> Hi Folks!
> Would you use BR400 instead of LMR400? I have noted that it seems to be
> an
> equivalent cable, but wanted to check the list for the opinions of others.
Check with the bulk suppliers. When you can purchase Times Wire LMR-600
for about 90 cents a foot (give or take) they quit offering the generic
stuff.
I'm not sure what BR400 is, but list price on LMR-400 is only 60 some cents
per foot with bulk discounts being in the low 50 cent range. I've seen 1000
foot rolls of generic LMR-400 for $295. I don't know if they'll have any
after that is gone of not and I have no idea as to the quality. I stick with
the name brand stuff just for comfort even if they all come from the same
place. Depending on supplier, crimp N connectors are just under $4.00 for
LMR-400 and between $6 and $7 US for LMR 600. Prices vary widely.
> Another question...I know it may not be ideal, but with a generous loop,
> can
> I use this type of cable around a rotator and avoid the losses from a set
> of
> connectors and the flexible jumper? My total runs are about 40-60 ft and
> below 1300 MHz. Alternatively, should I use the flexible version of
> LMR400
> instead?
I'm planning on plain old LMR-600 for my rotator loops. The pigtails are
*about* 28 feet long. At the top of the tower the pigtails form *3* turn
coils with a maximum diameter of about 20 inches laying on the flat top
plate of the 45G. Maximum rotator travel is 500 degrees or bit less than 1
1/2 turns. I've been doing this with LMR-400 for a bit over 5 years with no
problems. When I get done I plan on shooting some photos of the top showing
both the sleeve (which replaces the thrust bearing) and the rotator loops
When finished the LMR-600 will attach to the two-way power dividers for the
144 and 440 arrays and to the 6-meter beam replading the current LMR-400.
They then snake down the mast to about a foot above the top of the tower
where they will make a bend with about a 6" radius and then curve out to the
outside of the circle. The other end of the runs goes over the edge of the
top plate where they connect to the LMR-600 run down the side of the tower.
The outside of the double female connectors are grounded to the tower.
>
The coax runs are also grounded at the bottom of the tower before making the
loop into the conduit for the run to the house.
Roger Halstead (K8RI and ARRL 40 year Life Member)
N833R - World's oldest Debonair CD-2
www.rogerhalstead.com
> Thanks &73,
> Gordon, w2TTT
> 201.314.6964
>
>
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