Hi all,
Old thred but;
I have been running KT-66's in my bc30 since 2011 and no problems.
no mods, it made the sound fuller like it could breath better.
It still can kill with single coils through.
Now on to mods , I have looked at the 50 cal schm. And r5 is 1m but r6 is the 470k. I am going to make a 470 for r6 and see whats up.
I have owned it from new love this beast.
My question is about the PT and the resistors that need to be installed? What and were please?
thanks
ps,never seen so many cold soilder joints in my life. If I knew before I would have fixed it!
Follow up, I found some info on the rec being screwed up by start up ripple and cathode death..
Should the resistor go across the "Dumb #ss switch" IE stand by switch so it always has slow leak??
I know never use the stand by Switch but doing a cold start so the rectifier builds up slower? Or would a Cap be a good addition to the resistor?
Time to get P spice running a sim. of this..
Also, the idea of putting a heater SW in with a diode so it will cut heater v by 1/2
Too the guys that say you can't run KT-66 tubes The guy who made the BC30 said it could handle the 66's plus
the ot is 22k ohms and the KT-66 are rated at ahhhh 22k ohms. Sounds like it might work...
