[TowerTalk] Bury-Flex Tm vs LMR-400 vs UltrFlex
DavisRFinc@aol.com
DavisRFinc@aol.com
Mon, 10 May 1999 23:30:20 EDT
In a message dated 5/10/99 11:16:14 PM Eastern Daylight Time, DavisRFinc
writes:
<< Hi Ian, Glad to help. I'll respond in specific to you on your email but
for the benefit of anyone else in the group: Most situations I have seen,
the 23 cents extra (at our pricing) for LMR 400 Ultra Flex is not worth it.
the rated bend radius on UFlex is the same: 1" (again, inflate about double
to be careful), the loss difference is negligibe until you get up at 1 gig or
more, then it's a matter of length and power needed.
The "Davis RF Flexometer" test says: take 2 ft of "Bury-Flex" Reg Tm of
Davis RF, 2 ft of LMR 400 and 2 ft of LMR 400UF, grasp all 3 in one hand at
their midpoint, take your other hand and grab one at a time at the end, flex
it back and forth a good 8" or more. You will probably agree that LMR 400 UF
is about 25-30% more flexible (real scientific here!!), than Bury-Flex which
is about that more flexible than LMR 400.
Bury Flex is thebest truly buriable and it will work around rotators, give
it about 30% more loop than the UFlex (LMR 400 is buriable, UFlex is not, in
my opinion). Save about 19 cents per foot by using Bury Flex vs UFlex.
Save about 4 cents per foot vs. B Flex by using LMR 400 in the station and
out to tower top but use UFlex or Bury-Flex around the rotator (I'd use 400
UFlex). At HF-UHF you'll never "feel" the iota of insertion loss of the
conneciion of the two. List on LMR 400 is .64/ft, we sell it to hams same
price as commercial: .53;
400 UlFlex is .98 list, yours: .76 and BFlex is yours: about .57 depending
on length. LMR's any length. We discount the LMR connectors too but as I
mentioined in last, use std UHF's on 400, voids cable warranty but haven't
seen an issue yet on that.
If you want to check out these flexibilities, stop by Press's WireMan booth
at Dayton, or RadioWare/Radio Bookstore; or Radio Works; Memphis Amateur, etc.
------------------------------------------------------------------------------
---------------------
DAVIS RF Co., commercial wire and cable, custom cable design. Discounts to
hams. Heliax, LMR, RFS, Belden, Poly Phaser Lightning Protection Devices.
Various aerial wiring; transmission lines, insulators, baluns, RF connectors
and Dacron rope. www.davisRF.com . 1-800-328-4773, (For all RF hardline
related items, please ask for Steve Davis) Thank you!
"The Triad": Davis RF Co.; Orion Wire Corp.; and The Wire Man, Inc.:
Variegated expertise; resources and buying power yielding numerous quality
products at highly competitive pricing.
In a message dated 5/10/99 4:21:44 PM Eastern Daylight Time,
glcazzola@iol.it writes:
<< Steve, many thanks for all the infos that you have given me.
I am changing home, and in new home I want to use RF cables with better
power handling/attenuation (I have 1kw out cw from my Henry 2kd), really
with a short lenght of cable
(three antenna with about 15/20meter cables each). But I want change all
station cables with an RF cable well screened from computers, electronic
home device etc.
Could it be the right cable the LMR400ULtraflex inside and outside? I am
thinking about it becouse a friend on the reflector has said me that LMR400
is very good but not flexible enought to be used around the beam rotor and a
little difficult to be used for station cables.
What do you think about LMR400Ultraflex? Is it rugged enought? What is his
price? Can you forward here in Italy?
Many thanks Steve. 73.
Ian Ik4EWX
>>
In a message dated 5/10/99 4:24:50 PM Eastern Daylight Time,
glcazzola@iol.it writes:
<
> Steve, many thanks for all the infos that you have given me.
> I am changing home, and in new home I want to use RF cables with better
> power handling/attenuation (I have 1kw out cw from my Henry 2kd), really
> with a short lenght of cable
> (three antenna with about 15/20meter cables each). But I want change all
> station cables with an RF cable well screened from computers, electronic
> home device etc.
> Could it be the right cable the LMR400ULtraflex inside and outside? I am
> thinking about it becouse a friend on the reflector has said me that
LMR400
> is very good but not flexible enought to be used around the beam rotor and
a
> little difficult to be used for station cables.
> What do you think about LMR400Ultraflex? Is it rugged enought? What is his
> price? Can you forward here in Italy?
> Many thanks Steve. 73.
> Ian Ik4EWX
>
>
> ----- Original Message -----
> From: <DavisRFinc@aol.com>
> To: <glcazzola@iol.it>; <towertalk@contesting.com>
> >
> >
> > Hi Ian,
> > You can use a std. UHF Pl259 for LMR 400 and for 240 (you mention 200,
see
> > further on). For the 240, use a UG176 adaptor, same as for 8X. Note:
if
> you
> > buy Times LMR and install connectors, theirs or otherwise, yourself or
via
> > other than a licensed installer, the cable warranty is void. We've
never
> > experienced a cable problem anyway, and many hams do their own
connetors.
> N
> > connect's for LMR 400 must be the 9913 type, not RG8/RG213, etc. type.
> > If you mean LMR 200 (vs. 240) I can look into that but if I remember
> > correctly you can still use the UHF, just need to shim for the OD being
> .195"
> > vs. .242" on the 240. Inner conductor is .044 vs. .056 on the 240.
> > Ref. flex of 400 for connection to amp, tuner, routing it, etc. you
> > should have no problem at all. 400 is about as flex as a stiff RG8,
solid
> > ctr conduc, and the rated bend radius for 400 is 1"; however, we've
found
> it
> > best to play it conservative with LMR bend ratings, say 2" vs. 1".
> > We have the lowest pricing on LMR, their connectors and our custom
made
> > hard line connectors (appreciably lower cost than Times connects), that
> we're
> > aware of. Same commercial wholesale price to hams. Any other
questions,
> > feel free to contact me. 73, Steve Davis, K1PEK DAVIS RF Co.
> >>
>>
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