[GreenKeys] Loop power supplies

[Jeffrey Angus]

On 3/4/18 9:01 PM, drlegendre . wrote:
> IOW it's not a constant-current supply, but rather a high
> voltage (~300V) current-adjustable supply.
That is correct.
> Ultimately, its behavior isn't much different than that of a
> simple passive rheostat - nor am I exactly sure what advantage
> it provides over the former.
Actually there is.
This difference is small, but using a vacuum tube as a variable
resistor allows the rise time of the current through the selector
magnet rise a little bit faster.




-- 
"I am a river to my people."
Jeff-1.0
WA6FWI
www.foxsmercantile.com