[Elecraft] K3 and IC- 2KL; negative voltage modification

[Andreas Junge]

Roland,

There are two pieces you need:

BCD to individual band decoder:

http://www.unifiedmicro.com/decoder.html

And the voltage divider to generate the voltages per band:

http://www.qth.com/topten/apnote3.htm

I hope this helps,

Andreas, N6NU
Menlo Park, CA


> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net [mailto:elecraft-
> bounces at mailman.qth.net] On Behalf Of DC1RS
> Sent: Monday, December 15, 2008 1:23 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] K3 and IC- 2KL; negative voltage modification
> 
> 
> I would be also very interested in the interface you will use for band
> switching of the 2KL.
> I use an AT500 tuner and I'd like to do the bandswitching from the K3, but
> i
> couldn't find any
> decoders in the web.
> 
> 73 de Roland, DC1RS
> 
> 
> Ron N9RC wrote:
> >
> > I use the K3 with a 2KL.  I have the parts for auto band switching
> (decade
> > band info convertor) but have yet to build it.  The max power setting I
> > use is 25 watts for 500 watts out but have to watch the K3 power
> closely.
> > The 2KL trips out easily when over driven and depending on band, mode
> and
> > antenna SWR (worst case 1.5:1) I have to reduce the K3 power to as much
> as
> > 12 watts to avoid trips.  I believe the K3 "may" have  a power spike on
> > first sylable that causes some of the trips.  I do not use ALC but as
> > things settle I may try it.  I use the MFJ 600 watt auto tuner with the
> > 2KL and generally it works quite well.  I was not happy with a AT-500 I
> > had.
> >
> > Ron, N9RC
> >
> >
> >
> 
> --
> View this message in context: http://n2.nabble.com/K3-and-IC--2KL--
> negative-voltage-modification-tp1617415p1660062.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> 
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