Hi All
Since there is a thread going on Steinhart amps, I thought I'd share a recent job I did on a TVP777
Here is a view of the rectifier
There are earth wires attached to the chassis underneath the large blue cap
The mains fuse was blown. I thought the lid of the enclosure touched the fuse holder, causing a short circuit, but it turned out that maybe it was the one PL519 that was cracked and failed.
This suspicious wire just hangs in the air!
The preamp wiring is a bit cramped
Luckily no repairs needed there
As it turned out, the problem was one cracked PL519
Mr Valve supplied a spare
Things were not easy!
There is a cathode resistor underneath the tube that goed open circuit when the tube fails. You need to replace that (4.7ohm). I just bridged the existing resistor.
This switch was also damaged
After fixing it and mounting the PL519, the amp played beautifully!
Since there is a thread going on Steinhart amps, I thought I'd share a recent job I did on a TVP777
Here is a view of the rectifier
There are earth wires attached to the chassis underneath the large blue cap
The mains fuse was blown. I thought the lid of the enclosure touched the fuse holder, causing a short circuit, but it turned out that maybe it was the one PL519 that was cracked and failed.
This suspicious wire just hangs in the air!
The preamp wiring is a bit cramped
Luckily no repairs needed there
As it turned out, the problem was one cracked PL519
Mr Valve supplied a spare
Things were not easy!
There is a cathode resistor underneath the tube that goed open circuit when the tube fails. You need to replace that (4.7ohm). I just bridged the existing resistor.
This switch was also damaged
After fixing it and mounting the PL519, the amp played beautifully!
