Oh! I was waiting for the on-board carbon version too.

 

If it is not going to happen,  which of the current version is  more stable? 

 

I can build one but trouble shooting is a bit out of my league.

 

Sam

What? Troubleshooting is the fun part.

Probably doesn't make too much sense going to onboard heatsinks the size of the 727...

 

Any idea when the boards will reach a stage suitable for a board run?

 

Btw: What version are you using for your carbon builds birgir? Which amp board? Which servo? which Psu?

All my boards are custom and for my own use only. 

Edited June 24, 201511 yr by spritzer

+/-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. 

 

Hi Kevin and Birgir:

 

Is there an off-board KGSSHV Carbon version that is tested, finalized and available to the public? If so and if there is enough interest, I can help run a GB. 

 

Thanks! 

Edited June 24, 201511 yr by mwl168

the tested board is kgsshvcarbonv1.zip

 

this is the original board with the original limited servo and the adjustment pot.

 

joamat has tested the left and right versions of the boards.

the Kerry servo an the joamat servo boards have not been tested.

 

birgir thinks the extra servo is not necessary because the amp is extremely stable

without all the extra parts.

@mwl168: I'm in for two sets

I would be in for 1 set for sure!

http://gilmore.chem.northwestern.edu/boards/kgsshvcarbonv2.zip

 

this is the version 1 board above with the cascode current sources and 4 of the transistors replaced with pzta

series parts.

 

not tested, but I would have to be an idiot to mess this one up.

(someone should check)

Has anyone had a chance to compare the SiC KGSSHV with either a Blue Hawaii or DIY T2?  If it is comparable but significantly easier to build and using less energy (less heat) that would be something!

/

Edited November 12, 201510 yr by JoaMat

@mwl168: count me in  for one set,

 

if it is going to happen

@mwl168: Count me too for one set

@mwl168: Two sets for me. Are you thinking of doing the SiC PSU?

I do intend to include PSU in the GB. Not sure if to go with the KGSSHV PS Sic version or the GoldenReference HV version.

In any case, maybe I should start a thread for the GB and move these discussions over so we don't clog this thread.

Just got back from a business trip. Give me a couple of days and I'll get a GB thread started.

Edited June 25, 201511 yr by mwl168

Please include me in the GB for 1 set including PS.

I'd like to hear Kevin's or Birger's opinion on which PS has the higher potential for powering a TOTL Carbon.

I have one of two Carbon 0.9 version boards about done, and my latest parts from Mouser arrived today. I leave tomorrow on a business trip, so powering up my pre-production Carbon with my KGST PS is still weeks away.

Edited June 25, 201511 yr by Laowei

/

Edited November 11, 201510 yr by JoaMat

I'd have to agree with you there.    The Carbon just does everything right... 

 

Edit:  I should look into sleeping at some point...

Edited June 26, 201510 yr by spritzer

Where can I get some 440k resistors?. I have had to make up my divider with a series of resistors 

and it don't look pretty.

Thanks

Les

I'd have to agree with you there.    The Megatron just does everything right... 

Not the Carbon?

birgir's brain is on free-run after building 6 x carbons...

 

pick the closest thing you can get to 440k and then recalculate the other resistor

 

or pick numbers for 2 resistors that add to 880k

 

it does not have to be super exact, the voltage will be slightly off, no big deal

Edited June 25, 201511 yr by kevin gilmore

Thanks Kevin,

Yes that's what I did when ordering my bits. And being a PIA I wanted very close to 450v but with tolerances

I ended up with 469v. Guess I will just make do with what I have and correct it some time later .

My build of amps and PSU went well all going and no hitches or smoke.

Thanks again for your efforts and that makes 5 out of 5.

Now back to the T2.

Edited June 26, 201511 yr by iwik

One question regarding Golden Reference power supply. Using FQFP8N80C instead of C2M1000170D - will that affect performance, else than heat capability?

The FQFP8N80C part should work fine, though the SiC part is desirable.

I'm interested in the results. Let us know.

the 469 volts is a bit high, time to trim one resistor a bit