Not sure what you are showing us.
I only see 4 power transistors where I can´t read the codes, a presumably driver IC, assembled on what appears to be perfboard, no heatsinks, NO SCHEMATIC, no data on power supply.
Feed us more and we will wag our tails 🙂
EDIT: just found your OTHER post on exact same subject (naughty naughty) https://www.diyaudio.com/community/...o-3920-p3ky-3918-1x-n80-3704-p80-3705.385381/
Ok, you have a few unknown health state pullouts, about 10% of an amp build cost.
Do you have a schematic, PCB, transformer, supply components, heatsinks, chassis, cabinet, hardware?
You still need this missing 90% for a working amp.
Besides successfully building it, of course.
Personally, given they are rare and sort of unavailable, I´d EBay them.
Best case get money to finish your other SW amp project, worst case extra beer money never hurts 😉
I only see 4 power transistors where I can´t read the codes, a presumably driver IC, assembled on what appears to be perfboard, no heatsinks, NO SCHEMATIC, no data on power supply.
Feed us more and we will wag our tails 🙂
EDIT: just found your OTHER post on exact same subject (naughty naughty) https://www.diyaudio.com/community/...o-3920-p3ky-3918-1x-n80-3704-p80-3705.385381/
Ok, you have a few unknown health state pullouts, about 10% of an amp build cost.
Do you have a schematic, PCB, transformer, supply components, heatsinks, chassis, cabinet, hardware?
You still need this missing 90% for a working amp.
Besides successfully building it, of course.
Personally, given they are rare and sort of unavailable, I´d EBay them.
Best case get money to finish your other SW amp project, worst case extra beer money never hurts 😉
These are one of the most unreliable transistors due to the high current gain, they are easily over driven and fail.