a 45 is typically just above 30 watt at the point of breakup and ca 50w at full volume.
a 50 would be 40-50 and 80-90 respectively

retube, install 1k screen resistors on v4-5 pin 4 and 6. install 5k6 resistors on pin 5 on v4-5

BTW I'd rather want to build the amp myself - its much more fun that way

Nik,  I'm already saving for this one

the second comet fired up without problems. the bias resistor should be increased to 10k though to get the right bias range for 6l6s (not necessary for el34s, it seems)

bass off, treble, mids and bright volume on

the second comet has arrived. will start buiding soon

see the germino page for info

see the metro amp kit instructions

thats my homemade cab. amp is nik's kit but with original type coupling caps and siemens el34s, tungsram ecc83 (v1), old german ecc83 or american 5751 (v2) and mullard m8137 (v3). I've added shielded from the input to v1 and from v1 to the volume control

a slo or a diezel herbert

I'd be interested in the mods

it seems that there will be another ceriacomet

weber's kit is called ab200. i don't know if its available yet. there is some info on his forum

adjust the bias. just change the bias resistor if the range is too high or low