[GreenKeys] Loop supply options

[epvgk at limpoc.com]

On Sat, Sep 07, 2019 at 11:53:37AM -0600, Jordan Spencer Cunningham wrote:
> To me these are pretty cheap, but only because I couldn't seem to find anything suitable under $100. 
> 
> I looked and looked on Mouser and Digikey over a year ago to find a suitable power supply, but I must have missed this one. I ended up getting a much larger supply (5 amp!) for something like $130 from a Chinese manufacturer (it's worked great in spite of the dangers we all know are inherent when getting junk from over there). Complete overkill, yes. I wanted to use the supply to power many parallel loops and a few tape punches, though. Even then it's still overkill.
> 
> By the way, does anyone know what kind of current a typical tape punch draws? A Model 19 punch or 14 reperforator, for example? I have a few I intend to get into service sometime soon, but I have not yet experimented with them much.
> 
> -
> Jordan Spencer Cunningham
> teletype.net

The Model 19 tape punch draws a little over 200 mA, or at least mine does. It's quite a
light show running off one of the old thyratron power supplies putting out that much
current: 

https://www.youtube.com/watch?v=fxy2Ifo8Xx0

eric

> 
> 
> On Sat, Sep 7, 2019, at 10:49 AM, Steve Garrison wrote:
> > A little expensive, but they have worked flawlessly!
> > 
> > Steve G./N4TTY
> > Sent from my iPhone
> > 
> > > On Sep 7, 2019, at 12:39 PM, John, W9DDD <w9ddd at tapr.org> wrote:
> > > 
> > > That's the one from Mouser I found earlier, I just didn't recall the exact price.
> > > 
> > > John, W9DDD
> > > Ich habe dreimal abgeschnitten uns jetzt zu kurtz. (I cut it off 3 times and it's still too short.)
> > > 
> > >> On 9/7/2019 10:31 AM, Harold Hallikainen wrote:
> > >> When I finally power up my Teletype, I plan on using this as a loop supply:
> > >> https://www.mouser.com/ProductDetail/International-Power/IHB120-02?qs=MKoP7Oyr0W4tUbkG3QpCWg%3D%3D
> > >> Harold
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