[AMRadio] Switching ladder line...

[Mel Farrer]

I use W.W.Grainger open frame DPDT relays to switch my 160 meter Double Extended Zepp ladder lines, and they are not expensive.  One Zepp E/W and one N/S, originally went into a T-400 toroidal Z match to 7/8" 50 ohm coax.  The Z match was remotely controlled with RC servo motors.  I was able to operate 160, 80, and 40 that way.  I have converted the Z match to a 4:1 balun, because my activities have changed I don't use them on 80 or 40 anymore.  The tower is 850 feet from the house and the relays work just fine of 120 house power.

Mel, K6KBE

--- On Fri, 3/11/11, Paul Christensen <w9ac at arrl.net> wrote:

From: Paul Christensen <w9ac at arrl.net>
Subject: Re: [AMRadio] Switching ladder line...
To: "Discussion of AM Radio in the Amateur Service" <amradio at mailman.qth.net>
Date: Friday, March 11, 2011, 12:24 PM

Rick,

Not inexpensive, but I use pairs of SPDT vacuum relays.

Paul, W9AC


----- Original Message ----- 
From: "Rick" <rickb at tx.rr.com>
To: <amradio at mailman.qth.net>
Sent: Friday, March 11, 2011 3:10 PM
Subject: [AMRadio] Switching ladder line...


> I'm looking for suggestions on how to switch ladder line between three or
> four different rigs without having to unhook it. I would like a
> configuration similar to a four pole coax antenna switch, but using ladder
> line. I've thought of using knife switches, but would like to hear how
> others have accomplished this. I'd like to run ladder line directly to 
> each
> balanced tuner of each rig. Is anyone doing this and if so, how?
>
>
>
> Thanks,
>
> Rick/K5IAR
>
>
>
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