-------- Original Message --------
Subject: Re: [TowerTalk] Force12 C19XR
Date: Sat, 24 Apr 2010 12:37:51 -0400
From: Neil & Heather <neil.goodell@myfairpoint.net>
To: Natan Huffman <Natan1961@frontiernet.net>
Thank you Natan,
That was exactly what I was looking for....interesting that the.gif is
exactly the same as the picture in the back of my manual..except for the
"feed" details.(my drawing is rev.dwc19xr002, 1998)
So, the 12" x 3/4" grey pvc tube with the black and white wires
on one end ,and so-239 on other must be the Force12 "balun"..??
It would seem obvious, but with no pictures, It would still be a guess
on my part.
Other than a continuity test(tested ok),no other way to check this
balun, is there?
OK on the DX engineering balun...it is a Maxi-core current balun...
left over from another project..
part # BAL050-H10-AT (if you need to look it up on DX's website.)
I agree, it looks like the issue would be getting a short enough wire
length,
and possible interaction with the balun's metal case.
Again, thanks for info...big help....
73
Neil
AE1P
On 4/24/2010 11:04 AM, Natan Huffman wrote:
> Hi Neil,
>
> The attachment may help but I'm sure I can talk you through the process.
> Trim the length of the balun per the manual. Of course if you don't use the
> F12 balun, there's no way of knowing the needed length. At the end of each
> wire, solder a lug in place and attach the two wires with lugs to the center
> of the driven element, one wire to one side and one wire to the other side.
> Verify you are attaching to the longer 20 meter driver and not the 15 meter
> driver. There should be a jumper between the two halves of the 15 meter
> driver making the 15 driver a contiguous entity.
>
> To attach the lugs place a flat washer followed by a lock washer followed by
> the nut. Do the same for the other side. Unless you are going to stack
> your C19XR with another one, it makes no difference what is the position of
> the wires. By position I refer to the two colors of the balun lead.
>
> As far as the DX balun, I don't know nor does anyone else know unless you
> have a specification sheet. You need a 1 to 1 current balun for this
> application. The problem encountered with another balun is the lead length
> as the balun lead length becomes part of the 20 meter driver. If you are
> absolutely sure the DX balun is a current balun, just try it and adjust the
> length of the leads until you get minimum VSWR with the antenna in place.
> Don't try to get a meaningful VSWR by standing the C19XR on end or by
> putting it on saw horses because you just are too close to ground to prevent
> coupling between the elements and ground. If you can, use the F12 balun and
> you should not have to worry about anything, just be sure the leads length
> complies with the manual.
>
> Good luck and have fun too.
>
> 73
>
> Natan W6XR
> Freeville, NY
>
>
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