Stereo class A Ultralinear 6+6W - 2x 6L6G + 1x 6N2P
Schematic:
Line transformer output = 250 Vac 0.3A - 6.3 Vac 3A
Diode bridge = 4 x 1N4007
Filter Cap = 2 x 100 uF 385 V
Plate voltage of 6L6G = 290 Vcc (plate <> cathode)
Grid #2 voltage of 6L6G = 240 Vcc (grid2 <> cathode)
Bias current of 6L6G = 44 mA (17.2 V @ 390 ohm 2W self bias resistor)
Audio output transformers = 3Kohm/8ohm, Grid #2 connection @ 43% of primary winding (ultralinear).
note:
6N2P =6AX7 = ECC41 = 6h2n
6N2P, 6N2PEV (6H2n, 6H2n-EB)
You can try out 6N1P = ECC88 instead of 6N2P (with less gain)
6N1P, 6N1PVI, 6N1PEV (6H1n, 6H1nBN, 6H1nEB)
6L6 = 6L6G = 6L6GT
http://hvid.it/datasheets/6L6 RCA.pdf
Youtube video:
Stereo Hi-Fi Tube amplifier 6L6G - YouTube
Schematic:

Line transformer output = 250 Vac 0.3A - 6.3 Vac 3A
Diode bridge = 4 x 1N4007
Filter Cap = 2 x 100 uF 385 V
Plate voltage of 6L6G = 290 Vcc (plate <> cathode)
Grid #2 voltage of 6L6G = 240 Vcc (grid2 <> cathode)
Bias current of 6L6G = 44 mA (17.2 V @ 390 ohm 2W self bias resistor)
Audio output transformers = 3Kohm/8ohm, Grid #2 connection @ 43% of primary winding (ultralinear).
note:
6N2P =6AX7 = ECC41 = 6h2n
6N2P, 6N2PEV (6H2n, 6H2n-EB)
You can try out 6N1P = ECC88 instead of 6N2P (with less gain)
6N1P, 6N1PVI, 6N1PEV (6H1n, 6H1nBN, 6H1nEB)
6L6 = 6L6G = 6L6GT
http://hvid.it/datasheets/6L6 RCA.pdf

Youtube video:
Stereo Hi-Fi Tube amplifier 6L6G - YouTube
Last edited: