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

[Virgil Bierschwale]

might have to.

got too many irons in the fire right now.

thanks,

virgil
N5IVV


On Fri, Sep 6, 2019 at 7:48 PM Steve Garrison <steve.n4tty at gmail.com> wrote:

> Why not make a loop supply.  I have multiple supplies as they are that
> difficult to implement.
>
>
>
> Steve G./N4TTY
>
>
>
> *From:* greenkeys-bounces at mailman.qth.net <
> greenkeys-bounces at mailman.qth.net> *On Behalf Of *Virgil Bierschwale
> *Sent:* Friday, September 6, 2019 7:32 PM
> *To:* Paul Heller <paul0926 at comcast.net>
> *Cc:* GreenKeys <greenkeys at mailman.qth.net>
> *Subject:* Re: [GreenKeys] off the shelf power supply for model 28 loop
> supply
>
>
>
> Thanks
>
> I have a Hal ct-2200
>
> Not sure if it works
>
> But the manual says it doesn’t have a loop supply
>
>
>
> I just bought one of his boards
>
>
>
> What I want to do is have a arduino or raspberry send txt messages to the
> model 28 for alarms on solar and aquaponics when an error occurs
>
>
>
> Maybe the simplest way is to wait for a Hal st-6 to show up on eBay?
>
>
>
> Or something along those lines?
>
>
>
> On Fri, Sep 6, 2019 at 6:23 PM Paul Heller <paul0926 at comcast.net> wrote:
>
> 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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