldandnew Thanks a lot for de answer. I follow other person who fix guitare Amps and they remove the cap for safety. I understand the difference now and why you replace the cap. Didn't know about line noise. I am currently restoring a Loewe Opta Apollo 4760w. I found this videos quite useful. Thank you very much!
just one question if you don't mind........how much ripple would be acceptable normally ......and if it it's high is it due to bad filter cap? thank you....great videos by the way
@@electronicsoldandnew No Manuel, I am Dutch. I would also like to tell you that I find your videos incredibly interesting because you perform the restorations with such dedication. I have tried a Grundig 3028 myself, but I have not yet had the courage to tackle the alignment. Maybe I should just keep on looking to your videos. Keep it up and good luck.
That was my first thought too. Those selenium rectifiers are quite often the culprit. I have several of them in my junk components box. Hurrah for Silicon!
M Caldeira, I like your videos, their are very instructive, but the "Subscribe" banner is very annoying. Its Ok if you put it once, near the end of the video like the other UA-camrs. Thanks.
No. I’m a perpetual student (56 year old student), who suffers from the bug of learning new things all the time. My university dean once told us that what we’d take from the degree would be the ability to learn. At the time we were all a little demoralised because we believed we’d leave university with all the knowledge in the world. As it happens, knowing how to learn was much more useful :)
I’ve learned far more on UA-cam from people like you, than I ever learned in two years at Uni studying Electronics Technitian. I took the communications stream and they didn’t even teach us alignment in the Receivers and Transmitters subject.
I also do a bit of ‘day work’ or my company would go bust. But living here is quite a privilege, and being able to follow my passion for electronics after finishing my degree over 30 years ago is a real pleasure. PS: my brother lives in Haywards Heath, so I get regular complaints from him too :)
As I said to Rod, Uni teaches you how to learn, which is a great gift, but doesn’t really have the time to teach you too much else. Thanks for watching.
You are absolutely right to be careful with the mains; it may not give you a second chance! I'm 61 and very aware that I'm slowing down a bit. A good habit to get into, apart from checking everything twice before plugging in, is to put one hand in your pocket, so if you do accidentally come in contact with it, you lessen the chance of the current going across your chest. Great video :-)
Alan Cordwell / thanks Alan.
capacitor is completely kaput :-) Your german gets better !
I'm 65, and have the the same problems with mains lines. So my new iso-transformer has in the input part a double automated fuse, an emergency switch (usable with the fist) and a main switch. Now you can call me paranoid.
Alfred Neumann : Danke.
You can never be paranoid... only careful.
Same here 53, dimbulb/isolation, but still nervous (or careful?) with mains (and gear?) and that I could hear a bang from a capacitor, which rarely did made a bang in my past electronic years, so very funny and satisfying to see there are more people out there.
Great to see methodical troubleshooting of old valve radios.
As a fellow electrical engineer (roughly the same age too) I would say that, if you had left the power on while messing about it it, _then_ you could call yourself an idiot. As far as I can tell, you are doing it by the book, don't be so hard on yourself.
I like the radio, looking forward to how it works _when_ you fix it :)
Cheers,
Here’s a joke we shared at university: electronic engineers are guys who were too afraid of high voltages to become electrical engineers :)
In South Africa we had the two courses that flowed together and then split after the third year.
Very nice done ,thank you
Looks a lot like my attempts at restoration lol. I always have trouble at the first fence, but then it gets easier. I too am very nervous around high voltages. Better safe than sorry. I have every confidence you will be successful.
Lynton
I try to temper my confidence to avoid getting zapped too often :)
Thanks
Great.Thanks👍
Nice first part Manuel. I know exactly what you mean about Fluke. Once you have one, you never want to be without it. I also have my original Avo 8 as well for those times when analogue is better than digital. At least you got a successful first power and the output transformer seems good at this point.
I also have two Avo 8’s. More for the nostalgic moments. Actually I’m inclined towards the Brymen 869s. Great features and way lower in price that the fluke.
I was lucky this week. I found 3 used flukes in a box at an auction. Not tested them fully but I paid less for the box of stuff than It costs for a quarter of a fluke. If I get one good one out of the 3 its a winner.
Hello! Thanks a lot for sharing this kind of contents. I have a question about the death cap. Why do you replace instead of remove it and install a three cord cable with earth to the chassis? I understand that you use a safe capacitor, but wouldn't be better to have the chassis to earth? Thanks again. Greetings from Germany
I usually replace it to filter noise on the mains line. Using a three-wire cord to earth the chassis is great for safety, but doesn’t replace the function of the cap.
@@electronicsoldandnew
Thanks a lot for de answer. I follow other person who fix guitare Amps and they remove the cap for safety. I understand the difference now and why you replace the cap. Didn't know about line noise. I am currently restoring a Loewe Opta Apollo 4760w. I found this videos quite useful. Thank you very much!
@jjnicola : my pleasure
just one question if you don't mind........how much ripple would be acceptable normally ......and if it it's high is it due to bad filter cap? thank you....great videos by the way
Theoretically with zero load you should get zero ripple, so something is fishy here. We’ll see as we go along.
@@electronicsoldandnew thank you
I'm 57 but I'm also pretty nervous when I'm playing with mains. haha. I think it is a good thing..
When you survive a few shocks, you learn! By the way, the only other Wynand I knew was South African. Is that the case with you?
Me too, 55. The very fact that we are still alive and playing around with mains is vindication of our extreme caution.
@@electronicsoldandnew No Manuel, I am Dutch. I would also like to tell you that I find your videos incredibly interesting because you perform the restorations with such dedication. I have tried a Grundig 3028 myself, but I have not yet had the courage to tackle the alignment. Maybe I should just keep on looking to your videos. Keep it up and good luck.
Is it possible the selenium rectifier is leaky causing that high AC reading ?
Yeah it's probably leaking some reverse current... Maybe that's what killed the cap too
THAT is my fear exactly. Because I’ll have to remove the filter caps I replaced to get to it. We’ll see.
That was my first thought too. Those selenium rectifiers are quite often the culprit. I have several of them in my junk components box.
Hurrah for Silicon!
"Here goes nothing!" He've all done that :) that's alot of trouble to avoid damage to the set . Some people jump right into the smoke test.
I do this because it’s a hobby and not a profession. In a work situation, a tech wouldn’t be able to afford the time to do things this way.
When you are trying to do it the right way and to keep as much original parts as you can, that's the way to go. Not burning stuff to save time.
M Caldeira, I like your videos, their are very instructive, but the "Subscribe" banner is very annoying. Its Ok if you put it once, near the end of the video like the other UA-camrs. Thanks.
Are you a teacher by profession?
No. I’m a perpetual student (56 year old student), who suffers from the bug of learning new things all the time. My university dean once told us that what we’d take from the degree would be the ability to learn. At the time we were all a little demoralised because we believed we’d leave university with all the knowledge in the world. As it happens, knowing how to learn was much more useful :)
I’ve learned far more on UA-cam from people like you, than I ever learned in two years at Uni studying Electronics Technitian. I took the communications stream and they didn’t even teach us alignment in the Receivers and Transmitters subject.
Live in paradise and attend school every day!!! Where do I apply? PS 31C here in S. UK to-day
I also do a bit of ‘day work’ or my company would go bust. But living here is quite a privilege, and being able to follow my passion for electronics after finishing my degree over 30 years ago is a real pleasure. PS: my brother lives in Haywards Heath, so I get regular complaints from him too :)
As I said to Rod, Uni teaches you how to learn, which is a great gift, but doesn’t really have the time to teach you too much else. Thanks for watching.