The HRC K6EAG repeater system consists of three separate repeaters located
in the east
bay hills on a ridge above California State Hayward. The elevation of the
site is 1125
feet above mean sea level. The antennas are mounted to a 70' self
supporting tower.
All runs are through Andrew LDF-4 Heliax.
The system is linked to all repeaters in the K6EAG system during morning
drive hours
(7 am to 9 am) and afternoon drive hours (4 pm to 7 pm) It is also linked
during club nets,
Wednesday 7 to 8 PM and RACES nets (Mondays 7 to 8 PM) Other times the
individual repeaters
operate unlinked.
The 6m repeater operates at 52.76 MHz, with an offset of -500 KHz, a PL of
114.8 is required
to access the repeater. The transmitter output is 100 watts, the W6NBC
designed HRC constructed
home made duplexer loss is approximately 3 dB, co ax line loss is .3 dB, the
antenna is a Cushcraft
"Ringo Ranger" with a gain of 2.15 dBd, the effective radiated transmit
power is about 71
watts. Receiver sensitivity is -123 dB, with the system loss and gains the
sensitivity
is -122.5. The equipment is an RCA V-TAC VHF low band repeater modified to
operate on
the amateur frequencies.
The 2 Meter repeater operates on 145.130 MHz with an offset of -600 KHz, a
PL of 127.3 is
required to access the repeater. The transmitter output power is 40 watts,
the Store Bought
TX-RX 6 cavity duplexer has a loss of 2.5 dB, in addition a EMR circulator
is installed with
a loss of .6 dB, cable loss is .7 dB and the antenna gain is 2.15, thus the
ERP of the
K6EAG repeater is approximately 26 watts. Receiver sensitivity is -133 dB,
with the system
loss and gains the sensitivity is approximately -131. The equipment is a
Motorola MSR-2000
VHF Mid band repeater modified to operate on the amateur frequencies.
The 70cm repeater operates in 444.825 MHz with an offset of +5 MHz, a PL of
127.3 is required to access the repeater. The transmitter output power is 40 watts, the
Motorola duplexer has a loss of 3.9 dB, the co-ax loss is 1.6 dB and the antenna gain is 3.1 dB,
thus the ERP of K6EAG 70 cm repeater is approximately 22 watts. Receiver sensitivity is -130 dB,
with the system loss and gains the sensitivity is approximately -125 dB. The equipment is a
Motorola Micor UHF repeater modified to operate on the amateur frequencies.
The controller is a LINK RLC-3, equipped with a digital voice recorder a
real time clock and a host of other features such as voice mail, instant signal check. The system
is equipped with back up power and is located at a secure site.
