I posted a "preview" of this about 2 1/2 weeks ago, now it's transitioning from mental vaporware, to something approaching reality...
Winter is inexorably creeping towards us, time to clean off the workbench, find the soldering iron(s), and try something new for me:
A three-tube, 8WPC stereo PP amp. The ECLL80s basically contain the guts of two EL95s, and a weird little no-gain triode-like section,
which acts as a built-in phase inverter. This needs approx. 8.5V RMS drive to produce full output power, and a 12AX7 / ECC83
would fill in nicely to boost normal line level input up to the required voltages. Add in NFB, to help the THD and freq response,
like fiddling around with RC NFB networks to add in a bit of bass boost.. I've found several suitable schematics, I'll ditch the
preamp / tone stack / phono stage, and just go with "basic power amp") design.
B+ would be 250-270 VDC, OPTs 10K to 12K A-A, nothing special or exotic required. In a cheapskate pinch the unused UTK OPTs
from my earlier K502 mods, would be suitable (9.8K A-A, 8 ohms secondary, more or less). Or use Hammond 1609s, (10K A-A, 10W rating).
And all this should easily fit onto the same diminutive size chassis / box as do the DK101 and its near-twin EL84 SE amps.
I purchased four Lorenz ECLL800s recently, all four are closely matched, got them from "Old Guy Radiola", out in California.
And I didn't even have to hock the family jewels to get them!
The little no-gain triode resides underneath the "starburst" in the front-most tube.
/ed B in NC