TubeMonkey
Well-known member
Hey All,
hoping someone can help me with cap values to brighten this output stage up a bit, I tried fiddling with the feedback loop, removing C9, but didn't really change much. Also tried changing C10/C11 to .033uf which helped a little but seemed to change the bottom end in a way I didn't like.
Any other thoughts? Not informed enough to know what C12 and C13 might be doing to the circuit.... also the device coming off point "12" of the transformer and the associated resistor r23 is a Neon bulb/level indicator circuit.
The last suspect is it looks like this amp is designed for a 30ohm speaker.... currently driving an 8ohm speaker. Not sure how much that would affect the response. Can a stick a fat resistor across 7 and 5 of the output transformer to correct for an 8 ohm load?
hoping someone can help me with cap values to brighten this output stage up a bit, I tried fiddling with the feedback loop, removing C9, but didn't really change much. Also tried changing C10/C11 to .033uf which helped a little but seemed to change the bottom end in a way I didn't like.
Any other thoughts? Not informed enough to know what C12 and C13 might be doing to the circuit.... also the device coming off point "12" of the transformer and the associated resistor r23 is a Neon bulb/level indicator circuit.
The last suspect is it looks like this amp is designed for a 30ohm speaker.... currently driving an 8ohm speaker. Not sure how much that would affect the response. Can a stick a fat resistor across 7 and 5 of the output transformer to correct for an 8 ohm load?