for what bands dave?
for HF RG213 would do you nicely
but if your doing VHF/UHF you really need a good coax like 9913F or
LMR400 they have a buryflex just dont recall the model number
keep in mind at VHF freqs 100 or more you really start to lose a lot of
RF with cheap coax
RG213 at 400mhz @100ft is more than 9db of loss which is a lot
good luck

KC1DI wrote:

What type of coax are you using for direct burial ? I need to burry
about 100 feet to get to my new antenna and was wondering if it is
really worth the money to go with bury-flex.
your thought are appreciated.
73 Dave

Dennis Kaylor wrote:
RG213 at 400mhz @100ft is more than 9db of loss which is a lot

With 200 ft. of RG-58 on 400 Mhz, one doesn't even
need an antenna. :-)
--
73, Cecil http://www.qsl.net/w5dxp


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"Cecil Moore" wrote in message
...
Dennis Kaylor wrote:
RG213 at 400mhz @100ft is more than 9db of loss which is a lot

With 200 ft. of RG-58 on 400 Mhz, one doesn't even
need an antenna. :-)
--
73, Cecil http://www.qsl.net/w5dxp

Or a tuner.

Dale W4OP

Or an SWR meter....:/ With that much loss, even a dead short
would probably look acceptable...
As far as 213 coax, it *is * a direct bury coax. You can bury it
no problem. Rg-6 is a 75 ohm coax used for TV/Cable.
It will work, but it would be better to use a 50 ohm line, being
you have a 50 ohm rig...Will cause you appx a 1.4 to 1 mismatch,
with is no big deal really...It will reduce your "usable" bandwidth
though...I use 213 on VHF for short runs...Some loss, but not
enough to kill you...None of my coax runs are over 50 feet..MK

I have about 175 ft of Davis "Direct Bury" Low Loss 9914F total at my
station. It is superb 50 ohm low loss coax that requires no "garden hose"
or "pvc" tubing. Just slit the soil or trench it and lay the coax in. At HF
frequencies it is virtually lossless. It is within .1db in loss as compared
to 9913 plus it is very flexible and can be used on rotators directly where
9913 cannot. And moreover 9913 cannot be buried directly.

IMHO it is the best coax to use.

--

Charlie
Ham Radio - AD5TH
www.ad5th.com





wrote in message
oups.com...
Or an SWR meter....:/ With that much loss, even a dead short
would probably look acceptable...
As far as 213 coax, it *is * a direct bury coax. You can bury it
no problem. Rg-6 is a 75 ohm coax used for TV/Cable.
It will work, but it would be better to use a 50 ohm line, being
you have a 50 ohm rig...Will cause you appx a 1.4 to 1 mismatch,
with is no big deal really...It will reduce your "usable" bandwidth
though...I use 213 on VHF for short runs...Some loss, but not
enough to kill you...None of my coax runs are over 50 feet..MK

On Thu, 14 Apr 2005 10:59:19 GMT, Dennis Kaylor
wrote:

for what bands dave?
for HF RG213 would do you nicely
but if your doing VHF/UHF you really need a good coax like 9913F or
LMR400 they have a buryflex just dont recall the model number
keep in mind at VHF freqs 100 or more you really start to lose a lot of
RF with cheap coax
RG213 at 400mhz @100ft is more than 9db of loss which is a lot
good luck

Better check your numbers again. RG213 is more like 4.7 dB/100'
@400MHz