[TowerTalk] STACKED 40 METER BEAMS MATCH

[K1TTT]

The simplest version is a single 1/4 wave section that is added in when 3 or
more yagis are paralleled... been using that here for years, add one jumper
to an rcs8-v relay box and use 1n4001 diodes to make up stacks and you can
make up all sorts of combinations with 4 ports to play with on the tower.


David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
web: http://www.k1ttt.net
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
 

> -----Original Message-----
> From: DF3KV [mailto:df3kv at t-online.de]
> Sent: Sunday, November 21, 2010 18:39
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] STACKED 40 METER BEAMS MATCH
> 
> I don´t agree.
> The stack match is a more complicated and expensive way to do the
> matching.
> The easiest, less expensivest and imho best methode is series matching.
> 
> http://www.seed-solutions.com/gregordy/Software/SMC.htm
> 
> I use hard wired stacks on 10, 15 and 20m and switched antenna selection
> on
> the low bands (combinations of 3) by switching transforming lines in and
> out
> with the antennas,  all with series matched coax lines.
> 
> 73
> Peter, DJ7WW
> 
> -----Original Message-----
> From: towertalk-bounces at contesting.com
> [mailto:towertalk-bounces at contesting.com] On Behalf Of n8de at thepoint.net
> 
> 
> You can compensate in many different ways, or course, but the easiest
> is to use a stack match .. or build your own.
> 
> Another way is to use coax that DOES NOT match the impedance of your
> antenna so as to make the impedance at the 'junction' the parallel
> value of two 100 ohm lines ... but that's the WORST way to do it.
> 
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