[TowerTalk] Feedline - Question - Idea
grants2 at pacbell.net
Wed May 9 16:31:11 EDT 2018
I have no experience with triplexers but it sounds like a bad idea to
put 4.5KW (3 bands QRO) through an N connector. I agree, use DIN
7/8" RFS hardline (LDF5-50 knockoff) is $2.50/ft so what is that in
comparison to the cost/db of tower + yagis + rotators and then add
triplexers, BP filters? Big hardline feedline yields cheap db's in my
view, lasts forever, and shields better. My goal was <1db amp to
feedpoint loss. LDF5/AVA5 for 20/15/10 and LDF4 Heliax for 80/40. Some
big guns use 1 1/4 or larger to their towers.
The spools of larger sizes often go cheaper than 7/8 from the surplus
dealers. Still cheap even if a right size DIN connector costs $100.
On 5/9/2018 7:43 AM, Mike DeChristopher wrote:
> I have a similar problem at my new QTH. I'm considering a few products
> from Low Band Systems. They offer a variety of multiplexers depending
> on what bands you'd like, but I have not yet personally used one or
> even seen one in person. DX Engineering has some of their stuff, the
> rest is at http://lowbandsystems.com/collection/multiplexers.
> Maybe someone else in TowerTalkia has a review they'd share. I'm
> especially curious how it works when you're drilling 1.5kW x3 (in the
> case of a triplexer) down a single feedline.
> Mike N1TA
> On Wed, May 9, 2018 at 10:02 AM, Gary <gary_mayfield at hotmail.com> wrote:
>> I am looking at a possible location where the antennas will be 500 feet - maybe a little more from the operating location. Is anyone aware of a 5 band (80-10 meters) multiplexer that would allow simultaneous operation of 5 radios via one coax to a tribander + 40 and 80 meter dipoles located 500 feet away?
>> Thanks and 73,
>> Gary "Joe" kk0sd
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