Hello everyone. I hope everyone is still doing well during these times.
I have a couple edcor 7.6K UL push pull transformers that I would like to turn into a small amplifier.
I am looking at using a single stage 6E5P push pull amplifier and I would like to give UL a shot with these tubes to see what sort of power I can pull out.
The problem is that I can't find any UL curves for this tube, so I can't figure out what the bias point should be.
If any of you could point me in the right direction, or if you guys think UL with this tube might be a waste of time, please let me know.
I have a couple edcor 7.6K UL push pull transformers that I would like to turn into a small amplifier.
I am looking at using a single stage 6E5P push pull amplifier and I would like to give UL a shot with these tubes to see what sort of power I can pull out.
The problem is that I can't find any UL curves for this tube, so I can't figure out what the bias point should be.
If any of you could point me in the right direction, or if you guys think UL with this tube might be a waste of time, please let me know.
According the the Frank's PocNet datasheet, you want about –1.7 V of G1 bias, by however means your design merits. This results in anywhere from 35 to 50 mA nominal with a VA (relative to VK) of 125 to 175 V.
But what do I know?
Russian valve data is notoriously … hmmm … challenging to interpret.
⋅-=≡ GoatGuy ✓ ≡=-⋅
But what do I know?
Russian valve data is notoriously … hmmm … challenging to interpret.
⋅-=≡ GoatGuy ✓ ≡=-⋅
According the the Frank's PocNet datasheet, you want about –1.7 V of G1 bias, by however means your design merits. This results in anywhere from 35 to 50 mA nominal with a VA (relative to VK) of 125 to 175 V.
But what do I know?
Russian valve data is notoriously … hmmm … challenging to interpret.
⋅-=≡ GoatGuy ✓ ≡=-⋅
Yeup. I honestly don't enjoy working with russian tubes for that very reason.
But they are cheap and have interesting specs so I guess I shouldn't complain.
If that is the case, I will shoot for ~175 at 45ma.
Lets just hope the damping factor will be high enough so that I don't have to use global feedback.
All the 6E5P data you might ever want is right here https://www.pearl-hifi.com/06_Lit_Archive/08_Tube_Data/Cons_Data/6E5P_Cons_Data.pdf so just haul off and the build the thing. Tapped primary UL isn't optimal but you'll get 2-3 times the power at <half the distortion.
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