Philco Seventeener II

[Crist Rigott]

BTW, I'm getting ready to do the main board. I have the film caps, resistors, and the 2 micas will be replaced. Is there anything else that I need to be on the lookout for? These boards look very similar to the Predicta boards. I'm concerned about the networks. Should I just shot gun them and be done with them? Which ones are usually bad if any? As with most, I only want to pull this board once.

BTW, I'm leaving all the ceramic discs alone. Right?

[Crist Rigott]

While recapping the main board I ran across this:



This is K2 and it has a 500pf cap added to pins 5 & 6. Here is the schematic of K2 and I penciled in the added cap.



Here is the part of the schematic that K2 is used in. It is in the audio section just after the volume pot. Again I penciled in the added cap.



Any idea why this was done?

If you look closely you'll see K2 is missing some coating on the face and on the top in several areas. I'm going to build a new one. Any idea what I should use for caps?

Thanks.

[old_coot88]

Originally Posted by Crist Rigott

Any idea why this was done?

The only effect of adding that cap would be a slight increase in bass response.