Tube Amps / Music Electronics
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|12/16/2003 10:47 PM|
||push pull front end (again)|
a while ago there was a thread here about using a balanced design. someone mentioned driving a push pull input stage straight from the guitar without a phase inverter. i was wondering if you could do this without changing the wiring in the guitar, and would it be a safety hazard if the guitar is not grounded?
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|12/17/2003 12:55 PM|
you cannot do it without modifications to the guitar itself. you need a balanced signal output from the guitar, which mandates either a phase splitter on board, or a pickup that has a +, -, and ground connections. obviously you will also need a three conductor cable.
|12/17/2003 5:44 PM|
Sounds like a cool op amp application. Not in the guitar though - better to do it at the amp front end.
You could power the op amp(s) with the heater supply.
|12/17/2003 6:04 PM|
It can also be done with a bal-un xfmr.
|12/17/2003 7:20 PM|
I always thought a centertapped pickup coil into a balanced input circuit would be wicked-cool.
|12/18/2003 3:44 PM|
Is that how Les Paul set up his personal guitars? I know he says he uses "low impendance pickups," and he needs to run a preamp in front of his regular amp because of it.
Gibson had a model of Les Paul for a couple of years that had the same sort of pickups, but it didn't sell too well. I think it was the Artist series.
|12/17/2003 8:19 PM|
why would you need a center tap? couldnt you just RC couple the signal end to the grid of one tube and the ground to the grid of another tube?
what am i missing here?
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