[Elecraft] Stealthy Antenna and W1CG Balun

Sun Feb 16 21:05:01 2003

My thanks to all who replied to my request some time back.  I've now got a
43 foot doublet installed in the attic. I know, I know - this is not the
best, but the XYL did choose to live in the antenna restricted neighbourhood
where we do.  My next effort will be to get a loop up outside, but I'm
waiting for warmer weather.

I'm feeding the antennas from the K2 through a small piece of co-ax coiled
into a loop to a W1CG low power balun, then through about 30 feet of 300 ohm
twin feed to the doublet.  The KAT-2 does a great job of tuning it and I can
get out on 40-10.  On 80 I get a high current warning - as expected!

The W1CG balun has the toroid mojo, and the kit put together by the New
Jersey QRP club is excellent. I learnt a nifty trick for winding toroids so
that the input and output wires end up on opposite sides of the toroid.  If
you are looking for a 4:1 current balun I recommend you check out the NJQRP
website www.njqrp.org/balun

One question I have though is what to do with the two wires joined together
on the output side?  Is it best to just leave them to float?

AC7MZ
K2#2599

> Message: 25
> From: "Mike Walkington" <[email protected]>
> To: "Elecraft Reflector" <[email protected]>
> Date: Sun, 19 Jan 2003 19:50:11 -0800
> Subject: [Elecraft] Stealthy Antenna
>
> All,
>
> I'm planning to use a short piece of co-axial cable (6-7 feet) to get from
> my K2 (with KAT2) through the wall of the house to an externally mounted
4:1
> current balun (the W1CG model).  From the balun I plan to run twin feed
> (20-30 feet) to a doublet or loop mounted under the eaves of my two storey
> house (to avoid the anti-antenna covenants).  I have some questions about
my
> proposed configuration that I'd appreciate some advice on:
>
> 1) Can anyone offer some experienced advice on how long or short the co-ax
> can be?
> 2) Is it OK to mount the balun in a plastic box?
> 3) Would you recommend a doublet or a loop?
>
> Mike
> AC7MZ
> K2 #2599
>
>