spritzer

My price all in is around the 24$ mark if I'm lucky with customs. If I'm unlucky then yeah.... it hurts.

I hope you aren't running the heater wires for the CCS tubes all the way to the PSU? That would be very bad...

Around the 10$ mark F.O.B. I'm sure the TKD's are around this level as well in these quantities.

Go ahead, think big. It is certainly one of the best pots ever made.

They are much closer on the newer boards as in they are touching. For a normal KGSSHV there is no need for heatsinks on the LV stuff. Doesn't generate enough heat for it.

That board is 100% correct.

Ahhh an old school HV. So much empty space on those PCB's...

That would be a rather gigantic investment for a groupbuy....

I think just Justin and I have sold them in the past but I'm running low and Justin might be as well. I will restock at some point but I won't sell them as I will probably stop selling parts soon.

While on the subject, here is the actual Megatron Mk2...

I don't mind.

I don't think the heaters will be a problem. They are in the signal path anyway (well sort of).

It was excellent even if I all but killed my feet. According to the health app in the phone we clocked over 20km every day... I'm so tempted to come back in June that it isn't even funny.

It needs MOAR transistors...

Add to the terminal block issue if they are fake ones off ebay. Massive issues with that stuff.

You can go lower but we want the offset adjustment to be mostly done in the resistor for temp and drift. The 182R comes from my boards which naturally have a different CCS.

No that info came straight from Stax. I didn't take it too seriously though as it was so silly. Not going into a detailed circuit analysis of the T2 here but they basically took a circuit they had (SRX) and threw a bunch of parts at it to make it just about work. The BH was based on what Kevin knew about the T2 circuit so he came very close with a lot fewer parts. It can still be done with a lot fewer parts still and give better performance.

For that amount of AC it has to be the rectifiers. The soldering has to be pretty much perfect especially in the diff amp so you could be dealing with tin whiskers or something like that. Also just a cold joint would cause this as a part has shifted when moving the board.

Any engineer will call a circuit flawed it it needs that part and that part alone to function when seemingly identical or even superior parts have issues. The issue was never the ground plane as the coating on these resistors should easily handle 1kV. What the Xicon's have compared to something like the CMF60's is that they are slightly inductive. Also the T2 is a great circuit? Who in their right mind would say that? Many neat ideas for sure but far more what the fuck were they thinking bits thrown in the middle. Same could also be said about the Blue Hawaii in some ways though.

Those noise issues have nothing to do with external sources but rather a flawed circuit design.

Happy Birthday my friend and it was awesome meeting you last month.

No but a shielded transformer is a must have and keeping all the wiring away from the transformer. Here the input wires run directly next to the transformer. It must be said though that a ground plane is a better solution than running ground traces all over the boards. Both in terms of shielding and the low potential of the ground but something had to be done with people shorting out the amps. If we pull back the ground too much then it comes patchy as the part count goes up relative to the board size.

That is the cleaned up original of the PSU and you can see how all the other boards were based on this one. This is a smaller version naturally as my boards are always much smaller. The ground plane was indeed removed because people had been having issues with parts being too close and it shorting. The assembly needs to be perfect or you are in trouble. For my boards there is a heavy ground plane on both sides of the board hence the swarm of via's all over the place.

This is a place for people to learn and calling this "a perfectly executed build" needs to be called out. Trust me on this, what others had to say about this build was far harsher. I for one couldn't care less if you are selling Carbons but if you are building our designs then do so properly. That has always been the deal and the simple fact here is that this build is severely compromised. For the record, here is the original SiC PSU from February or so and what is the cap value? 400V version for the BHSE but the same circuit. Yeah some people wanted bigger and for a 3U chassis it isn't a problem but if the caps don't fit in the bloody box, use smaller caps. This PSU was also intended for the Circlotron which uses much more current, hence larger caps.

I would never use more than 330uf in this circuit which is what it was designed to use. Two 680uf in parallel gives 340uf.