spritzer

M4 is what I generally use for this. Locking washers on the bolts so they will never move.

They are running at 14mA.

Now with it sitting in my main rack for a couple of hours it's time for some impressions. The basic concept of this amp came from me wanting to tame the SR-009 artificial top end and doing it in a cool way. End result is the continued refinement of older circuits but the changes here will no doubt migrate to the older circuits at some point. As better SiC units became available and the new SR-009 showed up it rendered this amp unnecessary but then it became clear that it could melt together the superb technical nature of the KGSSHV and the musicality of the KGST into one package. So we basically have a lot of power, with plenty of detail and a tube like sound from a solid state amp. Now I'm using it with my modified SR-007Mk2 which have pretty much outshone all my other cans. Nothing can touch the bass these dish out or the sheer control over the entire sound spectrum. The Carbon just adds to this as the detail they dig out is simply astounding, placing instruments in their own fixed place in the soundstage which the 009 can't really do as well. Bottom line, I like this amp a lot.

Nope.

+/-400V. I'd rather run with higher current than go to 450V. No boards will be sold until the design is finalized. That could be a while though.

It lives!! First impressions are positive but I need to play with the bias current a bit.

The silkscreen is an approximation at the best of times so this one will work just fine. Meanwhile...

I used 2" sinks as that's what I had. It's what I'd use though when doing it again.

Don't check, just replace all the sand on the offending rail.

I can't remember how much I paid for my SRA-7S but it wasn't cheap.

290ma? That is a lot so the raw AC is probably much higher than that but it depends on the regulation of the transformer. You should be getting around 500VDC raw off the rectifiers with that setup.

Why on earth to they have antenna's? To contact the mothership? Wireless electricity?

Diodes have a fixed drop which doesn't change with how much voltage they pass. Odds are that the meter can't handle the high AC voltage.

All Lambdas have the earpads glued to the baffle, including all of the new ones. Only difference is that with the new ones the drivers aren't glued to the other side of the plate but mounted in housings instead. The Lambda Signature was released in 1987 so six years prior to the SR-Omega. All the SR-1 through 5 units had loose earpads only fixed in place with small adhesive dots.

I have some of those but haven't tested them yet. They will go in a BHSE so that will see if they actually work. The lead wires the use are the worst I've ever come across. Nasty, cheap stuff.

Well the circuit above doesn't work in that configuration but it is really just a voltage divider.

Why 280V? Normal bias is 230V and resistors are far less noisy.

Even includes Kevin's toes!!!

Looks good!! Where did you get that R-core? I've been trying to find somebody to sell me good ones for a while now...

There is no spec available for these transformers, not even in the service manual. I did replace one in a 100V (SRA-10S) unit and used these specs, 520VCT-100ma, 52VCT-250mA

They are not all the same but most are of similar quality. Those that I just got are from China but feel a lot nicer. Need to do some more testing though...

Yup, that's an amber led. Quite partial to it which is why I just got 200 of these switches today...

I would change to no conductive screws Sören, nothing in that CCS should be conductive to ground. As for me, it's been a busy couple of days...

The heatsink is grounded so it doesn't make any sense that it shorts there. Also no traces too close to that spot... Weird...

Normal bias sockets no longer available and probably won't be made again. As for the Audio Valve, it has literally nothing to do with the SRX.