Yo! TONY:
Tuesday October 08 1996 23:43, TONY SZABLOWSKI wrote to BILL CHEEK:
 TS> Right now I've got my discone scanning antenna about 3' below and
 TS> 10-15' away from my GMRS antenna.  Would this my proximity be damaging
 TS> to the receive\transmit capabilities of the GMRS antenna?
Well, GMRS is on 450 MHz, the wavelength of which is .67 meters or barely 
over a couple of feet.  The 10-15 ft distance means you're rather safe.
 ->> Antennas within  1 wavelength of each other WILL affect each other.
 ->> Between 1 and 3 wavelengths, the effects are less.....perhaps
 ->> tolerable by the scannist, and beyond 3 wavelengths, there is no
 ->> measurable effect.
 TS> I'm tired off my but Bill, so forgive me, but what do you mean by
 TS> wavelengths?  The actual signal wavelength either coming in or going out
 TS> of the antenna?
Wavelength with respect to the antenna under analysis.  The GMRS antenna at 
450 MHz is not likely to be affected by the discone.  However, since the 
discone can receive down to 25 MHz, the wavelength of which is 12 meters or 
about 40-ft, then the GMRS antenna can affect the discone at the lower end of 
its bandwidth.  The vertical separation coupled with the extreme frequency 
separation makes any effects very unlikely to be noticed.
Bill Cheek | Internet: bcheek@cts.com | Compu$erve: 74107,1176
Windows 95 Juggernaut Team | Microsoft MVP
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