[Elecraft] K2 power jack

Tue Feb 25 18:42:00 2003

Thanks, David.  My plugs do not appear to have any solder lugs so I
guess it is either friction or nothing.  I do appreciate the
information.

Bruce - W8FU

-----Original Message-----
From: David A. Belsley [mailto:[email protected]] 
Sent: Sunday, February 23, 2003 5:36 PM
To: Bruce D. McLaughlin; [email protected]
Subject: RE: [Elecraft] K2 power jack

Bruce:
  The banana plugs have a "hole" in the rear to accommodate the wire (be

sure to put the plastic sleeve over the wire -- in the proper direction
-- 
first).  There are some that allow for friction connection, but I prefer

always to solder the wire into place.  The jacks have a solder lug.

best wishes,

dave belsley, w1euy

--On Sunday, February 23, 2003 1:50 PM -0500 "Bruce D. McLaughlin" 
<[email protected]> wrote:

> This is a stupid question I know, but how does one connect banana
plugs?
> I have never used them and don't have a very good idea as to how to
> secure wires to them.  There are several in the kit and I have been
> wondering about them.  I guess now is a good time to ask the question.
>
> Bruce - W8FU
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of David A. Belsley
> Sent: Sunday, February 23, 2003 1:31 PM
> To: Indy; [email protected]
> Subject: Re: [Elecraft] K2 power jack
>
> Fred:
>   Your problem, as you are no doubt aware, is almost certainly due to
a
> power cord or power feeder system with too high resistance.  Recall
that
> 3
> amps (a reasonable K2 current draw under tx) will drop 1.5 volts
through
>
> only 1/2 ohms.  To minimize this, you should use as large guage power
> cord
> as possible: at least 14 guage, and preferably 12.  The K2 plug itself
> is
> not a problem; the problem is connecting large gauge wire to it.  The
> solution is simply to use very short pig-tails, say 18 guage, only 1"
> long
> to connect between the plug and your heavier wire.  Shrink wrap will
> help
> to add some structural strength to the join between the siffer, thick
> wire
> and the thinner.  If you need junction boxes, build them with banana
> jacks/plugs to accommodate the larger guage wire or use Anderson
plugs,
> like those used with the KPA100.
>
> best wishes,
>
> dave belsley, w1euy
>
> --On Sunday, February 23, 2003 10:37 AM -0700 Indy <[email protected]>
> wrote:
>
>> Battery to K2, key down, I find significant voltage drop, sometimes
as
>> much as 1.5 volts after going through a junction box.  Note there is
>> essentially no voltage drop until current is being drawn.  At least
> part
>> of the problem I think is the K2 power jack.  It is very difficult to
>> make a power cable with HEAVY wire that will go on the tiny plug for
> that
>> jack.
>>
>> Has anyone worked with this problem?  Found a plug that will take
> heavy
>> battery wire or perhaps replaced or paralleled the jack???
>>
>> 72.
>>
>> Fred
>> kt5x
>> K2 # 700
>>
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>
>
> ----------------------------------
> David A. Belsley
> Professor of Economics
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----------------------------------
David A. Belsley
Professor of Economics