[GreenKeys] DIY loop supply?

[Duncan Brown]

Paul,

Overkill for a loop supply, but nice to have as a general purpose, 
adjustable, HV supply.

I would add a fuse and use neons for the indicator lamps, with the HV 
lamp wired directly to the HV output. Also, the current meter is not 
going to be any more accurate than the 1 ohm shunt resistor, so it 
should be 5% or better.


Have fun,

Duncan


On 20-Mar-20 15:20, Paul Heller wrote:
> I’m thinking of building one of these for bench top experimentation purposes that I can also use as a teletype loop supply if needed. Anyone see something I’m not seeing at first glance that indicates it might not work as a loop supply?
>
> I can buy one (actually already did thanks to earlier suggestion from several greenkeyers), but I thought it might be fun to build one.
>
>
> https://tinyurl.com/r9vj7lc
>
> Now I need to look in the mirror and ask “really? You think have time for this?”   I’m afraid of the answer :-)
>
>
>
> Paul
> W2TTY
>
>
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
>
> 2002-to-present greenkeys archive: http://mailman.qth.net/pipermail/greenkeys/
> 1998-to-2001 greenkeys archive: http://mailman.qth.net/archive/greenkeys/greenkeys.html
> Randy Guttery's 2001-to-2009 GreenKeys Search Tool: http://comcents.com/tty/greenkeyssearch.html
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to duncanancy at earthlink.net