Sirio CB/AM/FM/CELL(900) Fuba Style Antenna

[txrocco@sbcglobal.net (ATS - Patrick Bureau)]

Julie, you did get thinking about something you said

"Either that or extra wire is added to balance the load at either the base
or in the middle of the antenna"

well I did a little exercise in math...as per specs on the web site;

Antenna lengh = 450mm (1.476378  Feet)
cable that emerges from antenna = 215mm (0.705381  Feet)
Additional Cable = 5M = 5000mm (16.404199  Feet)

If you add it all up, 5665mm = 18.585958 Feet,  which it's 2.065958 Feet
(629,704mm) taller than Optimum.
(you quoted 16.52 ft or 5035.296  Millimeters)

Now the question is, is taller than 16FT a bad thing? I mean I have had 72"
whips with 10ft cable, which is ~16ft, but after SWR adjustements I would
like to know if there would be that much of a loss.

The other thing is since it PL-259 cable and connectors (standard CB radio)
I could just simply trim the extra 2.1 FT and splice in a new connector then
I would be in accordance to your stated rules of telecommunications.

ATS - Patrick Bureau - txrocco@sbcglobal.net


=>-----Original Message-----
=>From: Julie Macfarlane [mailto:juliemac57@hotmail.com]
=>Sent: Tuesday, January 28, 2003 9:49 PM
=>To: txrocco@sbcglobal.net; vwscir88@hotmail.com; scirocco-l@scirocco.org
=>Subject: Re: Sirio CB/AM/FM/CELL(900) Fuba Style Antenna
=>
=>
=>A transmitter antenna must be wave lenght matched. Meaning that the full
=>wave frequency for a 27 Mhz radio (cb) is 16.52 feet (both sides + & - of
=>the sinusiodal waveform). Divisors of lenght are allowed but in
=>even steps
=>only. Mismatch the antenna and the forward moving wave (energy) can be
=>reflected back to the transmitter and burn out the output stage.
=>Therefore 1/2, 1/4, 1/8 wave antennas are good. Either that or
=>extra wire is
=>added to balance the load at either the base or in the middle of the
=>antenna, and to fine tune the antenna a matcher (SWR) is added in line.
=>I didn't see this antenna matching the correct frequency for a
=>CB. Maybe the
=>hand held FM jobs on 900 mhz, but not 27Mhz.
=>Sorry boys
=>
=>
=>Julie Macfarlane
=>Menlo Park Research & Development
=>Internet Application Developer
=>Amsterdam NY
=>
=>
=>
=>
=>
=>>From: Patrick Bureau <txrocco@sbcglobal.net>
=>>To: brett cooke <vwscir88@hotmail.com>, scirocco-l@scirocco.org
=>>Subject: Re: Sirio CB/AM/FM/CELL(900) Fuba Style Antenna
=>>Date: Tue, 28 Jan 2003 19:11:03 -0800 (PST)
=>>
=>>This antenna is actually a CB antenna with an Fm and
=>>GSm coiled around the shaft, it is not a power FM
=>>antenna in any way, that is what is different
=>>and no you cannot use a standard FM antenna to
=>>transmit CB radio signal, youll just end up burning up
=>>your cb radio.
=>>
=>>Patrick
=>>
=>>--- brett cooke <vwscir88@hotmail.com> wrote:
=>> > what is the difference betwwen this antenna and the
=>> > stock antenna?
=>> >
=>>
=>>_______________________________________________
=>>Scirocco-l mailing list
=>>Scirocco-l@scirocco.org
=>>http://neubayern.net/mailman/listinfo/scirocco-l
=>
=>
=>_________________________________________________________________
=>STOP MORE SPAM with the new MSN 8 and get 2 months FREE*
=>http://join.msn.com/?page=features/junkmail