10-29-2016, 10:54 AM
Gosh I thought I got rid of you!!!!!!
JUST KIDDING!
Well there is a couple of things we can do to try to see which stage is oscillating that isn't suppose to be.
Plan A Turn on set. Get it motorboating. Place one of your fingers one of the rf or mixer coils. Do this until you get to a coil that stops or changes the motorboating sound. This will give a clue has to which stage is the issue. By touching the coil it detunes it changes it's characteristics hopefully enough to make a difference and change how the circuit is misbehaving.
Plan B Grab a weak 1.4v loctal tube and cut off all of it's pins except for the 2 filament pins. Think it's pins 1 and 8. Probably wouldn't chop up a converter tube there a little harder to come than the others. Since your filament circuit is in series if you remove one tube they all go out. But if you replace one with this tube it will keep the filament circuit in tacked. Use this tube to swap with the rf,mixer, and if tubes to find the motorboating stage.
JUST KIDDING!
Well there is a couple of things we can do to try to see which stage is oscillating that isn't suppose to be.
Plan A Turn on set. Get it motorboating. Place one of your fingers one of the rf or mixer coils. Do this until you get to a coil that stops or changes the motorboating sound. This will give a clue has to which stage is the issue. By touching the coil it detunes it changes it's characteristics hopefully enough to make a difference and change how the circuit is misbehaving.
Plan B Grab a weak 1.4v loctal tube and cut off all of it's pins except for the 2 filament pins. Think it's pins 1 and 8. Probably wouldn't chop up a converter tube there a little harder to come than the others. Since your filament circuit is in series if you remove one tube they all go out. But if you replace one with this tube it will keep the filament circuit in tacked. Use this tube to swap with the rf,mixer, and if tubes to find the motorboating stage.
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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