geoffcin

Responses from geoffcin

Tube newb, what to do?
Everything's going great! Amp runs fine, but I was a bit surprised to see that the power transformer gets warm during light use. I guess the amp draws a lot of current even if I'm playing it at a modest volume. 
Is bias setting necessary on matched tubes?
Hi Marty,Thanks, and I'm with you on that! The tech said that he would show me the procedure for biasing when I picked the amp up. The real reason for it costing $125 is that he's going to go over the amp to make sure there's no other problems. Ri... 
Is bias setting necessary on matched tubes?
OK I talked with a repair tech and he said it would be $125 to bias the amp. In addition he's going to go over the amp to see that it's all working correctly. I think it's a fair price for that service, am I wrong? 
Is bias setting necessary on matched tubes?
OK, it looks like my amp the Mingda 368-b90 has manual bias adjustment, one for each tube. I've got a multimeter, but I'm about as new to tube bias adjusting as it gets. Is it easy to do? Where can I get info on how? I don't have any info on the s...