[Antennas] Using RG174 in mobile setup ??

Wed, 28 Jan 2004 23:31:09 -0500

Are you running more than 1 watt?  I wouldn't worry if you do.  Chances
are the loss is less than the antenna gain so you will still be in a
positive gain position.  Working mostly repeaters, don't worry if there
is a bit of a loss.  It won't likely be noticed.

Running lots of power? 10 + watts?  The repeaters won't know what coax
you have!

Working EME?  Let me know how you do. ;)

Good luck

Buck

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of Demetre 
> Koumanakos
> Sent: Tuesday, January 27, 2004 8:03 AM
> To: [email protected]
> Subject: [Antennas] Using RG174 in mobile setup ??
> 
> 
> 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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