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I got about 6-7 years out of them, but dont really know what caused that 1 cap to fail.

Yep, those caps will fk your world up :evil4:

Oh, I see ground connectors going from 1 backplane to the other.

Question, why is there no lead going from bus bar to centre connector on right backplane but the left backplane has?

4 potential gremlins removed, just for shits and giggles

I shall power down and remove the rest, then will bring up on variac and dbt to be sure. Thank you Joe

Following your advice, I will keep the batteries as a backup to run the fridge and lights only, they are almost at end of life and have done a lot of charge cycles. Power failures are not common here, but its handy to have a backup when they do occur. Lucky nothing bad has happened during...

Will do, see how it goes and then later down the track we can put the 5 amp rail fuses back in. Very grateful for you and Joe’s help, also the members that have chipped in ;)

might be related to backplane revision.

How long should I idle it in spares before hooking up the pre again?

Very faint buzz from both channels, you have to put your ear right up to tweeter to hear. Right side a fraction louder. Pots right up, no input

No speaks connected, still on the bench. I will close her up and move to lounge room. Leave the pre disconnected for now?

Its on the same side as the fused B- 2

I need a Fluke :evil4:

Ac noise .015 volts on both channels. My dmm does not have millivolts scale on AC

use ac millivolts on dmm?

On the driver board, why is Q6R running at 130F and Q6L running at 100F? All the other temperatures are consistent.

Dc offset 0.4mv left and 1.0mv right what is the low level ac? Main caps are at 101v dc

Do you think that capacitor was the problem from the start? Responsible for blowing the 2 outputs on those 2 separate occasions?

Will bring it up on variac and dcp one more time to be sure. Then set bias and hook up to spare speakers, will let it idle.