Good ol' crimp connectors... I can replace the word "crimp" with "RCA" also in that sentence in my case a couple of weeks ago (again).
I had to see the doctor too after that..... 😷😠
Cruising, one channel can only dial up to 178, other side 176. I guess both channels are pot limited. This is plenty ho enough to cook in!
Nice and toasty. 178 mV on each side, after jumper install, set offset and remove has both channel under 1 millivolt right this min. I will let it go for about 30 more mins and if no explosion, test speaker time.
It has been 30 mins, but I keep having bias slowly rise to 178, dial back to 177. Would like to see this stabilize before music plays.
Iq is under 5% deviation from cold to temp. equilibrium
same as for +/-10% rails change, due to possible mains voltage change
in fact, quite possibly under 5%,lazy to check my notes, and who cares ..... once when it is good enough, it is good enough
so.......
Oh, I guess I need to snip off the wire going from positive input to ground now, before music
And it plays fine, no hum, just Bill Evans right this minute.
Sounds Very nice, steady 1-2 0r less mV offset, bias steady at 176 mV. Heatsink behind devices is 50-52C. Device, by shooting edge reads lower, not much buI seriously doubt its accuracy. I would think device would be hotter, but whatever, amp is playing in grand fashion. I'm about to put a pin in this one after a few on off cycles.
Put back on work table to solder A/C input wires, will put in main system tomorrow and photo it.
I built this amp to driver the speakers in that set. X's XSD speaker.
Russellc
I built this amp to driver the speakers in that set. X's XSD speaker.
Russellc