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Hello folks,
Does anyone have a schemo for the Crate KBA60 Keyboard amp? I can't seem to find one anywhere. Interestingly there is a Peavey Keyboard amp with same model number but not the same.
This amp just seems to have low gain in general even when inputting a line level signal in the Line In jack. The signal is clean up to full volume, but just not at the level I would expect. It appears there is only one op-amp between the line in jack & the power stage but that stage does seem to be amplifying some but who knows how much gain (if any as might be a buffer) it is supposed to be adding to the signal.
I see one of those opto-isolators on the board and have experienced them causing issues in some Mesas, but have no idea what function is serves in this amp. Possibly works with footswitch.
I have tried to ferret my way thru it on the board but really don't have the time to do that if I can find a schemo.
I would be more active in answering other posts that send me a message but cannot get the forum set-up to send me notifications for some reason. Guess I just need to pop in from time to time and address those.
Thanx all. Glen
Does anyone have a schemo for the Crate KBA60 Keyboard amp? I can't seem to find one anywhere. Interestingly there is a Peavey Keyboard amp with same model number but not the same.
This amp just seems to have low gain in general even when inputting a line level signal in the Line In jack. The signal is clean up to full volume, but just not at the level I would expect. It appears there is only one op-amp between the line in jack & the power stage but that stage does seem to be amplifying some but who knows how much gain (if any as might be a buffer) it is supposed to be adding to the signal.
I see one of those opto-isolators on the board and have experienced them causing issues in some Mesas, but have no idea what function is serves in this amp. Possibly works with footswitch.
I have tried to ferret my way thru it on the board but really don't have the time to do that if I can find a schemo.
I would be more active in answering other posts that send me a message but cannot get the forum set-up to send me notifications for some reason. Guess I just need to pop in from time to time and address those.
Thanx all. Glen
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