Hi everyone,
Looking for any suggestions please.
Built a JLH 1969 power on PCB's and all was well. Replaced the output caps and then it developed a hum. I wired all grounds which got rid of the hum.
But now, I cannot get any current. The set up for the amplifier is half input voltage, DC midpoint (26v/2 = 13v) and then, adjusting KT2 trimpot to set current to 1.2amps.
One channel is perfect, 2nd channel reads full 28v at midpoint with 0amps in series with the power supply?
Any suggestions would be very much appreciated I'm missing the amp terribly.
Regards,
Adam
Looking for any suggestions please.
Built a JLH 1969 power on PCB's and all was well. Replaced the output caps and then it developed a hum. I wired all grounds which got rid of the hum.
But now, I cannot get any current. The set up for the amplifier is half input voltage, DC midpoint (26v/2 = 13v) and then, adjusting KT2 trimpot to set current to 1.2amps.
One channel is perfect, 2nd channel reads full 28v at midpoint with 0amps in series with the power supply?
Any suggestions would be very much appreciated I'm missing the amp terribly.
Regards,
Adam
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