Tubes and power supply

[R.G. Keen]

>Thanks for the tip, I found it - but, of course, I found problems as
>well. Would you (or anybody) know the replacement for that obscure
>MOSFET mentioned there, NSD134? I guess any high-voltage power MOSFET
>could be used, but then again...

It's not critical. You can use any power mosfet with high enough BVds.
The IRF820 is a good one. Be sure to use the protection diodes to keep
power on/off transients from killing the regulator.

By the way, for the items on your web site you list as "stolen from 
Keen's web site", could you replace those items with links? 

I don't  post anything I really don't want known, but I do update the 
material and correct mistakes, and you will miss those. I get lots of 
mail from people about "mistakes" that are from earlier versions of my 
efforts. Finding my earlier stuff reposted other places makes me less
eager to post anything else.