[GreenKeys] Loop supplies or selector magnet drivers

[Jordan Spencer Cunningham]

Where are you looking for your resistors? I got a bunch I'm using in my
current loops from a local electronics shop (which has since burned down--
RIP RaElco!) for something like 80 cents or $1.00 each. I know there are
lots of online shops ranging from eBay to DigiKey to Amazon to more obscure
shops that sell these for no more than a couple of dollars each plus
shipping, especially if you buy in bulk.

Oh, and Jeff just got you some example links.

As for loop power supplies, I'm using something much like this 0-150VDC
generic power supply unit to drive two loops right now. It can supply a
ridiculous amount of current, so I could drive many other loops with this.
I plan to power my M19's tape punch with it eventually. Yes, it's from
China, and I know a lot of people avoid Chinese junk like the plague, but I
took a chance on this one and have been extremely pleased thus far. I did
not open it up to see the quality of components they used. It's been in use
on my M15 and M19 for coming up on a year now without any problems. Link:
https://www.ebay.com/itm/AC100-120V-to-0-150V-DC-Output-Adjustable-500W-Switching-Power-Supply/183491922118

On Mon, Oct 29, 2018 at 11:59 AM W9DDD <w9ddd at tapr.org> wrote:

> Wonder what people are using these days loop supplies and keying the
> loop or selector magnet directly.  I was thinking of going old school
> with 120 VDC and a series 2,000 ohm 10 watt resistor. But, looking at
> the prices for 10 watt resistors, I'm re-thinking things.
>
> I might get lucky with something already being in the LESU of the
> pending 28, but I'm not counting on it.  I'm trying to get setup so all
> I have to do is plug it in when the 28 arrives.
>
> --
> John, W9DDD
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