Tube Amps / Music Electronics
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|previous: Stephen Conner Hi David,||View Thread|
|11/8/1999 4:43 PM|
|anonymous||Re: Advanced feedback loop questions..|
ok.. so negative current feedback is used
to raise impedance on solid states.. it
wouldnt be of any real use in tube amps
because impedance is already high.. Is
a 16ohm impedance more bass/mid heavy than
an 8 ohm impedance.. or is there only a
slight difference in the sound? I also
tried the 3 cap LFO trick on the actual
feedback loop instead of around a single
gain stage and no oscillation -- at least
none I hear.. what gives? I got lots of
lowend motorboating when I used put it in
parallel with one of the preamp stages..
I also would like to know how to convert
negative feedback to positive feedback..
is it a change in polarity or just
phase? - how would I attempt doing that -
I remember someone posting about having
wires backwards on a output tranny
oh.. is the "Art of Electronics" applied
directly to tube amps or is it a general
book on negative fb and audio?
|Don Symes It _is_ a reversal of polarity to s... -- 11/8/1999 7:05 PM|
Stephen Conner Hi,