Deepdark
Well-known member
Hi
I would like to know what is the acceptable margin when measuring all dc voltages? I Found that values can differ quiet a bit when trying different tube brand. i.e:
V1, voltages are way closer to the original with the Tung-sol tube I tried than with the Sovtek, which was on the low side.
V4, I tried 2 6005(6AQ5) tube but my pin 2 remain around 5.7 to 6.3v (original is 7v) and pin 5 between 138 and 155v (original
is 135v).
My feedback path is around 18V (original is 27V) but for now, my output transformer isn't installed and my tube aren't burned, so I guess the value will rise a bit??
My meter calibrate without any trouble.
B+ is about 265v
I would like to know what is the acceptable margin when measuring all dc voltages? I Found that values can differ quiet a bit when trying different tube brand. i.e:
V1, voltages are way closer to the original with the Tung-sol tube I tried than with the Sovtek, which was on the low side.
V4, I tried 2 6005(6AQ5) tube but my pin 2 remain around 5.7 to 6.3v (original is 7v) and pin 5 between 138 and 155v (original
is 135v).
My feedback path is around 18V (original is 27V) but for now, my output transformer isn't installed and my tube aren't burned, so I guess the value will rise a bit??
My meter calibrate without any trouble.
B+ is about 265v
