[jcassity]

i dont know how to test a tube,, other than what i dont have which is a tube tester.
I own a lot of specialty electrical test equip but no scope, sig gen/ tracer or variac ,, nothing common to a radio shop.

while i waited for a response,, i was moving forward to address lack of short wave operation.
i have a light hum in the speaker at full volume and as i rotate the tuner i hear things / noises responding to my rotating the caps.

i poked around to hunt voltages as compared to what chucks / philco schemtics say i should have.
my voltages are oddly high at my last tube the 7AF7,, hard to get to under the band switch assmbly, wayyyyy too high, i believe i need to get it down to 280v.


My paperwork says my voltages should be about 20v higher than the prints with a 7AF7 installed,,, but... right now i have 300v on pin 3 of each 6k6.. going to a lower value R102 will make that much higher,, say in the 330v range id suspect.

I temp inserted a 750ohm resistor for the one getting hot R102, the 6k6's pin 3 went down to about 280v.

I can swap out all my tubes for my new old stock spares and see what happens, not that this will fix the lack of SW band,, but to see if the 6k6's input becomes lower if thats what you would do in my shoes.

sorry , i just dont know what i dont know right now with tube radios, i use to have a mentor on this stuff but he died 10 years ago. back then i had no time to piddle with this.