[50mhz] Modifying Cushcraft A50-5S

[John Kemker]

I've had a couple of folks send me the W5WVO mods, which I much 
appreciate.  That lengthens the boom length with an easy mod and still 
uses the gamma match.

As far as building a T-Match, I don't mind, as long as there's some 
decent instructions.  I've got plenty of 75ohm cable and F connectors 
and am purchasing some new F female connectors next payday to finish a 
160m RX Loop.  Purchasing a few more for the balun for a T-Match is only 
$1 more.

DX Engineering has the 1.5" X 72" boom addition for the W5WVO design for 
under $14.  I'll be ordering that next payday, also.

Carl wrote:
> 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
>> 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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