[Antennas] Using RG174 in mobile setup ??

Tue, 27 Jan 2004 09:08:40 -0700

If you are only trying to reach the local repeater, don't worry about it.
 Use the smaller coax if the installation looks better to you.  Remember,
the 250mw HT's make the trip all the time.
73 de Jerry, K�EJF

On Tue, 27 Jan 2004 08:02:38 -0500 (EST) "Demetre Koumanakos"
<[email protected]> writes:
> Hi All,
> 
> I'm about to install a new 2m mobile on my Tribute SUV, the antenna 
> 
> will be mounted on the roofrail and grounded through one of the rail 
> 
> mounting screws. I will install a quarter wave (AS chrome dome) so I 
> 
> may be able to enter underground parking facilities.
> 
> For feedline I managed to find a local dealer and purchased RG174 
> (very thin 50 ohm coaxial) so I can get the feed through the back 
> door without too much presure being applied to either the feed or 
> the 
> elastic insulation of the door.
> 
> The RG174 attenuation if about double that of the RG58 or about 4 
> times that of RG8X, even though the feed run will not be more than 
> 5-
> 6 meters, attenuation may be problematic to TX-RX and EMS may effect 
> 
> the car electronics (???) due to the limited shielding of RG174.
> 
> I was thinking of using RG8X up to where the RG174 comes into the 
> car 
> and patch both via proper BNC connectors) together. The impedence 
> should be OK, both cables are 50 ohms, but considering the BNC 
> attenuation as well as the overal performance results, is it worth 
> the trouble ?? or should I just use RG174 and hopefully the 
> atteuation and EMS will not be much of a problem ?????
> 
> 73
> Demetre - SV1ENS
> 
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