In Reply to: RE: WE 91A Clones all seem to Omit the Feedback of the original 91A amps... posted by Frihed89 on May 10, 2015 at 13:25:19:
Maybe a little...It is my understanding that the inherently high output impedance of the pentode driver causes the freq roll-off when driving a DHT. This is not necessarily a "bad" thing, and may actually be beneficial in some systems.
I run a tube DAC (real tube output, not buffer) and use a 6C6 to drive a 2A3 and there should be some roll-off - maybe -3dB at 20kHz - but I don't find it obvious; the high frequencies are resolved and plenty present for me. I could easily run some +ve feedback, but don't feel the need.
Regards,
91.
"Confusion of goals and perfection of means seems to characterise our age." Albert Einstein
Edits: 05/11/15
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- RE: WE 91A Clones all seem to Omit the Feedback of the original 91A amps... - 91derlust 00:15:54 05/11/15 (0)