Lloyd:
From a pretty old posting:
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Date: Fri, 21 Sep 2001 10:19:20 -0500
To: [EMAIL PROTECTED]
From: Tom Hammond NØSS <[EMAIL PROTECTED]>
Subject: [Elecraft] K2 Coaxial Power Connector - More info
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Reply-To: Tom Hammond NØSS <[EMAIL PROTECTED]>
Rod Cerkoney, N0RC, wrote:
The plug is 5.0/2.1mm OD/ID respectively. RS has them, but I don't
have the P/N. In store packages have size marked on them. The part
Elecraft supplies is from Switchcraft and is available from Digikey
part number: SC-1052-ND (I think the Switchcraft item is of superior
quality).
The Connector in the radio (probably Switchcraft) is Digikey item:
SC1155-ND
Digikey online page for these items is:
http://info.digikey.com/T013/V5/177.pdf
Note: The URL above no longer works!
More info:
Switchcraft #S760, Mouser part #502-S-760
Technical specs: ID .080" (2.03mm), assume 2.1mm
OD .218" (5.5mm) See NOTE below
Barrel Length .375" (9.52mm)
Note: Switchcraft does not list a 5.1mm (0.20") diameter
barrel coaxial power connector. It appears that ALL
of their coaxial pwr connectors are 5.5mm (0.218")
in diameter.
I used a caliper to confirm the outside diameter of
the barrel of the plug I'd received from Elecraft.
0.218" (5.5mm) on the button.
For more info on this Switchcraft connector, go to:
http://www.switchcraft.com/
and search for "S760". The plug dimension specs are at the bottom of this
page, and if you click on selection #2 (760/S760) from the list at the top
of the page, you can download a single-page PDF which shows to detailed
engineering drawing of the plug, with references which will match to the
specs on the page noted above.
I believe this to be the power plug which we are using on our K2s and K1s.
They ARE better quality than the plugs available from R/S, if for no other
reason that the fact that the center cunductor of the Switchcraft plugs is
slightly recessed within the insulator, thus making it more difficult to
accidently short the positive lead to ground.
The apparent R/S equivalent (at least with regard to dimensions, NOT
quality) is their 274-1569 (5.5 x 2.1 mm).
The apparent DigiKey part #'s are:
Plug SC-1052-ND (as Ron has stated)
Socket SC-1153-ND (the SC-1155-ND is SMT)
NOTE that the 1998 DigiKey catalog from which I got this info had the
Switchcraft part #'s for the plug and jack SWITCHED. However the DigiKey
web site (www.digikey.com) had everything listed correctly.
Users are urged to RETAIN this information for the future when you will
surely need it. And WILL eventually need it... almost guaranteed!
Thanks Ron,
Tom Hammond N0SS
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