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

[marc_scirocco@sympatico.ca (Marc Scirocco Québec)]

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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>Scirocco-l mailing list
>Scirocco-l@scirocco.org
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