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Licensed since May 1970. Additional call ZD8RD (during mid 1970s). Member of RAYNET. Notices of Variation: GB7SIP, MB7USY. 5MHz permit held. Member of CARC (Crawley Amateur Radio Club).

WAB square TQ34

I worked for GPO Telephones, BBC Transmission Group and BBC Research & Development, HCD Research, a cable television company, the UK Government's Radiocommunication Agency (now OfCom), Thales UK, and now run Smallfield Communications.

I am now officially retired, but take on the occasional interesting contract job to keep the grey matter viable!

I enjoy listening around the bands, and occasionally have a chat (have done more than enough talking whilst ZD8RD in the 70s). Working on getting an ALE system going for RAYNET. Developing a NVIS talkthrough system for RAYNET. Interested in hf digital modes. Interested in spread spectrum schemes for profiling VHF and UHF coverage plots.

I also enjoy photography and here are my pictures http://www.flickr.com/photos/26704509@N06/sets/



Here are some of my old QSL cards

I was stationed on Ascension Island between 1974-7 and held ZD8RD throughout my stay. I worked at the BBC Atlantic Relay Station as an engineer, broadcasting programmes to west Africa and South America.

I also did volunteer engineering work at one of the island broadcast stations, ZD8VR - Volcano Radio on the American base - where my colleagues and I eventually added stereo FM and other enhancements to what had been an AM and mono FM setup.

It was nearly always a volunteer BBC engineer who mended the AM transmitter (an old converted naval transmitter), as it was a valve rig, and most of the American technical staff on the island had very little experience of valve transmitters at that time, as they were there for the much more high tech stuff at the NASA tracking station etc.

A most unique posting!

MB7USY is located in Smallfield village on the Surrey West Sussex border (IO91we). It is an APRS station licenced for 5 watts ERP unattended operation.

It operates on 144.800 MHz using a commercial narrowband transceiver, running 2 watts transmitter power and a co-linear antenna with about 3dBd gain, at 65m amsl.

Due to the close proximity to Gatwick Airport, the transceiver is tightly filtered to avoid out-of-band radiation that could be received by nearby aircraft, and the equipment is carefully adjusted so that the deviation does not exceed the recommendations for 12.5kHz channel spacing. This does mean that some amateur stations have had difficulty communicating with MB7USY. In all cases so far, this has found to be due to them having excessive transmitter deviation, which the receiver at MB7USY was unable to decode.

The RF to internet interface uses a MicroSat Wx3in1 unit.

The approximate limits to the signal are the M25 to the north, Capel (A24) to the west, Horsham to the south and Lingfield to the east.

968211 Last modified: 2014-05-28 22:10:54, 5513 bytes

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