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GB for Salas SSHV2 regulator

You should use high power very well sinked Mosfets, not the standard ones. Rather the IRF640 & 9640 variety. Thermally inefficient especially on the CCS Mosfet that will have to run the Ih current plus some margin across a minimal 7V in-out drop.
 
Sent my money and a request

THANKS very much to you and of course to the sainted Mr. Salas for this!

Would you show a picture of a suitable heatsink for the project? I have no idea how to size a heatsink and would like a baseline of what I need to get.

Take care,
 
Got the payment Rick, do you have a target voltage and current? It will depend on that to a degree. I would think a 3 x 4" one with 1 1/2 fins would be a good guess. Bigger is better here. The one I used in post one was too small.
 
I also have the following for .50 USD each shipped, one per board allowed if you guys are interested in them. People who previously paid, let me know if your interested.
I have not used it personally, other than using a mass of them to tune a speaker cross over.


.33uf GE cap

If you want them, put it in the paypal notes. Thanks.
 
Rick, I don't feel confident enough using the calculators to give totally reasonable advice,
but 300v @ .035A gives 10.5Watts. So assuming a bunch of thermodynamics I never took in college, I would guess something that can shed 15 watts or more.

Volts Watts Amps Converter Tool Calculator

The heatsink calculators I have not figured out yet - but it would be nice to include some calculations in a revised build guide, or in Post 1 for example (which I can edit)

I often use CPU heatsinks from Surplus dead servers, and if it requires more than that, I use the Arctic Thermal epoxy to bind them together.