10-17-2017, 08:26 AM
>Any suggestions?
Well yes. A couple of things are suspect. Do you know if your SG is accurate? Take the If frequency double it and listen for it in a known well calibrated receiver. With the generator set at 470kc listen for the second harmonic at 940kc. This a way to tell if the calibration is good at the If frequency.
Did you see the service note abt the 20 ohm resistor connected to the cathode of the 6A8? Is your 6A8 good ??
In some severe situations rf noise generated by modern devises plugged into the ac mains can wipeout parts of the MW and HF spectrum.
Wouldn't loose any sleep over the voltage differences as you are probably using a modern hi impedance voltmeter, this is normal.
Well yes. A couple of things are suspect. Do you know if your SG is accurate? Take the If frequency double it and listen for it in a known well calibrated receiver. With the generator set at 470kc listen for the second harmonic at 940kc. This a way to tell if the calibration is good at the If frequency.
Did you see the service note abt the 20 ohm resistor connected to the cathode of the 6A8? Is your 6A8 good ??
In some severe situations rf noise generated by modern devises plugged into the ac mains can wipeout parts of the MW and HF spectrum.
Wouldn't loose any sleep over the voltage differences as you are probably using a modern hi impedance voltmeter, this is normal.
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
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