[rogerfries]

I have an old BOSS 5 in a home shop. It's controlled with Mach 3 and a hillbilly BOB. I've several times had the famous transistor blowing problem. I thought I solved it by moving the artificial leg of my rotery phase converter to L3. While this helped I just blew another one. I E-stopped it during a rapid move I've read that that can cause the problem. As the transistors seemed to test good with the meter, I had to relace all 4. After spending a few hours of "Quality time" on the floor behind the machine replacing transistors the machine is working again, but I'm not enjoying replacing these things!

I've spent hours reading about transistors in the Zone, but much of which I don't fully understand. Also some of what I'm reading seems to be theory.

Is there a solution to this problem, or should I just scrap the rest of the 1980 electronics and go to Geckodrives or something else? I'm willing and able to spend the money on the Geckos if necessary, but....

Thanks! This whole machine would be at the bottom of Long Island Sound by now if not for all of the great information i've gotten here in the Zone.