dmp
Well-known member
Building a RCA BA-2 preamp - without a level pot or the EQ RC, it has 54 dB of gain and sounds great.
But I have a little 60 Hz hum. I'm using a Antec Power Transformer.
http://www.antekinc.com/pdf/AS-1T230.pdf
Without center tapped windings on the transformer, I'm not sure the best way to hook it up. Should I add resistors to the heater windings to ground, or elevated from ground at some point?
But I have a little 60 Hz hum. I'm using a Antec Power Transformer.
http://www.antekinc.com/pdf/AS-1T230.pdf
Without center tapped windings on the transformer, I'm not sure the best way to hook it up. Should I add resistors to the heater windings to ground, or elevated from ground at some point?