GB3DA 2m FM Voice Repeater

GB3DA is the primary 2 metre FM voice repeater for Essex. Based at Danbury Hill near Chelmsford, its central location makes it ideal for general coverage of the county. Its has Mk2 CUL logic and a 6-cavity diplexer from Procom/Telewave. GB3DA switched to full 12.5kHz operation in Sept 1999.

Frequency 145.125 MHz Input, 145.725MHz Output, Channel R5 (RV58)
Transceiver Tait T198, 12.5kHz BW **
Access Continuous CTCSS-Only, Tone-H 110.9Hz, Ack='K'
Power 25W erp
Antenna Procom 3dB Colinear
NGR TL 779 050
Locator JO01GR
Antenna Height 110m above mean sea level (Base of mast is 100m msl)
Coverage Maps General Area , Southend

The ERG Gallery has pictures of the DA Radio(s) and Aerial etc


  • The original and spare Tait systems are known as DA-1 and DA-2 respectively.
  • **An Upgrade to DA-3 that uses a pair of ADI radios is in progress
  • GB3DA does not support DTMF/Echolink - please use MB7IDA