[nrv-hams] Fwd: RE: coax loss

[Carter Craigie]

Thanks, Danny! Good stuff!!
73,
Carter

Sent from my iPhone

On Jul 9, 2013, at 8:47 AM, dwylam at verizon.net wrote:

>  I have been doing some homework on coax  for uhf- vhf. Here is some useful info I got from John Bee of Quicksilver Radio Products. For comparison I ave checked some RG8X that I have and some others and for 50' they are 1.7 - 2.5db loss.  The Bury flex sold by Quicksilver should be below 1db for 50' with pl259 connectors installed.
>     73
>    Danny
>     
>    
>  
> ----------Original Message----------
> 
> From: "Quicksilver Radio" 
> Date: Jul 8, 2013 1:51:04 PM
> Subject: RE: coax loss
> To: <dwylam at verizon.net>
>  
> Hi Danny:
> 
>  
> 
> Loss at a given frequency is simply a linear function – 50 feet will have ½ the loss of 100 feet, or .9dB in this case.  As a rule of thumb I figure .005 dB loss per connector at HF, .01 dB at VHF and .02 at UHF.  So a total of 1.1 dB in this case.  Of course, this assumes a perfect 1:1 SWR, but the difference at 1.5:1 SWR is going to be quite small.  Bottom line is that 1 dB might be just barely noticeable, and would almost never make a difference.
> 
>  
> 
> Thanks and 73,
> 
> John Bee, N1GNV
> 
> Quicksilver Radio Products
> 
> http://www.qsradio.com
> 
> See us at Hamfests from Maine to Florida
> 
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> 
> Booths 462-463-464-465-469-470-471-472
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>  
> 
> From: dwylam at verizon.net [mailto:dwylam at verizon.net] 
> Sent: Monday, July 08, 2013 1:07 PM
> To: jbee at qsradio.com
> Subject: coax loss
> 
>  
> 
> The Bury flex has a loss of 1.8db at 150mhz for a 100'length. What should I expect it to be  for a 50' length with pl259 connectors installed?
> 
>  
> 
>    Thanks
> 
>   Danny Wylam   AI4RC
> 
> 
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