Wayne Dewey (WD6AHX), hot off the
tower, and Bob Gonsett (W6VR), coping with low temperatures inside the
equipment vault, discuss FARC's repeater installation. Behind them
is microwave equipment for UCSD's HPWREN high speed wireless Internet
project. Read about that exciting project at http://hpwren.ucsd.edu/.
These three photos by Ken
Dickson (WØPSM).
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Ron Patten (KG6HSQ) manicures
the repeater installation.
Daniel Spears (AJ7SK) locates
an improved 12 VDC point for powering the 2-meter receiver's GaAsFET
preamplifier. |
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The top and bottom of each FARC
antenna were rigidly clamped to the tower platforms on September
18. Soon after, there was some concern that the antennas could be
literally torn apart during a winter storm when the platforms
swayed. To solve this problem, the top clamps were loosened by
WD6AHX during the October 23 work party, and insulated (non-metallic)
"slip sleeves" were inserted between the clamps and the antenna
masts. The sleeve for the 2-meter antenna is shown here. Now,
each antenna can move freely up and down inside its sleeve. Not
even thermal expansion will bother us. Thanks Wayne! |
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Front view of FARC's repeater equipment consisting almost
entirely of used gear. The left rack holds the cavity filters, the right
rack holds the repeaters.
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Rear view of FARC's repeater equipment. Each repeater has
its own power supply, so one failure will not take the whole system
down. AC power is provided by SDG&E, but the building has an emergency
power generator and FARC is wired into the circuit.
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FARC's two antennas are depicted in this photo. The antennas
are obviously well elevated, but their heights above sea level are
comparable to the heights used earlier at the ATC site. The ATC site is at
the very top of the hill. The CDF site is a bit lower, but the tall CDF
tower makes up the difference.
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Flashback to September 18: The
first snow of the season has just fallen on San Gorgonio Mountain, 53
miles NNE of Red Mountain. Lucky our crew got any work done that day with
such a magnificent view! |