[Elecraft] Re: K2 battery switch

[Ingo Meyer DK3RED]

Hello Norm and Sverre,

THERE ARE switches with the same footprint and the same outfit like the
original one. I have found one here in Germany by Conrad Electronic.
Put the number 708330 in the input area named "Artikelnr.-Suche" on the top
of the main page by www.conrad.de and press enter.

Picture: www1.conrad.de/xl/7000_7999/7000/7080/7083/708330_BB_00_FB.EPS.jpg
Type: Marquardt 4021.0801

Think the supplier will also send you a DPDT to the USA, but the cost for
s&h from Europe to USA are high. Norm, I think you will find also a DPDT in
your country. Maybe Radio Shack sells these ones.

I did something similar like Norm want to do. But I have bypassed the
polyswitch and not the in-line diode and the resistor. The diode and the
resistor are substituted totally in my K2 with a wire. You DON'T replace the
original SPDT for my modification.

I'm so sorry, but at the time I have some trouble with my internet provider,
so I have no access to my webspace. No, I have payed my bill (grin). I try
to describe my modification. Please read the posted mail (TNX Sverre) from
me and look at the K2 schematic. The both lowest pins on S1 (Power) have in
the original no contact to the rest of the circuit. The first wire goes from
the lowest pin on the left side of S1 to + on P3 (Aux). The second wire goes
from the lowest pin on the right side of S1 to the connection of C196 and
D10 (+ pin of J3 - the supply jack).
-- 
72/73 de Ingo, DK3RED   Don't forget: the fun is the power!

    dk3red at t-online.de   www.dk3red.homepage.t-online.de (out of order)
      DL-QRP-AG   #824   www.dl-qrp-ag.de
       QRP ARCI #11295   www.qrparci.org
         DARC #2360404   www.darc.de

Sverre Holm wrote:
> Didn't DK3RED do something similar some time ago? 
> 
> Take a look at
> http://www.ac6rm.net/mailarchive/html/elecraft-list/2002-06/msg00829.html.
> He used instead the on-off switch of the K2 with its DPDT function to bypass
> the in-line diode for charging of the internal battery when the K2 is turned
> off. Unfortunately I cannot get his homepage to work right now so I cannot
> find the details.
> 
> 73
> 
> Sverre
> LA3ZA
> http://www.qslnet.de/la3za/
>  
> 
> 
> -----Original Message-----
> Sent: 20. oktober 2005 02:17
> Subject: [Elecraft] K2 battery switch
> 
> Greetings!
> 
> I am finishing up a new K2 with internal battery and would like to use a
> DPDT switch in place of the supplied one so that I can either connect or
> bypass the in-line diode and resistor in the battery wiring depending on
> what power supply I am using.  Has anyone found a substitute DPDT switch
> that matches the footprint of the stock one? Thanks
> 
> 73,
> N7NSD
> Norm