[GreenKeys] TTY Loop Supply

[Chris Elmquist]

Jack reported that often there is a switch to reverse polarity but this
unit doesn't offer that.

I wired all my stuff with TIP=POSITIVE so I was getting a little nervous :-)

Chris N0JCF

On Monday (04/28/2014 at 03:33PM -0600), Paul Heller wrote:
> Yes, I had the same question!
> 
> Paul
> W2TTY
> 
> On Apr 28, 2014, at 3:14 PM, Chris Elmquist <chrise at pobox.com> wrote:
> 
> > On Sunday (04/27/2014 at 11:29AM -0500), Jack Hart wrote:
> >> For those of you who are "loop supply challenged"...
> >> 
> >> 
> >> 
> >> see Ebay  171309209986
> > 
> > Interesting.  I note the "TIP NEGATIVE" notice on the front panel.
> > Was that any sort of convention or was the rule that you just had to
> > state what the polarity is?
> > 
> > I guess I'm familiar with other wiring where tip was positive...
> > 
> > Chris N0JCF
> > 
> > -- 
> > Chris Elmquist
> > 
> > ______________________________________________________________
> > 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

-- 
Chris Elmquist