At the bottom of this page the ** footnote
1. http://www.davisrf.com/ham1/coax.htm

"note that Bury-Flex has a 20+ year abrasive resistant jacket of PE"


--

Charlie


"Dave Holford" wrote in message
...


Charlie wrote:

Wes Stewart said:
I find it curious that Andrew cable is seen so often at these events
and yet I've -never- even seen a piece of Davis cable, dispite the
claims that miles of it are in commercial use.

It might be that the BuryFlex is still in use and has not been removed
from
service as the Heliax you cite has been. After all Davis BuryFlex 9914
does
have a warranted - 20 year service life -

Is there any other coax with such a warranty?
---

Charlie

I don't seem to be able to find any mention of a warranty on their site -
can
you point it out for me?

Dave

"Ross Biggar" wrote in message
...
I am putting up a second tower , but it will be about 200feet from the
shack and about 70feet high.
What coax is recommended to reduce loss to a minimum,and to feed a
multiband beam with a 2kw amplifier.
Hard line excepted due to cost.
Regards
Ross
ZL1WN

I needed conventional low loss coax on the job a few years ago. Boss was
paying for it, so I was not pinching pennies. Best I could find was the
Times LMR400. As I recall, the center conductor is #9; so, it may not fit
some brands of N connectors. Unlike the 9913, this will not soak up water.
The loss at 50 MHz is 0.9 db, vs 1.6 db for 213 (100 feet). I know you want
20 meters, but 50 MHz is the lowest frequency I have any numbers for.

Tam/WB2TT

On Sat, 10 Dec 2005 20:42:18 -0500, "Tam/WB2TT"
wrote:


"Ross Biggar" wrote in message
...
I am putting up a second tower , but it will be about 200feet from the
shack and about 70feet high.
What coax is recommended to reduce loss to a minimum,and to feed a
multiband beam with a 2kw amplifier.
Hard line excepted due to cost.
Regards
Ross
ZL1WN

I needed conventional low loss coax on the job a few years ago. Boss was
paying for it, so I was not pinching pennies. Best I could find was the
Times LMR400. As I recall, the center conductor is #9; so, it may not fit
some brands of N connectors. Unlike the 9913, this will not soak up water.
The loss at 50 MHz is 0.9 db, vs 1.6 db for 213 (100 feet). I know you want
20 meters, but 50 MHz is the lowest frequency I have any numbers for.


LMR400: 300' at 14.2MHz with VSWR=1.5, loss~=1.5dB



Tam/WB2TT

--

Owen Duffy wrote:
LMR400: 300' at 14.2MHz with VSWR=1.5, loss~=1.5dB

Open-wire line: 300' at 14.2MHz with VSWR=1.5, loss~=0.225dB
Costs about 16 cents/ft if one rolls one's own.
--
73, Cecil http://www.qsl.net/w5dxp

On Sun, 11 Dec 2005 14:56:13 GMT, Cecil Moore wrote:

Owen Duffy wrote:
LMR400: 300' at 14.2MHz with VSWR=1.5, loss~=1.5dB

Open-wire line: 300' at 14.2MHz with VSWR=1.5, loss~=0.225dB
Costs about 16 cents/ft if one rolls one's own.

.... or unrolls it as the case may be!
--

Howdy:
I was wondering if, for a long run, instead of running coax for vhf or
uhf, if you could
have your radio up by the antenna, then run some large, but cheep wire to
the head unit
on say a ic-208? Would there be too much loss in D.C., or is there any other
problems
that I don't know about that would make this a really stupid idea, such as
some kind
of timing delay problem?

--

SeeYaa Harbin Osteen KG6URO

!sdohtem noitpyrcne devorppa-tnemnrevog troppus I

-

Harbin Osteen wrote:
Howdy:
I was wondering if, for a long run, instead of running coax for vhf or
uhf, if you could
have your radio up by the antenna, then run some large, but cheep wire to
the head unit
on say a ic-208? Would there be too much loss in D.C., or is there any other
problems
that I don't know about that would make this a really stupid idea, such as
some kind
of timing delay problem?

Locating an amplifier at the antenna is a fairly common
practice both for transmitting and/or receiving.
--
73, Cecil http://www.qsl.net/w5dxp

Remoting radios is nothing new and quite do-able. Signal line loss
problems depend on the design of the remoting. ie if line drivers are
used, not a problem. If high Z TTL lines then you might have a problem.
Power supply will be a problem. It may be smart to also remote a large
battery for current peaks. Easy to work out...

You may wish to address other issues though like lightning strikes and
weather ingress..

I use to remote a linear amp and preamp with a remote NiCd pack of D
cells. Worked well. RFO was about 70W on 144MHz.

Open wire feeder may also be an option to you.. The line loss would be
lower. You could also make some out of small dia copper pipe and spacers
you size/drill yourself.

Cheers Bob VK2YQA

Harbin Osteen wrote:
Howdy:
I was wondering if, for a long run, instead of running coax for vhf or
uhf, if you could