Not really, I simply haven't run out of the prototype boards yet.  It is also far more limited and intended to be run at just +/-400V.  Only IXYS CCS and only matched K170 input fets too.   There is also the issue of close proximity of the traces so careful soldering is a must have with those boards. 

Birgir are there any other changes besides the local/global feedback removal?

Some layout changes and the small transistors have been changed to what should be available for the foreseeable future. 

 the small transistors have been changed to what should be available for the foreseeable future. 

 

now where have I heard that one before?

/

Edited November 12, 201510 yr by JoaMat

Are you recycling your T2 power supply for this? What are your thoughts?

What revision offboard are you using? I don't see any 4686's populated just 2 big transistors on each board.

Nice... so how does your version of the carbon sound JoaMat?

His version is the same as mine, I just did the same thing on the PCB level.   

 

now where have I heard that one before?

 

You know me, I like to tempt fate... 

/

Edited November 12, 201510 yr by JoaMat

Please grace us with some closeups, I have a set of v0.4 offboard pcbs which I'd love to modify into a kgsic. Less heatsink holes to drill+tap too

Just leave out the last stage.  The CCS is changed to a 10M90 (same pinout as the other IXYS part) and use 300 and 1K resistors.  The 2SC4686A is changed to the SiC FET

Man, I am having a hard time keeping up with you guys!

This looks interesting!

Joamat, do you have any comparison with a conventional kgsshv, a kgst oder a bhse? New star sounds like better than BHSE?

/

 

Edited November 11, 201510 yr by JoaMat

I have the hakko version of that desoldering gun. One of the best things I have ever bought

Edited January 25, 201511 yr by eggil

next version should have a tube ccs driving the sic...

 

ripping up my offboard boards now, so excite

I also had to change the resistor in series with offset trimmer.

 

What value did you end up with? 

/

Edited November 11, 201510 yr by JoaMat

Wonder when Cavali will go from mosfets to SiC's....

when sales of tle ll2t drop to zero.

but he is still going to have to do a major redesign to get that

to happen

Actually I shorted them out. Have just measured the trimmers setting - 360 and 400 ohms.

 

Thanks for that.  Better use a smaller pot then and something in series.

JoaMat, I’m curious as to what temperature your seeing with the carbon.

42 deg C (107 deg F), temperature raise 20 deg C (36 deg F). Heat sinks are Modushop 200 mm x 80 mm, voltage +/-500 V.

Thanks JoaMat.