Gary Pimm's self biasing CCS - parts

[jkeny]

Can the IRF1820 Mosfets be replaced in this circuit as I can't find them or datasheet.

What part would be most suitable & what component value changes would be needed?

 

[nerdorama]

Mouser & Digikey

It's IRF820 (rather than IRF1820) and they are in stock at both of these distributors. I've built some of Gary's CCS's and they work great.

Good luck,
John

 

[jkeny]

Thanks John,
I was actually using another schematic that read IRF1820 - doh!

 

[AndrewT]

Could you explain the difference in operation for the pentode vs the mosFET connection options?

 

[jkeny]

Sorry, Andrew,
I'm just a worker bee - I don't know the how's of it!

 

[bobgroger]

Could you explain the difference in operation for the pentode vs the mosFET connection options?

Andrew, scroll down on this page....
http://www.pacifier.com/~gpimm/self_bias.htm

Bob G.