david winter
Classical music lover.
Hi,
I'm currently working on a Fisher X-101-C. The 7591A were all done.
It's recaped and I haven't checked posts about improvements .
I wanted to know what modern type of 7591A would work best considering the voltages.
I also read somewhere that fixed bias models should have the 330K grid leak resistors replaced by 180K-220K and the coupling caps increased around 0.068µF but I don't know if this applies to this model as the bias can be adjusted using a common potentiometer.
What tubes would you recommend ?
Thanks,
David
I'm currently working on a Fisher X-101-C. The 7591A were all done.
It's recaped and I haven't checked posts about improvements .
I wanted to know what modern type of 7591A would work best considering the voltages.
I also read somewhere that fixed bias models should have the 330K grid leak resistors replaced by 180K-220K and the coupling caps increased around 0.068µF but I don't know if this applies to this model as the bias can be adjusted using a common potentiometer.
What tubes would you recommend ?
Thanks,
David