12-01-2016, 06:05 PM
(12-01-2016, 05:45 PM)leftwing25 Wrote:(11-30-2016, 08:46 PM)Radioroslyn Wrote: Methinks you mean C-8, possible maybe may alter the cathode voltage a bit. also check R-2.
Yeah, kinda thought that might be the case. Yep, c-8. Resistors don't use mfds. Also noticed B+ is about 14 volts low at the rectifier cathode, but plate voltages only about 5 volts low, i.e., 140 reading 135-138. Possible problem? Unfortunately don't have any 25z6's to replace it with. Anyway, will replace c-8 and see what happens. Thanks, Terry. Ed
Doubt 5v is going to make much of a difference.
If you like excitement you tie a couple of 1N4007 across your 25Z6. Did I say that??? [Image: http://philcoradio.com/phorum/images/smi...on_eek.gif] That will get ur 140 up the abt 160. On second thought probably not a good idea. This set uses a voltage doubler where the DC output should be much higher than 140v. Typical doubler would have an output of abr 250vdc w/120ac input. Not quite sure how they get the power supply to work with such low output.
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!
Terry
