Help! My OR80 stopped working!

[Steve Fantastic]

I was just playing my or80 (cranked very high mind you) and then all of a sudden the sound quickly faded as if I blew something...

the tubes still light up, but no sound... Is it a fuse? How do you tell? Secondly, what is the voltage setting for Canada/US???

thank you!!!!

[User]

Well im not an expert on the whole tube thing, but i can tell ya its not your fuse, the amp would just cut out if that happened, plus if you look at the fuse its looks "burn't out"

Dave

[aussie]

i'm no guru but coul dbe the output transformer.

[melj]

Sounds like you blew a fuse. There will be two fuses on the back of the amp, most likely one of those will be gone. The amp will still light up but no sound. The most likely cause is a voltage issue if yer not in the UK OR a bad power valve. Do you have spare tubes? change them and see if the fuse blows again.

Course it could be another component, in my experience though it's been fuses due to bad valves. If it ain't the valve, take it to a tec and have them service it.

[Steve Fantastic]

Thanks for the reply's.

It looks like it was the a fuse (seing how one of them was broken in HALF when I unscrewed it!). Voltage was set to 115, and I think that's what it is for canada/US.

I've heard OR80's have a fixed bias... does that mean I can change the tubes myself???

[User]

goto this site
http://www.geofex.com/tubeampfaq/TUBEFAQ.htm#whatisbias
it has aload of info on tube amps etc...

The way i have read it ( i might be wrong), you dont need to "re-bias" if your replacing with the same "type" of valve, you only need to if you are changing,( which you cant do with oranges, but you can do with matamps, with bias adjustment points)
<img src="http://www.matampclub.com/gtv8big.jpg" border=0>
<i>taken from matampclub.com</i>

Dave

Edited by - user on 30 Apr 2004 15:22:35