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DR105 bias question

Posted: Thu Dec 29, 2011 4:52 am
by Buzzardstein76
I have a DR105. I did an easily reversible bias pot mod that uses a 1 Meg linear pot in between the 47K resistor and the ground. Before the mod, i was getting 60 mA for the bias setting. The pot brought it down to 42. The plate voltage is 498 V. I should be getting around 35 or so, i believe. Is having the bias at 42 mA still ok? Any help is appreciated

Re: DR105 bias question

Posted: Thu Dec 29, 2011 6:07 am
by Ted B
I did the same thing:
viewtopic.php?f=2&t=1378

My amp seems to be running fine with 42ma - certainly a heckuva lot better than 60ma!

Re: DR105 bias question

Posted: Thu Dec 29, 2011 6:47 am
by Buzzardstein76
I got the idea from your post. Thanks for sharing that.