07-16-2017, 03:26 AM
I just started in on a 116X last night. 46 and 56 set the gain for the 1st IF amp, by grounding the cathode it's running the tube pedal to the medal. Looks like the screen grid circuit is the same for both sets which is another way to control the gain (by lowing the sg voltage it will lower the gain). Would think that having 46/56 in the circuit is a better way to go as it would tend to keep the IF stage quieter.
An other difference is the shadow meter has a parallel resistor to limit the current on the coil. On your set an open coil will kill the plate voltage to the mixer and 1st IF.
An other difference is the shadow meter has a parallel resistor to limit the current on the coil. On your set an open coil will kill the plate voltage to the mixer and 1st IF.
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 it!
Terry
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