RE: Fisher 200 tube amp fuse blowing issue
I guys, I know there are many extremely knowledgeable electronics wizards on this site so I am looking for help or confirmation of a fuse blowing problem. I just had my Fisher Mono block amps serviced (200's) shortly after pluging one in a fuse blew, it happened several months ago as well , thats when I decided to take them to a tech, originally I thought maybe it was my cheap power bar causing issues, they were all checked by my tech and he said it appears a choke was arcing on the bottom plate and looked after that issue, I removed all the tubes but the rectifiers and tried the amp again, it blew again, again I tried with no tubes and the fuse did not blow, from these results can I be releaved in thinking my transformer is fine? also can this confirm that one or both of the rectifier tubes may have a short? or could there possibly be another issue? My tech biased them as well to the specs on the schematics which is very high 125MA which from what I have read is driving the EL34 tubes very hard, should I adjust this as well once I get the fuse issue sorted, I would great appreciate any suggestions or confirmation of what the issue might be, I have no way to test the rectifier tubes other then replacement, so should I take a chance and switch them with the other amp? I was concerned for damaging the other 34's. many thanks in advance D
I guys, I know there are many extremely knowledgeable electronics wizards on this site so I am looking for help or confirmation of a fuse blowing problem. I just had my Fisher Mono block amps serviced (200's) shortly after pluging one in a fuse blew, it happened several months ago as well , thats when I decided to take them to a tech, originally I thought maybe it was my cheap power bar causing issues, they were all checked by my tech and he said it appears a choke was arcing on the bottom plate and looked after that issue, I removed all the tubes but the rectifiers and tried the amp again, it blew again, again I tried with no tubes and the fuse did not blow, from these results can I be releaved in thinking my transformer is fine? also can this confirm that one or both of the rectifier tubes may have a short? or could there possibly be another issue? My tech biased them as well to the specs on the schematics which is very high 125MA which from what I have read is driving the EL34 tubes very hard, should I adjust this as well once I get the fuse issue sorted, I would great appreciate any suggestions or confirmation of what the issue might be, I have no way to test the rectifier tubes other then replacement, so should I take a chance and switch them with the other amp? I was concerned for damaging the other 34's. many thanks in advance D