Lower mu works just as well when the tail is truly “long”, as in current source to the negative supply long.
Regulation has got to be pretty damn good in that power trafo to keep a whole 180 watts here. My home brew special power trafo drops me to about 420 at full continuous sine wave. 88% regulation, spot on what I get when I buy the darn things and run them to full VA rating. Only real difference in the supply is I used separate 120 and 245 volt windings with two full wave bridges. Got a pair of 800 VA cores out of a solid state amp that’s been decommissioned fixing to get rewound to power a bunch of 21LG6’s. Finally found enough decent compactron sockets!
Power transformer rewinding is fun and satisfying. It feels like cheating on your taxes in a BIG way and getting away with it.
Overall circuit topology isn’t much different, other than there’s a whole EQ chain and more gain in between the first two triodes, with one stage I can starve to add 2HD. I did transformer couple the mic input, though. XLR jack on the rear panel.
Power transformer rewinding is fun and satisfying. It feels like cheating on your taxes in a BIG way and getting away with it.
Overall circuit topology isn’t much different, other than there’s a whole EQ chain and more gain in between the first two triodes, with one stage I can starve to add 2HD. I did transformer couple the mic input, though. XLR jack on the rear panel.