FCARC Technician Class

January 2012Session 1, Part 2: Repeaters

Revised April 2013

Repeater Concepts:

- Output frequency: a user listens on this frequency

- Input frequency: a user transmits on this

- Offset: usually +/- 600 KHz on 2 meters, +/- 5 MHz on 70 cm

- Subaudible tone: used to prevent repeating interfering signals

2 meter repeaters near Greenfield

440 MHz repeaters near Greenfield

Franklin County Amateur Radio Club Repeaters

2 meters (Frizzell Hill, Leyden) input frequency: 146.385 MHz output frequency: 146.985 MHz

70 cm (Rocky Mountain, Greenfield) input frequency: 443.875 MHz output frequency: 448.875 MHz

CTCSS tone: 136.5 Hz (both repeaters)

KB1MSU (GHS) line of sight

N1AW (Leyden) line of sight

N1AW

KB1BSS repeater (Leyden) line of sight

KB1BSS repeater site from Poets Seat

KB1BSS repeater site, LeydenMt Monadnock on the horizon

KB1BSS 2 meter antennaon FM station tower

KB1BSS 440 MHz repeater, line of sight

KB1BSS 2 meter repeater control apparatus

KB1BSS 440 MHz repeater antennas on Rocky Mountain(Poets Seat) above Greenfield

Equipment rack, 440 MHz repeater

Equipment rack, 440 MHz repeater, rear view

How about a few questions?

T2A01 (B) What is the most common repeater frequency offset in the 2 meter band? A. plus 500 kHz B. plus or minus 600 kHz C. minus 500 kHz D. Only plus 600 kHz ~~

T2A03 (A) What is a common repeater frequency offset in the 70 cm band? A. Plus or minus 5 MHz B. Plus or minus 600 kHz C. Minus 600 kHz D. Plus 600 kHz

T2B01 (C) What is the term used to describe an amateur station that is transmitting and receiving on the same frequency? A. Full duplex communication B. Diplex communication C. Simplex communication D. Half duplex communication

T2B02 (D) What is the term used to describe the use of a sub-audible tone transmitted with normal voice audio to open the squelch of a receiver? A. Carrier squelch B. Tone burst C. DTMF D. CTCSS

T2A02 (D) What is the national calling frequency for FM simplex operations in the 70 cm band? A. 146.520 MHz B. 145.000 MHz C. 432.100 MHz D. 446.000 MHz