Happy I am with the W1's and W2's or anyone who chooses a higher FB and
radiates less at us 8's ! Hi !
Larry K8PUJ
-----Original Message-----
From: n4kg@juno.com <n4kg@juno.com>
To: TOWERTALK@contesting.com <TOWERTALK@contesting.com>; aunwin@fgi.net
<aunwin@fgi.net>
To: <towertalk@contesting.com>
Date: Saturday, January 20, 2001 11:52 AM
Subject: Re: [TowerTalk] Ideal Antenna rejection characteristics
>F/B ratio is largely a matter of personal preference.
>Contesters in the North East USA like high F/B to
>reduce interference from the rest of the country
>while they cream us into Europe.
>
>Personally, from SE USA, I prefer a low F/B (10 dB)
>so that I can hear/work multipliers off the back of the antenna.
>This is especially useful for hunt and call type of operating.
>
>When I changed from a 2L Quad on one of my towers to
>a TH7 (which is normally parked on Africa), I found that I
>could no longer hear / work stations in the Pacific as I
>did with the Quad.
>
>On the WARC bands I use only dipoles and Long Wire
>antennas with ZERO F/B. This is only a problem when
>there is simultaneous Short and Long Path propagation
>causing a lot of echo that can make copy difficult. I have
>worked over 310 countries on each of the WARC bands
>with these simple antennas.
>
>de Tom N4KG
>
>On Mon, 15 Jan 2001 Arthur Unwin <aunwin@fgi.net> writes:
>> A review of presently offered H.F. Yagis show
>> in general >20 db for F/B or F/R ACROSS a band
>> One antenna manuf points to a a 38 db MAX which
>> one may assume means a steep fall off either side.
>> The Antenna Handbook seems to strive for even HIGHER
>> rejection ACROSS band which would appear that there
>> is some desirability for a HIGHER level of rear rejection,
>> but for whome and what level would satisfy those needs?
>> Do DX's have different needs than the normal
>> ham ? Is it a technical plateau preventing increases in
>> this area, or is it that further increases in this area would
>> be perceieved as a negative by some users?
>> Art Unwin
>> KB9MZ
>> aunwin@fgi.net
>>
>>
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>
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