Hi Kent,
All coax, like all conductors, have Ohmic (resistive) loss, regardless of
the frequency of operation. It's this loss that takes over when frequencies
used fall much below 30 MHz.
You'll note Bury Flex, like any other .500" or smaller 50 Ohm cable, has
attenuation that remains about constant below 10 MHz, and it's about 0.7
dB/100' best case. 350' would be 2.45dB. That improves return loss by
2.45dB, and VSWR measurements will be 2.45dB better than "actual." That's
quite an improvement!
-WB2WIK/6
"If everything seems under control, you're just not going fast enough." -
Mario Andretti
> -----Original Message-----
> From: Kent Miller [SMTP:K4MK@triad.rr.com]
> Sent: Wednesday, October 02, 2002 9:06 AM
> To: stevek@jwr.com; towertalk@contesting.com
> Subject: [Towertalk] 40 meter yagi matching
>
> I should have said it is 350 ft. of Bury-Flex, not just plain 52 ohm
> coax --- the loss very well may affect the swr readings some, but at 7.0
> Mhz., I would consider the loss negligible with this coax.
>
> Kent - K4MK
>
>
>
> _______________________________________________
> AN Wireless Self Supporting Towers at discounted prices,
> See http://www.mscomputer.com
>
> Wireless Weather Stations now $349.95. Call Toll Free,
> 888-333-9041 for additional information.
> _______________________________________________
> Towertalk mailing list
> Towertalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
|