[GreenKeys] Loop power supplies

[Paul Heller]

There are two models offered.

Look even closer at the photos. The one that has two knobs only as 0-48V output. It looks like the second knob is for adjusting current.  

Paul

> On Mar 3, 2018, at 9:22 AM, Steve Garrison <steve.n4tty at gmail.com> wrote:
> 
> If you look through the pics on this item there are two pictures that show
> an adjustment knob on the right.  The other pics only show an adjustment
> knob on the left.  Is the right knob to adjust current and which model do
> you really get if you order this.  Not planning on getting one myself, but
> anyone that is might want to clarify with seller.
> 
> Steve G./N4TTY
> 
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net
> [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of epvgk at limpoc.com
> Sent: Saturday, March 3, 2018 9:35 AM
> To: Jordan Spencer Cunningham <js at cunni.co>
> Cc: Green Keys <greenkeys at mailman.qth.net>
> Subject: Re: [GreenKeys] Loop power supplies
> 
> I use a generic ebay one like this:
> https://www.ebay.com/sch/i.html?_nkw=112632873298
> 
> Mine will adjust considerably higher than 120vdc, and puts out enough
> current to run a couple of loops and the M19 tape punch at the same time. 
> 
> 
> On Sat, Mar 03, 2018 at 01:51:39AM -0700, Jordan Spencer Cunningham wrote:
>> For those of you who have aftermarket ~120-150v DC power supplies for 
>> your loops, can you share where you got them? If something is 
>> commercially available at a reasonable price, I will elect that route, 
>> but I'm still interested in custom designs. I've read of a very simple 
>> one I may try if nothing else.
>> 
>> I have an original 20ma loop power supply built into my Model 19 
>> table, but I'd like to get more compact versions for mobility's sake. 
>> Plus I'd like to be able to operate more than one loop at a time.
>> 
>> I've been doing research on regulated supplies from parts stores like 
>> DigiKey, Jameco, and Mouser, but there's unfortunately not much that 
>> meets the necessary criteria that I've been able to find. Acopian 
>> makes more obscurely voltaged supplies like this, but not for less than
> $200.
>> 
>> Thanks much.
>> 
>> --Jordan
> 
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Paul
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