[GreenKeys] DIY loop supply?

[Bill Horne]

On 3/20/2020 3:55 PM, William Wuttke wrote:
> Paul,
>
> Here’s my version of a DIY loop supply. Switchable resistors for 20, 
> 30, or 60 ma. 0-125 VDC. I used this for testing my TT-192A. One of 
> these days I’ll put it in a box.
>
> Bill
> KE3BK
>
>
>
>

I've had good results using 7805 linear regulators in "constant current" 
configuration, with the addition of a reverse-biased diode across the 
output to prevent damage from inductive kickback. FWIW. YMMV.


Bill, W4EWH

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