I'll just stick with the spec'd values for now. Here's the schematic:

PARTS LIST (AMPLIFIER)

P1 - Potentiometer 100 k logarithmic stereo (ALPS RK-27112)

R1 - 1M ohms, 1 Watt carbon resistor

R2 - 33 ohms, 0.5 Watt metal film resistor

R3 - 47K ohms, 1 Watt carbon resistor

R4 - 820 ohms, 1 Watt carbon resistor

R5 - 4k7 ohms, 5 Watt wire-wound resistor

R6 - 3k3 ohms, 10 Watt wire-wound resistor

R7 - 10k ohms, 0.5 Watt carbon resistor

C1,C2 - 220 uF, 400 V electrolytic capacitor (Nichicon)

C3 - 220 uF, 100 V electrolytic capacitor (Nichicon)

C4 - 0.22 uF, 250 V MKT (DDR stock)

V1 - E88CC (Brimar)

V2 - 6AS7G (RCA)

PARTS LIST (POWER SUPPLY):

P2 - 1k trimpot (Piher)

R8,R9 - 6.8 Ohm, 1 Watt carbon resistor

R10,R11 - 180 Ohm, 0.25 Watt metal film resistor

C5,C6 - 22 nF, 1 kV MKT (DDR stock)

C7,C8 - 100 uF, 450V (F & T)

C9 - 1 uF, 250 V MKT (Philips)

C10 - 22000 uF, 25 V (Sprague Powerlytic)

C11 - 10 uF, 63 V (Philips)

C12 - 100 uF, 35 V (Roederstein)

IC1 - LT1084CP (Linear Technology)

D1,D2 - 1N4007

D3..D6 - P600A (50V, 6A)

T1 - 220:2 x 115 V, 30 VA isolation transformer

T2 - 220:9 V, 50 VA transformer

L1 - Inductor 10 H, 90 mA, 270 Ohm (Triad)

So a better set of questions are:

1. If something failed, what is the maximum voltage the power supply caps would see? Same goes for the output caps in the amplifier section.

2. Or are any of these capacitor values over spec'd?