sonolink
Well-known member
Hello everybody
The other day a friend came by with his fried Hot Rod Deluxe. While he was gigging the amp began smelling like burnt and stopped working. Back at home he replaced the fuse but it was blown as soon as he switched the amp back on. So he called me and I told him to replace the fuse, take out the tubes and flip it on. The fuse held. So he replaced all the tubes.
When he switched the amp on the sound was low output and distorted. So I told him to bring it over. After inspecting visually the amp I saw that at least one diode was burnt. I think it's called a flyback diode. The thing is, I don't know what a "flyback" diode is (could someone please explain) and I assume that although marked C5 on the PCB, it should be CR5 on the schematic. I also assume it's a protection diode and after a quick search I think the correct value is 3000V/0.25A.
My questions are:
-Can this diode be replaced by another one like 4004 or 4001? I'm asking cos I got a bunch of those that I use as rectifiers for amps
-Should I check other components that could have been damaged aswell (apart from the obvious resistor next to the diode of course) and if so, any suggestions?
https://imgur.com/a/QC5JS9K
https://imgur.com/a/2ugQNkU
Thanks a lot for your help
Cheers
Sono
The other day a friend came by with his fried Hot Rod Deluxe. While he was gigging the amp began smelling like burnt and stopped working. Back at home he replaced the fuse but it was blown as soon as he switched the amp back on. So he called me and I told him to replace the fuse, take out the tubes and flip it on. The fuse held. So he replaced all the tubes.
When he switched the amp on the sound was low output and distorted. So I told him to bring it over. After inspecting visually the amp I saw that at least one diode was burnt. I think it's called a flyback diode. The thing is, I don't know what a "flyback" diode is (could someone please explain) and I assume that although marked C5 on the PCB, it should be CR5 on the schematic. I also assume it's a protection diode and after a quick search I think the correct value is 3000V/0.25A.
My questions are:
-Can this diode be replaced by another one like 4004 or 4001? I'm asking cos I got a bunch of those that I use as rectifiers for amps
-Should I check other components that could have been damaged aswell (apart from the obvious resistor next to the diode of course) and if so, any suggestions?
https://imgur.com/a/QC5JS9K
https://imgur.com/a/2ugQNkU
Thanks a lot for your help
Cheers
Sono