Accessing GB3NM
To access the repeater you will need an FM transceiver capable of UHF
Output frequency : 433.175Mhz
Input frequency: 434.775Mhz
CTCSS: 71.9Hz
Deviation: Narrow
Status: On-Air!
Site engineer: M0VUB
Please note: In order to operate the repeater correctly you must have a +1.6Mhz offset programmed to automatically shift your radio over to the repeaters input frequency while transmitting. PLEASE USE NARROW DEVIATION 2.5Khz (12.5Khz Bandwidth).
*Note this is a standalone talk-through repeater designed for local and wide area use via RF only!
MOTOROLA DR3000 (Standalone)
Time-out
The Motorola FM logic is fitted with a reasonable timeout which will switch off the transmitter if a signal is received continuously for an unreasonably long time. This timeout should never operate in normal use. If on the rare occasion the repeater does time out you will indeed know about it!
CTCSS 71.9Hz
Access to the repeater via RF requires a sub-audible CTCSS Tone. CTCSS 71.9Hz. CTCSS is the primary way of accessing the repeater via RF which helps reduce any opening of repeaters on adjacent frequencies or geological locations within the RF “over-lap”. It is a requirement by the NoV to have CTCSS as primary access to open the repeater. CTCSS 71.9Hz is also sent by the repeater transmitter when a signal is being received on the input. Between overs the repeater stops sending CTCSS. This means that if you run your radio with CTCSS muting (tone squelch) you will only hear speech, never any confidence pips or Morse beacons. If you do want to hear the pips etc. switch off your CTCSS tone squelch decoder on your radio.
Narrow Deviation
It is imperative you program your radio for NARROW deviation. Set your radio for 12.5Khz Bandwidth (2.5Khz deviation). If you use wide (25Khz bandwith) the repeater will sound distorted and you will sound loud and broken into the repeater.
Access (RF)
The DR3000 logic provides all logical control of repeat talk-through & functionality of the repeater. Developed by Motorola, the DR3000 is considered to be a robust commercial talk-through application base station. Paired with AFL BDP-420 duplexer, the Motorola TX/RX units provide ample isolation and basic talk-through capabilities with access by a 71.9Hz CTCSS sub-audiable tone. YOU SHOULD SET YOUR RADIO FOR NARROW (12.5Khz Bandwith) 2.5Khz DEVIATION.
When accessing the repeater from cold you should press the PTT and announce your callsign. This will give time for the repeater to activate. Once accessed you may use the repeater to make a QSO leaving suitable gaps between overs. The repeater will announce it’s ident every 10 minutes while in QSO at a reduced volume. When you have finished your over the repeater will ackowlege with a silent carrier.
The repeater is set up with a standard kerchunk timer. “keying/kerchunking up” the repeater to ‘see if you are in’ without identifying yourself is considered inconsiderate and technically illegal.
Multi-Mode FM / DMR
The DR3000 logic adds modern capabilities to the functionality and maintenance of the repeater. The repeater is stand-alone FM only, with the possibility of having DMR as a secondry mode. The repeater does have MotoTRBO™ DMR TierII capabilities but is disabled at this time. (Coming Soon).
This repeater is stand alone talk-through FM repeater only. No plans are to link this to any wide area network.
Modern Logic. MotoTRBO™
Future Features:
- DMR TIER II
- IPSC
- SITE-TO-SITE Link
- TDMA
“Enjoy, use, but don’t abuse. Re-established at the height of the Pandemic 2020”
-M0VUB, Shane”