Translation: NO (Get a real CB Antenna)
- Bernd
-----Original Message-----
From: owner-dakota-truck@buffnet.net
To: dakota-truck@buffnet.net
Subject: RE: DML: secret CB antenna - does it work???
What'd he say?
Ron
-----Original Message-----
From: owner-dakota-truck@buffnet.net
To: 'dakota-truck@buffnet.net'
Subject: Re: DML: secret CB antenna - does it work???
Now for a little antenna theory...
Your AM/FM antenna is no where near resonance at 27 MHz. To make it
"appear" to resonate at that frequency, the "secret CB antenna" idea places
capacitance, resistance and inductance in-line so that your CB radio sees a
50 ohm load with low VSWR. You can adjust the "load" using a
potentiometer -- thus "tuning" your non-resonant AM/FM antenna for good VSWR
on 27 MHz.
This "secret CB antenna" works more-or-less like a 50 ohm dummy load (a big
50 ohm resistor). It presents a good 50 ohm load with low VSWR to your
radio. By no means does it make your AM/FM antenna an efficient RF
radiator.
If you want to be heard, you need an efficient RF radiator. Get a *real*
antenna that's suited for your intended purpose. A 1/4 wave whip works
best. Let's see, the middle of the CB band is 27.185 MHz (ch 19). 1/4 wave
on 27.185 MHz is 8.6 ft. (234 / 27.185 = 8.6).
Good luck,
-Mitch
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