Sirio CB/AM/FM/CELL(900) Fuba Style Antenna - ain't no CB antenna

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

okay

cobra US cb radio manual I have indicates

ch1 is 26.965Mhz ~ CH40 is 27.405Mhz

Antenna Spec indicate :
(as per web site)Frequency range:
 CB 27 MHz band: tunable from 26.7 to 27.7 MHz by rotation of tuning cap

its right on the ball for CB radio

As for the Cell phone section, well I was not buying it for its GSM900 phone
capabilities anyways, only CB/FM capabilities so I dont care about the cell
side of things.



ATS - Patrick Bureau - txrocco@sbcglobal.net


=>-----Original Message-----
=>From: scirocco-l-admin@scirocco.org
=>[mailto:scirocco-l-admin@scirocco.org]On Behalf Of Marc Scirocco Québec
=>Sent: Wednesday, January 29, 2003 5:55 AM
=>To: scirocco-l@scirocco.org
=>Subject: RE: Sirio CB/AM/FM/CELL(900) Fuba Style Antenna - ain't no CB
=>antenna
=>
=>
=>In no way can this antenna be used for CBs (27MHz). If you are
=>still using a
=>CB, buy a CB specific antenna.
=>
=>Upon reading the specs, it is to be used for AM/FM band, and European GSM
=>band (cellular phone). It can be used as an external cellular
=>phone antenna
=>ONLY if you have the older style GSM phone, running into the 900 MHZ
=>(824-960 MHz roughly if you look at VSWR charts), or older style
=>analog cell
=>phones, which are being phased out fast in North-America. It
=>could work with
=>the newer North-American GSM phones (1900MHz), but performance
=>would not be
=>that great (1.8:1 VSWR).
=>
=>At 2.0:1 VSWR, I always scrap antennas...
=>
=>If you plan on using this antenna, buy ready made cables and
=>connectors for
=>the cellular phone. Do not try to make your own. Especially if it is not
=>part of your day job. At 900MHz, and even more, 1800MHz it is fairly
=>critical to have perfect connectors/coaxial cables, or your
=>signal will not
=>even reach the antenna. No you can not just hack a regular Fuba,
=>and splice
=>it to connect your cell phone, or any other kind of radio.
=>
=>I don't know about CBs, but newer RF Power Amplifiers design will reduce
=>power upon seeing high VSWR.
=>
=>Cheers.
=>
=>Marc
=>'83 Scirocco
=>'88 Scirocco Slegato
=>
=>-----Message d'origine-----
=>De : scirocco-l-admin@scirocco.org
=>[mailto:scirocco-l-admin@scirocco.org]De la part de Julie Macfarlane
=>Envoyé : 28 janvier, 2003 22:49
=>À : txrocco@sbcglobal.net; vwscir88@hotmail.com; scirocco-l@scirocco.org
=>Objet : 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?
=>> >
=>>
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