has anybody ever tried using Fixed and Cathode bias at the same time?
say you had a pair of 6V6 in a git amp,
why not use maybe 20 volts fixed bias and 10 volts cathode at the same time?
when i changed to cathode bias on the Princeton Reverb, i gut the added compression,
but the power dropped a bit, fixed bias is more efficient.
so why not try to get the best of both worlds, more compression and more power?
all you do is add a smaller value than normal cathode resistor to a fixed bias amp,
so instead of the typical 270 ohm cathode resistor, use 100 ohms,
6V6 P-P amp running at 80 ma would give you 8 volts of cathode bias,
then just tweak the voltage divider for maybe 20 volts of fixed bias?
have to go thru the Trainwreck schematics to see oif Ken Fisher ever did this,
no wait, i need 36 volts fixed, and 8 volts cathode, as the resistor will eat at the fixed,
right?![Eek! :eek: :eek:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
say you had a pair of 6V6 in a git amp,
why not use maybe 20 volts fixed bias and 10 volts cathode at the same time?
when i changed to cathode bias on the Princeton Reverb, i gut the added compression,
but the power dropped a bit, fixed bias is more efficient.
so why not try to get the best of both worlds, more compression and more power?
all you do is add a smaller value than normal cathode resistor to a fixed bias amp,
so instead of the typical 270 ohm cathode resistor, use 100 ohms,
6V6 P-P amp running at 80 ma would give you 8 volts of cathode bias,
then just tweak the voltage divider for maybe 20 volts of fixed bias?
have to go thru the Trainwreck schematics to see oif Ken Fisher ever did this,
no wait, i need 36 volts fixed, and 8 volts cathode, as the resistor will eat at the fixed,
right?