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#1
November 22nd 06, 12:13 AM
posted to rec.radio.amateur.antenna
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Questions on broadband antenna design (e.g. T2FD)
C. J. Clegg wrote:
It cannot use any sort of antenna tuner and must be fed with a single coax of 50 or 75 ohms. Why not an autotuner at the antenna feedpoint? -- 73, Cecil http://www.w5dxp.com |
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#2
November 22nd 06, 12:49 AM
posted to rec.radio.amateur.antenna
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Questions on broadband antenna design (e.g. T2FD)
On Wed, 22 Nov 2006 00:13:48 +0000, Cecil Moore wrote:
Why not an autotuner at the antenna feedpoint? Too much money. Anyway, eventually (not right away) this antenna is going to be used in an ALE network and I rather doubt that autotuners work very well in that kind of an environment. |
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#3
November 22nd 06, 01:05 AM
posted to rec.radio.amateur.antenna
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Questions on broadband antenna design (e.g. T2FD)
"C. J. Clegg" wrote in
news 
On Wed, 22 Nov 2006 00:13:48 +0000, Cecil Moore wrote: Why not an autotuner at the antenna feedpoint? Too much money. Anyway, eventually (not right away) this antenna is going to be used in an ALE network and I rather doubt that autotuners work very well in that kind of an environment. Anything over about 90 feet should work. 125 would be just about perfect. And no, they DON'T have bad spots....usually they stay under 2 to 1 across a fairly wide band and efficiency stays good above the knee frequency. Model it, if you want exact performance figures. -- Dave Oldridge+ ICQ 1800667 |
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