[GreenKeys] inexpensive loop supply transformer wanted

Mike Douglas deramp5113 at yahoo.com
Sat Dec 21 13:35:34 EST 2013


I'll be joining you with a similar project early next year. I'm going to build a board to provide the current loops for a model 15 and to provide baud rate and baudot/ascii conversion so I can use the model 15 as a console with my vintage computers.

Mike


> On Dec 20, 2013, at 11:56 AM, paul <paul at solvara.com> wrote:
> 
> I'm working on a small project to have a Single Board Computer such as a Raspberry Pi or Arduino drive my TTYs (Model 15 at 45 WPM and a 28 RO at 75 WPM) with some canned messages from memory.  As part of that effort I'd it to have it's own loop supply (120VAC to 120VAC isolation transformer, bridge rectifier, filter cap, 2800 ohm 20 watt limiting resistor).  Does anyone have suggestions on where I might find a low cost isolation transformer for this purpose?
> 
> Paul Newland, ad7i
> 
> 
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