Tube Amp Archive

The Mesa example was just to illustrate what the DC heater supply in my amp resembles - along with the doubling up of faux center tap, no-no'd by Merlin. My main concern it trying to ascertain, as per the schematic I attached to my second post, how you can elevate the AC heaters to 50VDC and at the ...

Thanks a lot for your reply! So that tallies up to my thinking. In that schematic, C39 and C40 would sit at the elevated DC level. Another 'solution' put forward to that circuit was to just remove C39, C40 and that ground altogether. That theory is backed up by a schematic I found that was provide b...

Hi. I'm hoping someone can help me get my head around something that, to be perfectly honest, is making my brain melt! I have a PRS MT15 amp which has quite a lot of hum. This is a very high gain circuit which uses DC Heaters for both V1 and V1 (first dedicated lead channel tube). While I've been ch...