[50mhz] Modifying Cushcraft A50-5S

[Carl]

There is only about .1dB to be gained on that boom length. However the F/R 
can be much improved from 18 to 28dB if noise is an issue. That boom length 
is better for 4 elements at 10 dBi gain and 26 dB F/R if you dont mind a DE 
impedance of around 17 Ohms which can easily be stepped up with a T Match.

In order to adapt any new design that original gamma match has to go. I use 
the all metal T Match in all my designs.

Unfortunately I havent added these designs to a PC file yet but can snail 
mail it. This was designed about 12-13 years ago using YO, built and 
verified. However that HD is long since crashed and I cant find the floppy 
backups.

Plus I still cant get YO 6.5 functioning on a XP PC with the DOS simulators 
Ive tried.

Anybody have YO 7.5 they are willing to share?

Carl
KM1H



----- Original Message ----- 
From: "John Kemker" <john at kemker.org>
To: "50mhzer's" <50mhz at qth.net>
Sent: Friday, June 26, 2009 12:56 AM
Subject: [50mhz] Modifying Cushcraft A50-5S


>I was wondering if anyone had come up with an improved layout/spacing
> using the A50-5S as a basis?  I have an A50-5S, but feel that there
> should be some way to improve the performance with a few
> modifications/changes.  Anyone have any suggestions?  I can lengthen the
> boom, change the lengths and spacing of the elements, etc.  I'm not
> going to be able to do much in the way of modifying the gamma match, or
> adding extra elements.
>
>
> -- 
> --JohnK
> 73 de W5NNH
> 10X 75371/M&M 117/SMIRK 6185/Six Club 285/TRA 2499/Norcross 228 F&AM
>
>
>
>
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