Quote:
Originally Posted by bandersen
Aw don't do that. It's only original once. I doubt it's the source of your problem anyway.
Don't use the 1,000pF cap and turn up the RF out. Forget about what level the alignment says to use. I've also asked several times what volts/div you have the vertical at?
What I'm trying to determine is do you have a very weak signal and it's getting swamped by noise. Or are you just not feeding a strong enough signal into the set
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Again, I'm not sitting with the unit at the moment so I'm not 100% sure but deleting the cap, 10X on the scope probe and 250mV of signal strength I still have these results. When I get my new old stock Tektronix setup tonight, I'll get you a spot on read for the vertical V/Div. Previously, I had blasted a 1.0V RF into the TV and was instructed that was a huge signal strength so I started using the reduced recommended voltage.
I did swap out the 6AL5 for 2 other replacement tubes with no change. If it is a filament voltage issue, that wouldn't make a difference so I need to check that out as well and check the filament resistor as Penthode recommended.
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