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In Reply to: RE: The Quiz of today??? posted by TomWh on September 16, 2014 at 13:47:18
"The only thing that is out of the ordinary is the 380vct of 269ex's are left floating"
But that's the same for both channels?
So if the heater voltage is the same on each 6j5 then that can't be the problem.
Did you try swapping the 6j5's? I've had tubes that would give that much of a difference.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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Hey Tre
I changed out everything more than once. Just tried a another trans I had lying around and it is very close to the higher b+ of the other trans.
The only thing that is making a difference is changing the filament transformer part of these 269ex's.
I need to get some regular filament trans anyway I just wanted to see what it would sound like and I had these here. I will just use the higher b+ 269ex with the 269ax(they match up to within a couple of volts) and see how it sounds.
I am still at a loss on how if the input is 120 volts the filament is running at 6.2 volts how that could change the b+ of the circuit unless the filament windings are interacting with the unused b+ winding some how, but you would thing that would change the filament voltage.
Thanks Tom
"........but you would thing that would change the filament voltage."
Yes, I would too.
It's a mystery.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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