Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: Tanthanis on May 11, 2021, 09:19:46 PM

Title: Terminal voltages for speedball upgrade
Post by: Tanthanis on May 11, 2021, 09:19:46 PM

I just finished my crack amp and listened to it for a while. I just finished the speedball upgrade and some of the voltages on the readings for OA and OB were just over 100V (103 and 105). The voltage in the Manual says it should be 75-100 but it also says that the voltages are not exactly these figures.

The amp does run and it sounds great. Is it an issue to leave the OA and OB voltages just over 100V? G and B+ were 0 and 175V respectively.

Title: Re: Terminal voltages for speedball upgrade
Post by: Paul Birkeland on May 12, 2021, 05:55:19 AM

That's not much of an issue provided those are the OA and OB voltages on the big board and not the small one.