JSuttie
Member
Greetings, all, from Durban, South Africa.
I've had my RM100 since Dec. 2009, and it's been blowing power fuses under certain conditions for ages.
When it's been standing for a day or two, it starts up without fault. If it's turned off and on again within what seems to be 8 - 12 hours, the power fuse pops. It's never popped one while running, switching over from standby to play, etc., only on initial startup.
I bought 2A fuses as a precaution, as I couldn't find 2.5A fuses and I won't risk going over factory spec.
I always kept the amp very accurately biased to 38mV with the standard 6L6 tubes it came with. I'm meticulous with things like this, and I've always tried to keep the amp in the best condition possible.
The biggest part of the problem for me is that I don't know of any tube amp techs out here, so "take it to your local amp guy" isn't an option for me. The agents for Randall also don't have competent support for tube amps out here, so they can't do much either.
So now I'm here. I discovered your forum this weekend and I really don't know why I didn't look for it sooner - this looks like the most epic collection of MTS info out there!
Anyway, if there's anyone out there who may know what's wrong with my amp, I'm really keen to hear your thoughts.
I'm fairly confident I can fix it myself, as I've designed and built guitars from scratch, wired up many industrial machines, and worked for a fuel injection specialist finding and fixing circuits for a while.
Never opened a tube amp though, and my policy is to check with those who know better than I whenever it's possible.
Thanks for reading,
Josh Suttie
I've had my RM100 since Dec. 2009, and it's been blowing power fuses under certain conditions for ages.
When it's been standing for a day or two, it starts up without fault. If it's turned off and on again within what seems to be 8 - 12 hours, the power fuse pops. It's never popped one while running, switching over from standby to play, etc., only on initial startup.
I bought 2A fuses as a precaution, as I couldn't find 2.5A fuses and I won't risk going over factory spec.
I always kept the amp very accurately biased to 38mV with the standard 6L6 tubes it came with. I'm meticulous with things like this, and I've always tried to keep the amp in the best condition possible.
The biggest part of the problem for me is that I don't know of any tube amp techs out here, so "take it to your local amp guy" isn't an option for me. The agents for Randall also don't have competent support for tube amps out here, so they can't do much either.
So now I'm here. I discovered your forum this weekend and I really don't know why I didn't look for it sooner - this looks like the most epic collection of MTS info out there!
Anyway, if there's anyone out there who may know what's wrong with my amp, I'm really keen to hear your thoughts.
I'm fairly confident I can fix it myself, as I've designed and built guitars from scratch, wired up many industrial machines, and worked for a fuel injection specialist finding and fixing circuits for a while.
Never opened a tube amp though, and my policy is to check with those who know better than I whenever it's possible.
Thanks for reading,
Josh Suttie