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Wildrat
Senior Member
Username: Wildrat

Post Number: 1224
Registered: 12-2003


Posted on Friday, February 23, 2007 - 8:19 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Does anyone have plans for a home brew gamma match suitable for a Maco type 4 element beam?
WILDRAT
MARK
27.285MHZ
CEF674
CVC029
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Tech291
Moderator
Username: Tech291

Post Number: 470
Registered: 11-2004
Posted on Saturday, February 24, 2007 - 9:47 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Patrick,
Here is one that can be found on the web;
gamma match

tech291
cef291
kc8zpj
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Wildrat
Senior Member
Username: Wildrat

Post Number: 1228
Registered: 12-2003


Posted on Saturday, February 24, 2007 - 3:24 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Thank You Very Much !
I went to SE yesterday thinking I had seen your link but I could not find it. I guess I scanned a little to quickly.

Now for another question.
What should the working volts be approximately if say someone was applying maybe a little more power than 4 watts, or can you just use Ohms law to figure it out, or could I be lazy and let you tell me the formula?
Well that turned out to be more than one question.
I guess also that the size of the cap will have to be played around with a bit to get the SWR down to what one would desire if your not using a variable, is that correct?
WILDRAT
MARK
27.285MHZ
CEF674
CVC029
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Henry_hpsd
New member
Username: Henry_hpsd

Post Number: 2
Registered: 2-2007
Posted on Sunday, February 25, 2007 - 8:56 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Wondering what u mean by a little more power..

For your idea, any C that has the capacity as described but comes from any old surplus linear or antenna-tuner might suite u fine.

For more technical background visit:
http://www.w8ji.com/omega_and_gama_matching.htm
(he describeds 1,5kw +/- 6,5KV with the formulas)

What you could do either, is find out what C you need and use coaxcable (coax has its own C per feet as you can find on a google search.) With this solution you can bring the power up to the powercapabilities of the coaxline.

There is also a small decriprition on my homesite on gamma-match (underneath->projects to build)

73s
Henry 19SD348
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Wildrat
Senior Member
Username: Wildrat

Post Number: 1235
Registered: 12-2003


Posted on Monday, February 26, 2007 - 1:47 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Henry what is your web site? It's not in your profile.
WILDRAT
MARK
27.285MHZ
CEF674
CVC029

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