I use a Stackmatch to feed dissimilar antennas in order to spray RF in two
directions.
For example, during this past Sweepstakes, I fed a tribander at 60' pointed
NW along
with a different type of tribander pointing NE. Both with different
types/lengths of
feedline.
All worked well, but despite claims, the Stackmatch did not evenly
distribute power
to each antenna. In my case, 600 watts to one antenna, and 350 watts to the
other.
This is probably by design, since I know of no broadbanded device (1.8-30
mHz) that
can effectively distribute to vastly different loads.
However, the Stackmatch did keep my amp happy by presenting it with a nice
VSWR.
Someone on this reflector (I forgot who) mentioned that the Stackmatch has
proven design flaws. Could someone elaborate on them?
73,
Larry K4AB
On Mon, Nov 22, 2010 at 3:29 PM, <john@kk9a.com> wrote:
> I installed a StackmatchII+ a week ago on my 40m beams at 160' and 75' and
> I
> tested it out thoroughly during the Sweepstakes contest this weekend. In
> nearly all cases, BIP was better than BOP so I rarely used BOP.
>
> John KK9A - W4AAA
>
>
>
>
> To: TOWERTALK@contesting.com
> Subject: Re: [TowerTalk] STACKED 40 METER BEAMS MATCH
> From: Cqtestk4xs@aol.com
> Date: Mon, 22 Nov 2010 08:35:32 EST
> List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
>
> In a message dated 11/22/2010 3:59:10 AM Greenwich Standard Time,
> jim.thom@telus.net writes:
>
> After hundreds of recent tests, the BOP mode is a dud for the most part.
> Even when listening to these
> daytime 40m nets, BIP is louder than BOP
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> My results with BOP have been quite different. On all bands from 10-40 I
> incorporated BIP/BOP/TOP/BOT and found the BOP quite useful. Perhaps it
> was because my stacks were quite high. ie. 200 for 40, 200 for 20, 140
> for
> 15 and 165 for 10. With the exception of the 40 stack, all were 4 or 6
> high
> stacks...maybe that was the reason.
>
> Bill KH7XS/K4XS
>
>
> _______________________________________________
>
>
>
> _______________________________________________
> 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
|