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Wildrat
Senior Member Username: Wildrat
Post Number: 1224 Registered: 12-2003
| Posted on Friday, February 23, 2007 - 8:19 pm: |
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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: |
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Patrick, Here is one that can be found on the web; gamma match tech291 cef291 kc8zpj |
Wildrat
Senior Member Username: Wildrat
Post Number: 1228 Registered: 12-2003
| Posted on Saturday, February 24, 2007 - 3:24 pm: |
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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: |
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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 |
Wildrat
Senior Member Username: Wildrat
Post Number: 1235 Registered: 12-2003
| Posted on Monday, February 26, 2007 - 1:47 pm: |
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Henry what is your web site? It's not in your profile. WILDRAT MARK 27.285MHZ CEF674 CVC029
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