[Elecraft] BNC To Twin Lug Adapter

[Craig Rairdin]

For Field Day this year we had a 130' dipole fed with 300-ohm ladder line
running to my KAT100 through a 4:1 balun and it worked great on all bands.

We talked about feeding one side of the antenna to the K2 and attempting to
load it up on 160m but never got around to it. We would've needed some kind
of RF ground which we didn't have set up.

Craig
NZ0R

-----Original Message-----
From: Don Wilhelm [mailto:w3fpr at earthlink.net] 
Sent: Sunday, July 08, 2007 8:15 AM
To: Craig Rairdin
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] BNC To Twin Lug Adapter


Craig,

While you can feed ladder line directly to anything (including a KX1), 
the enclosure and whatever is connected to it can create unbalance on 
the ladder line.  The result is that the antenna tuning will change 
depending on how the KX1 couples to ground - the antenna will behave 
differently with the KX1 running on batteries compared to running from a 
power supply.

It is wise to use a 1:1 current balun to decouple the ladder line from 
those 'ground effects'.  Use a 4:1 current balun if it provides a better 
match to the antenna.  An Elecraft BL2 is ideal, it has a switch so you 
can change from 1:1 to 4:1 and use whichever matches better.

73,
Don W3FPR

Craig Rairdin wrote:
> Can you feed 300 ohm ladder line right into a KX1? Will it tune it? I
guess
> I should try it... I always add a balun.
> 
> Craig
> NZ0R
> KX1 #1499
> K1 #1966
> K2/100 #4941
> 
> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of NV9Z at aol.com
> Sent: Saturday, July 07, 2007 10:06 PM
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] BNC To Twin Lug Adapter
> 
> 
> Does anyone know a source where I can obtain one  of those BNC to twin lug

> adapters for the KX1?  I am thinking of puuting up  a G5RV fed with 300
ohm 
> ladder line.
> 
> Thanks and very 73/72!
> 
> Chris  NV9Z
> Hagerstown IN 
> www.eciqrp.org  
> 
> 
> 
> 
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