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Welcome to The Radio Society of Harrow, G3EFX old 2

Keeping in touch during the Covid-19 crisis

Please see the Arrangements for Club Activities During the Covid-19 Crisis statement from our chairman, as well as how we are keeping in touch and ensuring the welfare of our members during this difficult time.


Amateur radio is a popular technical hobby that uses radio frequencies for exchange of messages, wireless experimentation, self-training, and emergency communications. It is the only hobby governed by international treaty.

Radio amateurs transmit radio signals on a number of designated frequency bands for various purposes:

  • Contacting people all over the world
  • Competing in international competitions to test good you are as an operator
  • Technical experimentation — many of the leaps forward in radio technology have been initiated by radio amateurs
  • Communication through amateur satellites or with the International Space Station
  • Providing communications at times of emergencies


Foundation & Intermediate
Licence Training Courses

The Society runs Foundation and Intermediate training courses, these are shown in the Events section of the website (click here) - usually on consecutive Sundays at our Club Shack (click here)

At Foundation level, the course fee is £25 plus £27.50 for the exam. The Intermediate course is £32.50 + £32.50 exam fee.

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GB3HR, The Harrow 433 MHz (70 cms) FM Repeater

A new UHF Base Station has recently been installed and is running 9 Watts erp from our site near Harrow Weald. The new transceiver consists of a Kenwood TKR 851 running 12 Watts RF output on 433.350 MHz and receiving on 434.950 MHz. The station will relay FM transmissions when a continuous sub-audible tone (CTCSS) of 82.5 Hz is sent. The station identifies as GB3HR D in Morse Code, the D denoting the sub-audible code 82.5 Hz. The station has also had a new 6dbD gain collinear antenna installed and this has greatly improved coverage throughout Watford, Harrow and surrounding areas.

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Club Events

  • Upcoming Events
    1. Thursday Club Net 20.15 – 21.00, 145.350 MHz

      April 2 @ 8:00 pm - 9:00 pm
    2. Sunday Club Net 14.00 – 15.00, 145.350 MHz

      April 5 @ 2:00 pm - 3:00 pm
    3. Thursday Club Net 20.15 – 21.00, 145.350 MHz

      April 9 @ 8:00 pm - 9:00 pm
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    Membership fees

    Full membership £20 (£18); Concessionary: £12 (£11);
    Family £30 (£26); Junior £6; Supporter £5.

    We like Direct Debit payments - price shown in brackets.