On 13 Aug 96 08:52am, Scott Hoffman wrote to All:
 SH> I just bought a new antenna (which is meant for FM radio) but I use
 SH> it for my scanner anyway and it seems to work pretty good. Although I
 SH> am concerned about impedance mismatches and the fact that I might not
 SH> be working my antenna to its full potential because if this..
 SH> My problem is... that the antanna comes with a 'built in' set of
 SH> twin-lead cables (which is labled 300Ohms).. My problem is how
 SH> do I Interface 300 Ohms to 50Ohms which most scanners use?  I know
 SH> that their are plenty of  300 --> 75Ohm transformers which are
 SH> used for TV's,  but I have NEVER ever seen a 300 --> 50Ohm transformer,
 SH> does on even exist?  where can I get one?    So what I'm using now
 SH> is just a 300-->75 transofrmer and I'm inputting the 75Ohm into
 SH> my scanner..  Does feeding the 75 Ohm input into the 50Ohm scanner
 SH> input really make "that much" of a difference or is the difference
 SH> pretty much minimul almost non-existant?   One last question..
 SH> Are antennas really 300 Ohms, I'm not sure I get this concept.. Couldnt
 SH> I just splice my low-loss RG-8 50Ohm cable right onto the antenna
 SH> without even using a 300-->75/50Ohm transofrmer?
 I will risk something here, and assume that you mean 50 ohms instead of 500
 ohms, as that's what scanners really want.
 Anyway, using a 300-75 ohm converter will work just fine, as that small
 mismatch won't make anywhere the difference the 300 to 50 ohm mismatch
 will.
 Go for it!
Bill Funk:  Internet:  skypilot@starlink.com
	    ASCIi User Group: http://www.starlink.com:80/~ascii
...  -C:\> Bad command or file name! Go stand in the corner.
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