High DC on one output channel

Alonzo · 1474

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Offline Alonzo

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on: September 21, 2017, 06:16:00 PM
If the 475K resistor doesn't lower the DC on the output enough, should I increase the value to ____?  Got a new amp in today that has a high DC monitor circuit that was tripped when connected to one channel on my BeePre.  Measured .0057 DC on that channel (.0014 on the other channel).  Added Harris attenuators to the inputs to get it to work while I ask if there's a problem with my BeePre or do I just have an overly sensitive SS amp.
Thanks,
Alonzo

Alonzo
Gameroom:>Mainline to HD820, SR45 to Pipette
>BeePree Kaiju & SII to Altec 19 knockoffs
Office:>BH Stat amp to Koss 95x, T20 SET to JBL 4309s
Den:> MorePlay 845 SET to Altec Valencia's

Offline Paul Birkeland

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Reply #1 on: September 22, 2017, 05:00:14 AM
Whew, that's a very sensitive amp!

You can take those 475K resistors down to 47K to see if that helps, or consider whether you can put a cap between the center pin of each RCA jack in the amp and where it lands on the PCB.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Alonzo

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Reply #2 on: September 22, 2017, 05:35:18 AM
Thanks,
I"ll try the 47K first, don't want to void the warranty on the amp just yet.  May just send it back, as I don't see a big increase in sound over the parts express amp it's replacing that didn't have any DC problems.

Alonzo
Gameroom:>Mainline to HD820, SR45 to Pipette
>BeePree Kaiju & SII to Altec 19 knockoffs
Office:>BH Stat amp to Koss 95x, T20 SET to JBL 4309s
Den:> MorePlay 845 SET to Altec Valencia's

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