Electrobumps
Well-known member
I want to experiment with DC elevating an AB763 guitar amp heaters.
From what I've read there are a lot of people using values similar to 200k / 33K for around 60v.
I will make R2 a variable resistor as I want to hear the effects of different elevations some people suggest as low as 20v and others suggest around 60v. With the 20v being better for hum.
less load on the TX is good, would it make more sense to make R1 1meg as this will produce less current draw, unless I'm missing something?
Vdc = 430
R1 = 1 meg
R2 = Variable 200K
R2 set @ 180K = 65.5v
R2 set @ 49K = 20v
From what I've read there are a lot of people using values similar to 200k / 33K for around 60v.
I will make R2 a variable resistor as I want to hear the effects of different elevations some people suggest as low as 20v and others suggest around 60v. With the 20v being better for hum.
less load on the TX is good, would it make more sense to make R1 1meg as this will produce less current draw, unless I'm missing something?
Vdc = 430
R1 = 1 meg
R2 = Variable 200K
R2 set @ 180K = 65.5v
R2 set @ 49K = 20v