Where to find 6000uF 50V replacement cap cans??

[g1]

That seems like enough range.
Time to check the voltages at the output transistors.

[RG100ESROX]

That seems like enough range.
Time to check the voltages at the output transistors.

Reference to chassis ground...
B/E/C
Q13 -13.0mV/12.5mV/42.1V
Q14 88.6mv/-13.2mV/42.1V
Q15 -41.8/-41.9V/-14.6mV
Q16 -41.8V/-41.9V/-14.5mV

[g1]

Q13 base should be connected to Q11 emitter.  Why aren't the voltages the same?

[RG100ESROX]

Q13 base should be connected to Q11 emitter.  Why aren't the voltages the same?

The Base of Q13 is connected to the collector of Q11...I'm getting continuity between the two.

[g1]

Q11 collector connects to the + supply rail, so I think you are mistaken.
You showed around .45V at Q11 emitter before, that's what should be at Q13 base.  Find out why it's not.  Triple check voltages at Q11 and Q13, and their pinouts.

[RG100ESROX]

Q11 collector connects to the + supply rail, so I think you are mistaken.
You showed around .45V at Q11 emitter before, that's what should be at Q13 base.  Find out why it's not.  Triple check voltages at Q11 and Q13, and their pinouts.

Q: Is there any chance that the schematic is wrong??

This is what I found continuity wise (see attached photo.)

I measured 75.1mV at the Base of the 2N6254 2nd from the top left (could this actually be Q13?) as seen in the photo, as well as at the emitter of Q11.

[g1]

The schematic is not wrong. 
Don't use continuity beeper, some will beep as high as 200 ohms.
Measure ohms on resistance range.  A good connection will measure .1 ohms or less.  This is in addition to whatever your meter shows when you short the 2 probes together.

Not sure what happened to Q11 emitter voltage, as you had it there before (around half a volt).

[RG100ESROX]

The schematic is not wrong. 
Don't use continuity beeper, some will beep as high as 200 ohms.
Measure ohms on resistance range.  A good connection will measure .1 ohms or less.  This is in addition to whatever your meter shows when you short the 2 probes together.

Not sure what happened to Q11 emitter voltage, as you had it there before (around half a volt).

Those voltages are back where they were. I had the trim pot set to minimum, so the voltages were lower when I measured them again. So, they haven't changed.

Q12 = -.588V/-41.9V/-16.5mV
Q11 =  1.034V/41.9V/.447V
Q10 = 40.8V/1.026V/41.4V

Trim pot top lug = .477V
Bottom lug = 1.026V

Just so I am clear. What order do the power transistors go in??

Bottom side view from left to right??

1-Q? 2-Q? 3-Q? 4-Q?

Is 4 Q13?, and 1 Q16?? The only power transistor to have continuity to Q11 was the second one from the left. As in the photo. (Yes. I understand now that my method does not work)

If I measure the resistance from Q11's E to Q13's B (far right) I get a resistance reading of 27K.

[RG100ESROX]

Without plugging a speaker in, I was merely curious as to what the output signal would look like at this point. What do you make of it?

The sine wave acted as expected when the controls were adjusted.

[Loudthud]

That signal is about 3KHz. Is it coming from a generator, or is the preamp creating it ?

[RG100ESROX]

That signal is about 3KHz. Is it coming from a generator, or is the preamp creating it ?

Signal generator. I set it to those settings based on the specifications on the last page of the user's manual for the RG100-ES...

"Minimum input level: 3K @ .5mV"

And no...I am absolutely NOT using the input jack for my connection to ground...    (-;

[g1]

Just so I am clear. What order do the power transistors go in??

Bottom side view from left to right??

From left to right in your photo:  Q15,13,14,16

[RG100ESROX]

Just so I am clear. What order do the power transistors go in??

Bottom side view from left to right??

From left to right in your photo:  Q15,13,14,16

Thank you. I'm going to label them now. -- 'DONE!'

[Loudthud]

What is the DC at the output with no signal ?

Because this thing has a pretty high output impedance, the signal amplitude at the output as well as the DC offset could change considerably when you connect a dummy load.

[RG100ESROX]

What is the DC at the output with no signal ?

Because this thing has a pretty high output impedance, the signal amplitude at the output as well as the DC offset could change considerably when you connect a dummy load.

Voltage at the output is -0.023VDC with no signal.