[nrv-hams] Fwd: RE: coax loss
Karen Anderson
dreamsong001 at earthlink.net
Tue Jul 9 08:57:34 EDT 2013
John Bee's a great guy. he should be at the
roanoke hamfest first saturday in august (i
think?). quite often John (hubby, k4jka) will
give John Bee an order and pick it up at the hamfest. saves a bit on shipping.
At 08:47 AM 7/9/2013, you 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/>http://www.qsradio.com
>
>See us at Hamfests from Maine to Florida
>
>And our Huge Display at Dayton 2014
>
>Booths 462-463-464-465-469-470-471-472
>
>
>
>From:
><mailto:dwylam at verizon.net>dwylam at verizon.net [mailto:dwylam at verizon.net]
>Sent: Monday, July 08, 2013 1:07 PM
>To: <mailto:jbee at qsradio.com>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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Karen Anderson - KI4GOT
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