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Re: [TowerTalk] What relay do Ameritron and Array Solutions

To: "jeremy-ca" <>, <>
Subject: Re: [TowerTalk] What relay do Ameritron and Array Solutions
From: Jim Lux <>
Date: Sat, 19 May 2007 07:17:35 -0700
List-post: <>
At 08:18 PM 5/15/2007, jeremy-ca wrote:

>>The VNA might take the guesswork out of some of the measurements, but
>>doesn't tell you much about how to change the design to make it
>>"better".  And for using "non-RF" components in RF applications
>>(which is what most amateur market relay boxes are.. they are NOT
>>clever stripline designs like DowKey uses) there's an awful lot of
>>craft and art to the design, probably moreso than straightforward RF
>>circuit design.  (Unless someone's been out building HFSS models for relays).
>The VNA is simply a tool. As with any tool it requires that the user have an
>understanding of its abilities as well as his own.
>The DowKey is not a stripline design, it is a coaxial line section; 
>big difference.

Not the one I have sitting on my desk.  It's a SP6T and it's got six 
little striplines that are moved by solenoids.  I also have a 
microwave transfer switch, and it's got 4 little striplines that move

I suspect there's lots of different designs they use. 


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