Mike, I have a
site where the 224 on the VHF repeater is now about 3 feet from a
T mobile antenna. Today, the cell electronics, including RF is up
on the tower. The boxes are fed with 48 vdc and fiber. If I run 40
watts of RF on the MTR-2000 I have over 40 dB of desensing. I am
running 1 watt right now which brings me down to about 10 dB of
desensing. In a month of two I will have a tower climber look
around for me. I am planning on installing a huster G6 as a
transmit anteena, on the other side to the water tower ( the
antenna will be clear of the water tower "dome". There will be no
cell antennas close to it.
I have a telewave 6 cavity duplexer, that into a dummy load has
no desense. None. I am convinced that my 147 MHz RF is into the
broad band amps, and they are doing a wonderful job of spitting it
back. I cann't yell at them ,they pay rent!
I'll let you know what I find out in a few months.
Tom K8TB
The only thing
that worries me are the 5G panels at the
top of the water tower.? I¡¯m concerned that broadband noise
from them is causing the desense,
but frankly I don¡¯t know how to test for that.? Everything I
learned about repeaters I learned here and I¡¯m a lot
stronger in the shop then I am on-site.? Clearly
the club doesn¡¯t want to spend a bunch of money on feedline
and climbers only to find out that it didn¡¯t
cure the problem.?
Standing by
for advice; flameproof underwear has been donned.
Mike
WM4B
?
