62vauxhall
Veteran and General Yakker
- Joined
- May 14, 2014
- Messages
- 2,351
- Location
- Southwest Kootenays BC
- Tagline
- No such things as bad days, just bad moments
No worries, totally understand. I'll monitor the forum for any forthcoming suggestions.
I don't understand why we had very little DC offset in the left channel and now we have 37 volts. Was the DBT bright on that last test?
The logical answer would be something got F&^%$# up between those posts....but how ....I'm lost....
Too bad.
It's about now that I'm inclined to photograph everything, document all connections, remove all components and replace them with new ones.
EDIT: On the back wall that is.
Yep, the intermittent nature of things leas me to believe there are some things floating around under the sockets. it doesn't take much to F&^% your world up under there....
Gary,
Have you considered upgrading to the White Oak backplane and controller board? A little more out of pocket money but the end result will be a better amp. Thinking out loud here.
Nav
I just noticed a notation on the schematic you sent a few days ago about the bias transistors which says E = red - B = black - C = Brn.
I compared that to a diagram I made several weeks ago of a 2N5088 and hate to say, but I do not have them wired that way - E and C leads are reversed.
Since this problem seems to revolve around bias voltage, is switching those leads the big fix? I can get more 2N5088's tomorrow because they don't seem to care for disconnection re-connection considering where they are.
Once I change them (again) I'll check bias and offset voltage once more and post tomorrow.
No. Those hand written notes on the schematic are not correct.