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Date: Mon, 07 May 2001 17:46:52 -0400
From: "David A. Belsley" <belsley at bc.edu>
Subject: Re: [Elecraft] Size of the DC plug for K2

- --On Monday, May 7, 2001 7:55 PM +0100 "J. Ellis" <jellis at viaccess.net> 
wrote:

>
> I think you are referring to the female plug which goes
> on the end of the power cable that plugs into the male
> socket on the K-2.

I guess a lot of us got into ham radio because of a basic confusion on 
these matters.  Oh well.

In any event, you can't always tell which plug is right simply by trying. 
There are a number of outer and inner diameters, but the 2 x 2 combo of 5.0 
and 5.5 vs. 2.1 and 2.5 are all available.  And a 2.1 socket will 
accommodate both 2.1 and 2.5 plugs, although the 2.5 over a 2.1 can be 
problematic at times.  Also, many 5.0 sockets will accept a 5.5.  So the 
best thing is indeed to know what was intended.  The Elecraft manual only 
specifies the inner diameter (as 2.1).  My measurement for the outer 
diameter of the hemaphroditic plug they sent was 5.5 mm.  Now, I wonder 
where my wife went.

best wishes,

dave belsley, w1euy
>
> You find the correct plug that fits your device by plugging in
> the appropriate cable and then you can choose the correct
> model plug from their retail packaged selection. Take your
> K2 in, and you'll find the correct one in no time!
>
> One thing to remember though... The DC plug that Elecraft
> furnishes with the K1 or the K2 has a bit more of a recessed
> center than the ones you buy from RS. All this means is that
> it's easier to short out the RS models than the kind that
> Elecraft supplies. Make sure the 12V supply is switched off
> before plugging and unplugging. (you should do that anyway!)
>
> Good luck,
> John, NP2B
> K1/426, K2/1645
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Date: Mon, 7 May 2001 18:39:38 -0400
From: "Jay Rutherford" <w1emt at together.net>
Subject: Re: [Elecraft] Size of the DC plug for K2

Hi Bob,

The 2.1 mm is the inside diameter; I think the outside is 5.5 mm.

Before you grab that plug at RS, consider that the one that came 
with the K2 is specified for fairly high current, I think 6 amps. If you 
compare the plugs, you'll see the difference immediately. 

I use a bunch of different plugs myself, but I thought I'd mention the 
higher current model since Elecraft went to the expense of 
supplying them. I had never known there was a difference.

73, Jay


K1UC in Waterbury Center, Vermont, USA
GRID FN34 Email: K1UC at AMSAT.ORG  K2#1034
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Date: Mon, 7 May 2001 22:40:45 -0600
From: "Rod Cerkoney" <n0rc at hotmail.com>
Subject: Re: [Elecraft] Size of the DC plug for K2

Folks,

Switchcraft plugs are available from DigiKey:
http://info.digikey.com/T012/V4/167.pdf

Power Plug .08" Black Handle (2.1 mm Dia.)
DigiKey #: SC1052-ND
2.92 price each
2.19 10-25 QTY
2.01 25 QTY
S760 SwitchCraft number

I believe this is the same part supplied by Elecraft. (I hope so I
ordered 10 this weekend! ;-)

Another nice thing about this item is the large shell that accommodate
bigger wire sizes.


73, Rod N0RC
Ft Collins, CO
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