Sunday, 2 July 2017

VHF National Field Day

It's some years since I took part in a contest... I was a member of Travelling Wave Contest Group from 2010 - 2013, and further back than that, from 1982 onwards I took part in many RSGB and CQ World Wide Contests in CW, SSB and DATA on a regular basis in my own right.

Since getting back on the amateur bands in January 2017 after moving house, I've wanted to see what I could work on VHF from my new location.
2m band - WIMO 144 MHz 7+7 Cross Yagi up 4m above ground
6m band - 125 feet long OCF Dipole with 4:1 balun at 10m above ground in the Beech Tree in my garden
Despite having a temporary aerial set up 18 reasonably distant contacts were achieved this weekend from my location in Pickering, close to the North York Moors, in Maidenhead Locator IO94of. My garden is 60 metres above sea level. Each headset on this Google map represents a contact on either 6m or 2m:



I operated for a few hours in the Fixed Station Sweeper (FSR) Section. The FSR section states that fixed stations cannot call CQ - we have to search and pounce on stations and try to work them after hearing National Field Day VHF contest stations calling CQ. 

I used a Yaesu FTDX5000 running 150 watts on 50 MHz with a 125 feet off Centred Fed Dipole up 10m in a tree. On 144 MHz I used an Icom 7400 running 80 watts into a Wimo 7+7 Cross Yagi on a 2.7m long boom. The XYagi is temporarily mounted at 4m above ground in a parasol base and has to be turned by the "Armstrong" method. 

Best DX on 144 MHz was EI9E at 441 Kms, located betweeen Kilkenny and Wexford. Best DX on 50 MHz was G2BQY/P at 354 Kms, located just north of Shepton Mallet. The only station worked using Morse was GM4ZUK/P near Aberdeen, a distance of 321 Kms  on 50 MHz.

It was quite a surprise to work such distances on 50 MHz using a wire antenna, and I was pleased with the performance of the Cross Yagi on 144 MHz operating at just 4 metres above ground. 


I did work one SOTA station on 2m SSB in the contest - this was GX0OOO/P operated by John Earnshaw G4YSS from Scarborough. John was on Great Whernside in the Yorkshire Dales and made contacts throughout the day on VHF in the contest and on HF also, including on the 1.8 MHz band (160m) where I also made contact using Morse and Voice Comms.

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