MLA

Very good suggestion; pentaconn is a good idea but the shorting risk sucks.

Not my field of expertise, but I would i imagine the start sequence is designed to start from full power, so if it was me I'd rather just flick the switch and see what happens as I would be worried that gradually ramping up voltage might leave parameters out of spec at the wrong time... But that's mostly a guess :).

That's the LT1085 regulator, right? Formula for setting voltage is on page 11 or 12 in the data sheet if I remember correctly.

Another option is https://www.mueller-rondo.com/eng/ in Germany. They build exactly to spec, sometimes cheaper than Toroidy, and turnaround has been about a month on previous orders.

For what it's worth, my CFA3 bords fell 2,5V short in terms of offset when I built them. In my case, swapping all the red LEDs to a version with much less forward current than the ones I installed first (I'm now using LTL-4221, which has 2mA I believe) put all numbers back in the right places.

For me they ship to Sweden without problem. Don't know what you need to do to make international delivery happen though...

Interesting. I believe I followed the board and came up with about 60mV offset w/o servo.

Toroidy will do whatever you need in my experience (including dual primary); anything T2 will be custom spec anyway. Mueller-Rondo lets you specify the exact diameter when you place an order, so that's quite helpful. The larger Mueller-Rondo (think 300VA) have a bit more mechnical hum than the corresponding Toroidy's (have built T2 psus with trafos from both). Not a dealbreaker if you're not sitting absolutely next to the psu box. Also, if you go with 3 trafos (I think that's what's in Kevin's original chassis?) I think if you spread the load none of them needs to be more than 150VA each, which should sort that problem.

Good riddance

10m90s in stock at Mouser; currently 2237 of them. Go get 'em while they last.

They are probably genuine if it was long ago, but may not necessarily have been new/unused. Anyway, replacing those and seeing if you get a clean signal could be an easy first check. Where do you connect to ground for the SE output? Needs to be from signal ground if I remember correctly; Kevin had some very clear instructions on that early in the thread.

Since you're using a GRLV, dirty power would be unlikely I think. I would replace those transistors for starters. Mpsa06/56 are in stock at least at Mouser.

True. Will keep supply voltage low and bias reasonable.

So, if all goes well, I'm picking up a pair of Quad 2805s next weekend, which means I have to build an appropriate amp for them The Uberamp I have boards for and that's probably what I'll build, but I'm wondering if a cfp3Large (with the Sanken output boards) would be a good fit also? Or is that a less good match?