[GreenKeys] Jack Selection for TTY equipment

[Frank Carraro]

            Just becuse a plug will fit in the jack does not mean the jack
is suitable for the purpose you intend.   Most long frame jacks found in
surplus sources are for telephone or audio uses.  The spring arrangement of
telegraph jacks is entirely different from telephone jacks and the "loop'
or "set" functions cannot be wired with telephone jacks, just as  the normal
back-to-back connection of telephone jacks (Line/Drop) cannot be wired with
telegaaph jacks (generally).  In addition of course,  three conductor (TRS)
jacks are telephone use, but can be used for audio stuff, while no telegraph
jacks are made with three conductors.

Frank
  -----Original Message-----
  From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net]On Behalf Of hwhall at compuserve.com
  Sent: Sunday, November 17, 2013 10:53 PM
  To: greenkeys at mailman.qth.net
  Subject: Re: [GreenKeys] Jack Selection for TTY equipment


  FWIW, my local surplus store (OEM Parts) has a tray full of long frame
jacks that take 1/4 inch plugs. They were in my way constantly when I was
looking for the smaller 0.206 inch version for Jeff (WA6FWI). And they are a
LOT less than $11 apiece. They also have a lot of the 303A plugs, NOS in
original plastic or some mounted on cables.



  Wayne

  WB4OGM


  -----Original Message-----
  From: Jeffrey D Angus <jdangus at att.net>
  To: greenkeys <greenkeys at mailman.qth.net>
  Sent: Sat, Nov 16, 2013 3:54 pm
  Subject: Re: [GreenKeys] Jack Selection for TTY equipment






Pricey, but they'll outlive us all.
  <http://www.mouser.com/ProductDetail/Switchcraft/MT334BX/?qs=sGAEpiMZZMv0W
4pxf2HiV4UhZgoPcadETa5kifJsDRk%3d>
  The Switchcraft 3 conductor (TRS) bushing mounted (as in
  patch panels and telco stuff) with two N.C. leafs for the
  tip and ring respectively. This allows for shorting when a
  plug is removed.

  And yes, 1/4" plugs fit just fine. Both W.E. Mil and Radio
  Shack.

  Jeff-1.0
  wa6fwi

  ______________________________________________________________
  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



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20131118/af3eb223/attachment.html>