Big-A$$ Bass Head Build

[rwillett]

I think this is why I don't work with valves and large voltages. I've read this 2-3 times. It looks like English, it sounds English but I think it's actually in Klingon.

 

Hope you sleep well and I look forward to whatever you do being done. 

[JapanAxe]

Well that's interesting. I've discovered that, when HT is applied, my nice negative bias voltage all but disappears, leaving the output valves to go full-on Fukushima. 

 

Which bit of this circuit is not a tried-and-tested design, but my own concoction? Yep, the bias supply. I consulted the writings of good old Merlin Blencowe, and discovered that my choice of component values may have left the output valves with too high a grid leak resistance. Time to re-design the circuit!