[GreenKeys] Loop supplies or selector magnet drivers

[W9DDD]

I guess I was looking at the convenience of just adding to an existing 
Mouser order (until I saw the price on the one that popped up from the 
search)

There are a couple of emporiums here that would take a little effort to 
get in the car and go look.

I used to have 2 of the big supplies that went in the back of the 19.  I 
know one of them went with the 19, but I kinda remember seeing the other 
one in the garage.  I hope it wasn't while pitching it into a dumpster.

I'm having some trouble sweeping some of the cobwebs away.  For the life 
of me, I picture what resistors I had way back when.  Perhaps I had used 
some surplus rheostats?

Thanks guys, I think I need to make a road trip to one of those 
emporiums.  I probably looked right at a bin of them my last trip, just 
didn't know I needed one or two back then.

Off to lurk in the garage.

On 10/29/2018 1:51 PM, Jordan Spencer Cunningham wrote:
> 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 
> <mailto: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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-- 
John, W9DDD