Blown 6550 tubes and resistors in ARC VT 200


It is my guess that if all the owners of ARC power amplifiers, mostly VT owners, who at one time or the other blew one or more 6550 power tubes and associted resistors, could assemble single file in a line, that line would extend around the equator. I would be somewhere in that line!
jaguar1845

Showing 1 response by jafox

Yes, this seems to have been ARC's methodology to use power resistors as fuses for the VT series amps. I went through this with the VT130 a few times and after the second time, I bought a dozen resistors so I would be ready when the next power tube failed. It was an easy task to remove the amp's bottom plate and solder in a replacement resistor .... then a few more minutes to re-bias the amp and then back in business. It was quite a loud explosion when the resistor blew up!