Paramour I to Paramour II.5 rebuild buildup

[Caucasian Blackplate]

You're about 75% of the way to understanding.  The current issue is both with heater current available, and the high voltage current available for the shunt reg tube.  Heater current can be added by adding a filament transformer.  Getting more B+ current is nearly impossible without getting a 2nd pair of PT-2's. 

The 6CM7 is a fine sounding tube (the small triode is at least), and I would personally say that the SR-45 is the best sounding Bottlehead amp I have heard to date.  I should qualify this statement by saying that the SR-45 entails Magnequest Iron from the get-go, and has limited useable power.

[2wo]

I have a version of the SR-45 and it is outstanding, far and away the best amp I have. I  am just back from Hornefest with it and  everyone who listened to it liked it a lot.

The 6CM7 is a good sounding tube, the only problem I have is it’s fairly low gain. It needs a good line stage to drive it. If you have a foreplay,  you can turn the knob past the first few clicks

All in all, it is a terrific amp. If you can get by, with less then 2 watts, I give it my strongest recommendation…John

[Doc B.]

FWIW I can build pretty much anything I want for my own system, and I use a SR45 amp on my ribbon tweeters.

[ssssly]

I guess SR-45 it is then.