01-04-2022, 01:24 PM
We should be able to get close to 135v out of the B supply. But I wasn't sure if that configuration was going to do it. Plan B is disconnect the hv winding from the 1N4007 and the B- rail. Remove 1N4007 and replace with a full wave bridge rectifier.
It will looks like this https://www.digikey.com/en/products/deta...gJKh_D_BwE Easy to connect two squiggly lines on the top go to the ac and there are a + & - connection which will go to the 47mf cap. I don't think this will exceed the 160v rating of the input cap. Or if it does you'll be the first to know[Image: https://philcoradio.com/phorum/images/sm...on_eek.gif] You may want to disconnect one end of the input cap and connect another 47mfd 160 job in series with it this with give 23 1/2mfd 320v
The pic is the first one that came up in a search. There are 100's different ones something around 400v@1A is plenty. I salvage them off of old computer p/s boards. Just have to look up the p# to see if it has a high enough voltage rating. Most of the time they do.
It will looks like this https://www.digikey.com/en/products/deta...gJKh_D_BwE Easy to connect two squiggly lines on the top go to the ac and there are a + & - connection which will go to the 47mf cap. I don't think this will exceed the 160v rating of the input cap. Or if it does you'll be the first to know[Image: https://philcoradio.com/phorum/images/sm...on_eek.gif] You may want to disconnect one end of the input cap and connect another 47mfd 160 job in series with it this with give 23 1/2mfd 320v
The pic is the first one that came up in a search. There are 100's different ones something around 400v@1A is plenty. I salvage them off of old computer p/s boards. Just have to look up the p# to see if it has a high enough voltage rating. Most of the time they do.
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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