Tag: portable vhf

RSGB #2 Hill Toppers Contest

Today I took part in the RSGB 144 MHz contest operating 10w and a 9e Tonna at 6m. The weather was warm and wet, with light rain. I decided to retreat into the boot for some /P

Operating from the Kelvedon Hatch SNB contest site.27015052133_e00ed7b6b2_k The antenna was supported by the Racal PU12 mast.

The band seemed very active as the contest was arranged to align with the 144 MHz Practical Wireless low power contest.

I started round 45 mins late, and closed the station down by 1pm so only operated for 2.5 Hrs.

Best DX was EI at 527 KM, was pleased to work into GW and France and nice to hear Cornwall.

m0taz_p_backpackers

 

 

 

 

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RSGB Christmas cumulative contest

Today I operated alfresco with George M1GEO from our contest site at Kelvedon Hatch SNB. Operating as M0TAZ/P from Kelvedon Hatch SNB in JO01 we managed to operate 3 bands, 144, 70 and 50 MHz.

The contest was a RSGB Christmas Cumulative Contest and we entered as the Secret Nuclear Bunker contest group.

M0TAZ view SNB

Portable Equipment

144 MHz 9e portable tonna Gain: 13.1dBi free space

50 MHz a G0KSC designed 50/70 MHz beam Gain: 8.6dBi free space
70 Mhz a G0KSC designed 50/70 MHz beam Gain: 8.5dBi free space

The 50/70 MHz interlaced beam is interesting as it uses a single feed line, and respectable gain for a 2m boom length.

Racal 12m PU12 mast. Push up 12m mast

Mast head preamp 11 to 18 dB gain.

Power was provided by 110 Ah leisure battery

Radio Icom 7100 at 50w.

Masthead amplifier for 144 MHz provided by George M1GEO. The design was originally published in the RSGB magazine RADCOM plus  issue 1 designed by Ian White GM3SEK. The details are published on his website, detailed as the DG8 low cost, high performance preamp for 144 MHzDG8_144_mast_ampConditions seemed good to the North, allowing us to work some good DX. On 144 MHz our best DX included GM4JR in IO85 (368 km) , MI0SMK in IO64 (524 km) and GD8EXI in IO74 (429 km)

Maps showing the QSO enclosed.

144 MHz

144cc

70 MHz

70cc

50 MHz

50cc

 

Thanks to everyone we worked, from a rather chilly Kelvedon Hatch.

 

m1geo_m0taz