07-14-2011, 05:36 PM
As Exray sez don't think your osc is running. One other thing to check is measure the voltage from the cathode and control grid of the mixer. Do so by connecting the - lead of a hi impedence meter ( dvm or vtvm) to the cathode and the + the the control grid if the osc is working you will see a small - voltage like a volt or 2 if not it will read 0 or a + voltage.
Also you could have a look at the cathode to ground voltage should be 0 if the bandswitch is good and clean.
Try swapping your 6SA7 with a working one. If no go look at R5 and 23, C23.
Terry
Also you could have a look at the cathode to ground voltage should be 0 if the bandswitch is good and clean.
Try swapping your 6SA7 with a working one. If no go look at R5 and 23, C23.
Terry
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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