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Can't find these components...

Ben Thomas

Ben Thomas

New Member
So I've become sort of infatuated with old record consoles and portable record players and now have 5 project pieces; 2 Sears Silvertone portables and 3 consoles. I'm starting with what seems like the easiest (the smaller Silvertone) and would like to replace the 2 caps and transistor, but after searching and searching cannot find replacement components with these ratings. Can anyone give me some advice?

Caps:
Tubular .02 mfd., 400 V
Electrolytic, 20 mfd. @ 25 V (A); 20 mfd. @150 V (B); 40 mfd. @ 150 V (C)
Tubular .06 mfd., 200 V

Transformer: 150 ohms D.C. primary resistance, 1.6 ohms secondary impedance

Thanks for any help you can give me (my first post too)!
IMG_20150911_203857545.jpg IMG_20150814_180143700.jpg
 
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You'll have to sub some modern values in there. They changed the sizing sometime in the 1970s.

Tubular .02 mfd., 400 V - these would be replaced with a 0.022uf 400v or higher. 630v might be the logical value.

Electrolytic, 20 mfd. @ 25 V (A); 20 mfd. @150 V (B); 40 mfd. @ 150 V (C) - multisection cans aren't really so common anymore. I'd use a 22uf 25-50v cap for the first section, a 22uf 160v for the second, and a 47uf 160v for the third. These would be individual caps, mounted to a terminal strip underneath. If you can't get that in there, probably https://www.tubesandmore.com/products/C-EC20X3-350 would be the closest thing. Tie two of the 20uf sections together to make the 40uf, and you'd still need the 22uf @ 25-50v as an individual cap.

Tubular .06 mfd., 200 V - use a 0.68uf 250v or higher.


Is the transformer bad? They rarely fail.
 
A JJ 40/20/20/20 uf @ 500v cap can + mounting clamp would cost half as much and provide all three needed sections. But make sure it isn't too fat to fit there.
 
That JJ cap would make life easier--an important consideration. But it would cost a lot more than the individual caps mentioned by gadget, at least it would here in the UK. And you'd still need the tubular ones as well.
 
I use multisections when I need them for space reasons. Sort of hate doing it for cost reasons but once in a while you're stuck with it. I do generally use the clamp-in when I need one though, much more price friendly.
 
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