07-06-2012, 09:42 PM
This may be a perennial -- I'll risk it. Question applies to most old Philcos, I think, since the adjustment procedures all seem similar.
Following the given alignment instructions (compensating condenser tuning) I connect my signal generator to the grid of the detector (type 6A7 in this Model 60) and my VOM to the primary of the output transformer. The generator is set to 460 kHz. If I add audio to the signal I can easily hear the signal on the speaker. The meter reads about 20 volts, either AC or DC. My problem is, when I vary the attenuation on my signal generator, the meter reading doesn't change. I have a noisy attenuation pot and the meter jumps when the pot is adjusted, but otherwise there's no response.
Should I be using a different meter? Are we measuring AC or DC? No point in messing around with the compensators if the meter is not responding. Or am I just not understanding what's needed?
Thanks!!!!
David
Following the given alignment instructions (compensating condenser tuning) I connect my signal generator to the grid of the detector (type 6A7 in this Model 60) and my VOM to the primary of the output transformer. The generator is set to 460 kHz. If I add audio to the signal I can easily hear the signal on the speaker. The meter reads about 20 volts, either AC or DC. My problem is, when I vary the attenuation on my signal generator, the meter reading doesn't change. I have a noisy attenuation pot and the meter jumps when the pot is adjusted, but otherwise there's no response.
Should I be using a different meter? Are we measuring AC or DC? No point in messing around with the compensators if the meter is not responding. Or am I just not understanding what's needed?
Thanks!!!!
David
