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Radio Society of Harrow

Welcome to The Radio Society of Harrow, G3EFX

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

In the UK there are three levels of Amateur Radio licence – Foundation, Intermediate and Full. The Radio Society of Harrow runs Foundation and Intermediate training courses. Over 200 people have taken our training courses and become Foundation licensees or progressed to Intermediate level with us. All students receive a year's free membership of the Society when booking on a course.

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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

    There are no upcoming events at this time.

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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.

    Learn more about membership »