07-13-2016, 06:46 PM
Philco 38-3 has been recapped and all resistors have been checked.
I can pick up 3 or 4 local stations bwt 900 and 1300 but weakly.
The plate voltage on the RF tube 6u7g is a -4.5 volts on bands 1 and 2 but it should be 235v
Band 1 is AM and band 2 is S?W from 2 to 7.5 mhz.
the screen is 74 volts.
when I switch to band 3 the plate voltage jumps to 285 and screen 84volts.
I can RX WWV @ 10 mhz but not very strong.
I think the band switch is faulty because the coils check out.
What Am I missing ?
The schematic is on Nostalgia air.
I can pick up 3 or 4 local stations bwt 900 and 1300 but weakly.
The plate voltage on the RF tube 6u7g is a -4.5 volts on bands 1 and 2 but it should be 235v
Band 1 is AM and band 2 is S?W from 2 to 7.5 mhz.
the screen is 74 volts.
when I switch to band 3 the plate voltage jumps to 285 and screen 84volts.
I can RX WWV @ 10 mhz but not very strong.
I think the band switch is faulty because the coils check out.
What Am I missing ?
The schematic is on Nostalgia air.
