10-09-2017, 09:07 PM
> We'll test C-17 and 18, and see what we find.
Would bother just replace. I'd be willing to wager that C-17C is shorted and that's what burning up your 270 ohm resistor. It's common practice to replace the electrolytic caps (C-17 and 18) when servicing. Nowadays the 40uf and 20uf caps aren't standard values anymore now their 47 and 22uf. The 150v caps are now 160v. For the five caps your looking at abt $5+shipping.
There also are wax/paper style caps that should be replaced. Over time the internal paper insulation breaks down and causes them to become leaky, electrically leaky. Again nowadays standard voltage rating is 630v, in your set you will probably find ones that are 200v, 400v, and 600v. Instead of paper new ones use mylar film which is much better insulator.
With capacitors you can always go up in voltage rating never down and with resistor you can always go up in wattage rating but not down.
http://www.tuberadios.com/capacitors/ Has caps and such @ competitive prices.
GL
Would bother just replace. I'd be willing to wager that C-17C is shorted and that's what burning up your 270 ohm resistor. It's common practice to replace the electrolytic caps (C-17 and 18) when servicing. Nowadays the 40uf and 20uf caps aren't standard values anymore now their 47 and 22uf. The 150v caps are now 160v. For the five caps your looking at abt $5+shipping.
There also are wax/paper style caps that should be replaced. Over time the internal paper insulation breaks down and causes them to become leaky, electrically leaky. Again nowadays standard voltage rating is 630v, in your set you will probably find ones that are 200v, 400v, and 600v. Instead of paper new ones use mylar film which is much better insulator.
With capacitors you can always go up in voltage rating never down and with resistor you can always go up in wattage rating but not down.
http://www.tuberadios.com/capacitors/ Has caps and such @ competitive prices.
GL
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got it!
Terry
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