Checked the 680 ohm transistor to be sure it was not touching anything other than terminals.
Switched tubes, wires, etc., no change: low level hum in both channels, not affected by volume, sound from right channel only.
Voltages are as follows:
Terminal Voltage
1 204
2 0
3 0
4 409
5 204
6, 16 389, 390
7, 17 both 0
8, 18 both 0
9, 19 .016, .050
10, 20 both 410
11, 21 354, 355
12, 22 both 0
13, 23 both 0
14, 24 both 0
15, 25 18.2, 17.36
A1, B1 .016, .049
A2, B2 367, 369
A3, B3 18.2, 17.4
A4, B4 both 0
A5, B5 70.7, 60.5
A6, B6 2.29, 2.31
A7, B7 -3.73, -3.71
A8,B8 2.23, 2.22
C1 -3.84
C2 3.28
C3 alternates between 0 and .046
C4 -3.84
C5 2.46
C4S MEASUREMENTS:
0A 70.1
0B 59.3
10 412
20 412
Tubes still light up, as do all 4 LEDs.
Is there any other information I can provide? I am at a loss for what to do at this point.
Thank You