[GreenKeys] off the shelf power supply for model 28 loop supply

[Paul Heller]

Virgil,

it depends on what you want to do. If you want to only use Jordan’s board, you only need a loop supply. The problem with many dedicated power supplies is having sufficient range to set the voltage and current to the levels you need. 5 volts is not enough. Most loop supplies are 130VDC and supply 60ma, so if you can find a variable supply that gets up into those ranges you will be ok. People have occassionally posted here different supplies they have found only that work well for them.

If you want to do more, like hook it to ITTY, you will want a TU (which has a built in loop supply). They come up often on eBay or someone on this group might have a spare lying around.

TUs vary from black boxes to ones with lights to ones with scopes. Blinken lights are always fun.

Paul

> On Sep 6, 2019, at 5:07 PM, Virgil Bierschwale <vbiersch at gmail.com> wrote:
> 
> I'm finally starting to think about hooking up my teletype.
> I don't think I have the skills to build a loop supply.
> 
> Can I buy something like a 1 amp dc power supply from somebody like astron and use that?
> 
> 
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