[ms660]

That brown hunts capacitor that's connected between pins 1 & 9 of the ECL83 is the grid coupling capacitor to the audio output (pentode) section of that valve, that must be changed at least.

Check the HT electrolytic can for any signs of bulging of the can or the base also check the base and the tag rivets for any signs of chemical leakage, if all's ok it might survive.

You should be able to reverse engineer a schematic for that, it would be good practice for you and also good for the forums collection of odd ball schematics (stuff not on Pauls downloads or DVD)

The red and silver resistor and the electrolytic capacitor connected across it are the triode sections cathode bias resistor and bypass capacitor, the resistor is a 2.2k job, the 100 k resistor connected between the triode section anode (pin 1) and the pentodes screen grid (g2..pin 8) should be the triodes anode load, what looks like a 330k? resistor appears to be the pentodes g1 (pin 9) return resistor, the 470k (nearly shorting out to chassis) appears to be a feedback resistor from the pentodes anode (pin 6) via the anode tag of the sound output transformer to the triodes anode (pin1), both the screen grid and the HT feed to the sound output transformer seem to be connected to the HT filter capacitor, the big dog bone resistor is the HT filter resistor.

Any errors then guilty as charged.

Hope this will help you as to what's what circuit wise.

Lawrence.