[SixClub] Thanks
Eric
esuitter at nctv.com
Mon Feb 1 23:46:26 EST 2010
Chris Boone wrote:
> A 108 inch whip is a 1/2wave on 6...resonant but not 50ohms.....you either
> need a matching network to match to the 50 ohm coax or cut the whip to 54in
> and you're better off.
>
> and the cophased hype of the 70 CB antennas was another thing.....you never
> really got a decent pattern as to do so, the elements needed to be 1/4 or
> 1/2 wave spaced..on 27MHz, that is 9 or 18 feet! The average vehicle is not
> that wide....the "cophased" whips probably had a terrible pattern...never
> what it should be (figure 8 off the front and back)
>
> Chris
> WB5ITT
>
>
>> -----Original Message-----
>> From: sixclub-bounces at mailman.qth.net [mailto:sixclub-
>> bounces at mailman.qth.net] On Behalf Of Howard Bingham
>> Sent: Monday, February 01, 2010 7:58 PM
>> To: sixclub at mailman.qth.net
>> Subject: Re: [SixClub] Thanks
>>
>> If there are any OLD CB supply stores in your area, try & locate
>> "Francis" fiberglass CB whip antennas.. I have used one on 6m FM with
>> reduced power (As they were only designed to handle the 5W output of
>> CB's.. [ I had two in the 1970's that were phased & mounted as paired
>> antennas on my Ford Torino GT hardtop,, they are orange in color,
>> which matched closely the "Burnt Orange" color of the car].)..
>>
>> IIRC the Francis antennas are 108" which resonate on 6m..
>>
>> Howard Bingham
>>
>
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>
On the 27 mHz CB band the co-phased antennas were designed especially
for semi trucks to mount on the mirrors 9ft apart and give a great
pattern front and back for talking to the road ahead and behind.
Eric N7XCF
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