Kerry

Thanks and Happy Birthday!

Nice build!

Nice work! I wasn't planning on using the screws from the IEC to the board, just the IEC to the back of the chassis. You could also use some button head cap screws coming from the bottom up, which would be pretty flat.

Happy Birthday!

Not to my knowledge. I believe it brings the stators to a more positive voltage (closer to the 580V bias). AFAIK, this has been in the DIY T2 build from the beginning and has not caused any issues. From a volume perspective, it's not particularly loud and I can have the headphones on my head when I power down without discomfort.

There is no whistle when I power off and the power off bump is a little bit softer that it was before (a little more bass and less pop).

Yes - C3 in my schematic above. Joachim suggested a value of 6.8uF works best here. I've had it up for several hours now and and it seems very stable. I also added a 1K resistor from the -560V rail to the collector (external to this board).

Got the offset servo working. Thanks @joamat I used a 6.8uF cap that you suggested.

Always enjoyable watching you rip stuff apart

Fried Chicken and Biscuits... It was my first time for both. Nothing perfect yet. The Biscuits came out a bit better than the chicken.

Once I’ve tested everything, we can run a group buy.

It's an optional 5v regulator (LM7805CDT) to power the delay timer. You can also use an external supply for the that. I've set this up so you can use either the built in current regulator on the grhv78xxx or the 08N100D as an external regulator.

Here's the accompanying board for the GR HV & LV supplies. It's got a built-in controller to turn the HV on after a delay (if needed) along with a power LED indicator (flashing to solid). I've also added a tap for both Normal and Pro bias.

Really nice!

A question about lard... I've just bought a Lodge Cast Iron Skillet and I'm going to try my hand at fried chicken. I wanted to come here for some recommendations on the type of lard (brand names would help too). I've also bought some White Lily flour for the accompanying biscuits with gravy.

Happy Birthday!

Yes. Awesome!

I've been pretty happy with PCBWay

Really nice! Congrats

I was able to get the 450v supply up and running. I did have one error on the board. The current source feeding the 10v reference gets up to 150 degree F, but I can add more copper around it. I think it will be just fine. I was running this with a 110mA load.

Happy belated birthday

I should be able to test the low voltage version with some decent ripple at 1A a bit later in the week.

Here's the HV version set to 450v. Have to test this one still.

I used OPA197IDBVR in the GRLV micro (same here).

@JoaMat Here are some boards I drew up...