Can you go through the attached layout and read the voltages at the marked points? All DC. That should help pinpoint where your problem is

I want to know is this the amp Keef is so fond of?

If it is I WANT ONE!! (It'll have to join the want queue tho' )

OK you just might have been lucky  Before you go again, get some heatshrink tubing and cover all but the last 6-8mm of the probe ends. If they have a little notch near the end cover just up to that. That might prevent this happening again. It happened to me once, the probe slipped but thankfully it didn't contact with anything.

So did the blue spark come from the place where you had your probe or somewhere else? Are there any signs of charring? Fuses? Transformer wiring continuity? ( you will have to de-solder the leads to check these, on the output side anyway)

Has this joint been soldered? Can't see it properly as the photos are a bit blurred.

Better if you were to provide a good photo of the innerds of your amp showing how you've connected the PT then we moght be able to help. The PT is pretty self explanatory, they might not be in the same order as on the layout but they are labeled and they are colour coded so that the '0' that goes with the 50v is the same colour so you can't confuse the pairing. So check your wiring to make sure that where the 60-0 pair go to on the layout drawing your 50-0 pair do also, an similarly for all the others.

Is that design for the speaker cab freeware? I need something similar for a 4x10 I'm going to build.

Thanks,  Hywel Harris

No, no manuals, onlys a layout drawing. Nik would say that if you can't interpret the layout drawing its probably too advanced for you.

Too many notes!!!!!!!  I prefer your current playing style, much more stylish. Never did like JohnMc much either.

OK so I can't piggy back onto the existing channel relay I'd need to install another one?

Does anyone have any idea how I might mod it so that the bright switch only comes into play when on the clean channel?

TIA

Hywel Harris

If they are DC then my amp tech found a way of extracting a supply to run a fan to cool the heatsink. Not sure when i'll get chance (maybe at the weekend) but I'll take some photos of the insides so we can work out how he did it.

You could email Nik and ask?

Aren't those computer type fans AC? My tech fitted one to my DC-30 for cooling the powerscaling heatsink without installing any transformer. If you supply a lower voltage than required it runs a bit slower and quieter, I hardly notice mine at all, and never whilst playing.

Remember that after you get past the recifier you are measuring DC volts, though I guess you must have got your multimeter set right to get the 450 B+ on V4 and V5.

You should be seeing around 200volts DC on V1 and V2, if not then your wiring is amiss somehwere.

Check your voltages against this chart then you can rule out that as being a problem