[Elecraft] Automatic 1:1/4:1 Balun switching under K3 control?

[Robert Tellefsen]

This idea is right on the money, Wayne.
I use simple dipoles with tuned feeders,
and have to manually throw the slide switch
from one band to the next. This idea would
be a real help in automating my contest
station.
Thanks and 73
Bob N6WG

----- Original Message ----- 
From: "wayne burdick" <n6kr at elecraft.com>
To: "Leigh L Klotz, Jr." <Leigh at WA5ZNU.org>
Cc: "Elecraft Reflector" <elecraft at mailman.qth.net>
Sent: Thursday, December 20, 2007 12:00 PM
Subject: [Elecraft] Automatic 1:1/4:1 Balun switching under K3 control?


> Leigh wrote:
> 
> > This is great! I had been meaning to ask because I have use a 
> > switchable BL2 ony my big loop and had no way of knowing what the KAT3 
> > was doing in the 1:1 and 4:1 positions, other than how long it took to 
> > find a match.
> 
> This is certainly one excellent use of the KAT3's LCSET mode, Leigh.
> 
> You've also given me an idea for a "BL3": Same as the BL2 but with a 
> relay rather than a switch for selecting 1:1 vs. 4:1. We could then use 
> one of the K3's spare output lines (say DIGOUT1) to switch the relay 
> under firmware control, per-band. There would be one wire running from 
> the AUX I/O connector to the BL3, and you'd need to power the relay 
> from the K3's switched 12 VDC accessory output.
> 
> If this is of interest, I'll ask the BL2's designer to take a look at 
> it. I have the same problem myself, so I already want two :)
> 
> 73,
> Wayne
> N6KR
> 
> > On Thu, 20 Dec 2007 10:55 am, wayne burdick wrote:
> >>
> >> If you're ever curious about the actual L and C values used in the 
> >> matching network, you can check them using a special setting of the 
> >> KAT3 menu entry (in the CONFIG menu). Just set KAT3 to LCSET, then 
> >> exit the menu. Next, tap "ATU TUNE". This will display the present L 
> >> and C values.
> >
> >
> 
> ---
> 
> http://www.elecraft.com
> 
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