Kerry

ST micro regulators definitely need a load per the datasheet. It's a bit of a nuisance but otherwise work fine. Caps? Yes please.

I really do want one

I went ahead and built the new PS design to make sure it's stable and performs... Here's a picture of the supply set to 400V (it's just the bottom half of the PCB). I've used a few different values, but that shouldn't matter. I'm seeing about 5mV (RMS) of random noise. Could probably get that down a bit. Some of that is coming from my apartment.

Gimli: Certainty of death, *small* chance of success... What are we waiting for? I'm in

Put the screw driver down. It looks great

Mine looks right. I'd like to get the most recent rev of the boards. Also,I would be interested in the golden reference LV version if there are enough others.

Congrats

Nice I like the idea of decoupling.

I'll do one set of amp boards and one dual power supply.

The FQFP8N80C part should work fine, though the SiC part is desirable. I'm interested in the results. Let us know.

I love those boards! Thanks

Congrats! Enjoy while you figure out how to box it up

Very nice build!

That's exactly my kind of insanity

Glad to hear you sorted out the issue. As a general rule is important to lift the resistors off the board. This had caused all kind of mischief on these HV builds. Enjoy

I was also thinking it might be nice to have more room (larger diameter) for the C4. If we go with a higher value for D1. Maybe slide Q8/9 over to the right a bit. Also, the labels for AC In are set to AC360. This would work good for a 450VDC supply. I think we could use AC325 for the 400VDC supply. Antec makes some nice ones that are inexpensive.

Seems true on both of those. From the schematic R1 could go higher to 4K (reduces heat from Q6), R6 could go to 50K, C7 should be as low as possible (5pF) provided it doesn't oscillate. Also, D1 could go higher (100V - 200V). It reduces the noise floor a bit. We might need to add a protection diode across Q6 if you raise D1 to protect on Q6 power off.

Cool. I want to build this version.

Nice John

Nice John

I've been playing between the KGST and BH (I have 007 Mk I). For me, the BH has more balls especially when you use it with good tubes (XF2 for instance). I truly enjoy both and quite often choose the KGST, but if I wanted to show off for someone, I'd use the BH. I also have the KGSSHV. There is nothing wrong with it, but I don't enjoy it as much. I'm going to give the Carbon a go and I have some very high expectations there. It's all very subjective though.

I just saw the schematic for this - It's official - I've shat I love the visual from Laowei

Thanks Jim. I read and forget so much. It's nice to get these refreshers.

Nice build Wachara! It is a wonderful sounding amp. Nice oaky body.

That's Purdy