Just a little more data on the amp. The peak clean power output is 1.3 watts RMS per channel (as determined from watching an oscilloscope). The 3dB frequency response is ≈48 Hz to 30 KHz. A plot of the end to end frequency response is included below with the lines indication the stated bandwidth of just the Edcor output transformers.
Attachment:
Frequency Response.png
This plot is from measured data taken with a signal generator (Zout=600Ω) and a fixed resistive load of 8Ω. The test setup is pictured in the first post. Below is the as built schematic (nearly).
Attachment:
Schematic - as built (small).jpg
I say nearly because after finishing the amp and checking the plate dissipations, I found that the B+ voltages were running a little high. As such I added an appropriate dropping resistor in each B+ line to get the plate dissipations back under the maximum of 5.5 watts each. You can see the modification in this picture.
Attachment:
6CY7 Amp Resistors.jpg
They may not be in the most optimal position in the power supply, but with a nice constant current SET stage it works out just fine.
I still can't get over how good and how loud this amp sounds. It handles everything from classical, to blues, to choral music equally well. And the sound stage is awesome. I will never go back to building common power supply filters for both channels ever again.