You will find that the piece of coax (shorting stub ??) length is
critical. It took a
couple of iterations before I got a reasonable match.
The I bought a 5 el M2 beam and junked the thing !!
73, Dick, W1KSZ
On Sat, Feb 4, 2012 at 3:17 PM, Jim Brown <jim@audiosystemsgroup.com> wrote:
> On 2/4/2012 11:27 AM, K. Alan Robbins wrote:
>> Make the vertical radiator longer to try and get it down to the bottom of
>> the band
>
> That's a good solution. The difference between the top and bottom of
> the band is about 8%, so I would start by making the radiator 7% longer.
> That is, measure the current length, multiply that by 1.07, and try that
> for the total length. Be prepared to prune it to length, like any other
> antenna.
>
> Don't worry about perfect VSWR, but when you get the resonance (as
> indicated my minimum SWR) to where you want it, then try playing with
> the tap on the ring (if it's adustable).
>
> 73, Jim K9YC
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|