Phil,
I had another thought … If you have a channel that you think is working within spec, you could measure the voltage across the resistor connected to the plate (pin 3) or cathode (pin 8) (assuming there is one), and bias the other side to match (on the average). Measuring across a cathode...
A while back I found what is purported to be a Defy 7 schematic (I’m not sure how to put it here). I just looked at it, and it shows three tubes in parallel for each 1/2 push-pull, with a bias voltage going to each half. So that would make sense with the 4 pots in your photo … one per triplet...
That is very interesting, sorry you are having problems.
A ways up in the thread, you showed your matching specs for the tubes you got with the amp. Those numbers struck me as being matched in sets of three, versus pairs. I obviously don’t have a schematic, but it would not be uncommon to have...
I have been watching this very interesting thread, and have a question …
Why did you decide to replace all 12 power tubes? It seems like you might have already successfully replaced a pair or two, so this is a big step. How has your reliability been?
Regards
Hi,
New to acoustic treatments ...
I see countless photos of listeners’ setups with (attractive) diffusion panels on the front wall between the speakers.
Can anyone generally characterize the “sound” that changes with the addition of these panels? I assume they affect higher frequencies, but...
Hello All,
Have any of you used the Carbon 16 speaker cables, alone or in comparison with other cables? I have poked around on the internets, but nobody seems to comment on their sound signature, like can be found on the Select Series. And I haven’t found anywhere to audition them.
Best regards!
The other thing you will find ... if you changed the value of the paralleled resisters that are in the kit, you adjust the drive level to those drivers. The extra resistors that came with mine increase or decrease the drive by 1dB, depending on which pair you pick.