Tag: portable vhf

50 MHz Trophy Cup

I once again took part with the in the 50MHz trophy cup with the SNBCG, the contest runs for 24 Hrs from 3 PM on Saturday. This year the contest had been booked for one of the hottest days of the year, with temperatures reaching 30C (around 220F in old money)

We set up Saturday morning,  using the 5e 50MHz beam and a 10m pump up mast.  A solid state amplifier provided 400w and a light weight tent to keep off the sun.

The most important issue throughout the weekend was trying to keep cool, with copious cold drinks from the fridge. Fred G3SVK was kind enough to lend us a fan and this became an essential item for the shack.

Fred spent some time operating on CW, working mostly EU with the odd notable exception.

In total, we worked 250 stations, with our best DX being 5B4AAB at 3161KM. You can view the claimed scores here and map here.

144 MHz Backpackers and Hill toppers contest

Sunday 11th June was the #2 backpackers, hill toppers and QRP contest. The RSGB contest ran from 10 till 2 PM and had two categories 25w or 5w. I decided to enter the 25w category, the radio had to be battery powered and the power limit was 25w.

The antenna was a 9e tonna mounted on a Racal push-up mast at 6m. You can read the complete rules online.

The exchange is a signal report, serial number and then your locator, so a typical exchange may be 59, 001 in JO01DP.

I worked a couple of stations who was aware it was an activity day, but not aware of their locator. I found the best way is to look it up online or download one of the many phone apps that will do this for you. I started a little late at 10.30 as on this occasion I was operating alone.

Using the Icom 7100 and a 68Ah leisure battery I was able to operate for the complete contest. I used a small netbook to log, it’s important to find something that can be battery powered for the duration of the contest. I did have one unexpected problem, if the laptop was within 1m of the radio it did cause some QRM, interesting, as I had never noticed that before.

Conditions seemed flat, but the bands were very busy, I think this contest coincided with the practical wireless QRP contest.


Over the next few hours I was able to work 75 stations in 4 countries (England, Wales, Isle of Man and Gurnsey) The best DX was 430KM into the Isle of Man.

Thanks to everyone who took part, a really enjoyable afternoon in the sun.

RSGB Christmas Cumulative Contest

The RSGB have a series of Christmas Cumulative contests covering 50/70/144 and 433 MHz. The contest is a chance to put down that turkey sandwich and head out to play some radio in the winter sun. The contest run for 2 hrs, and activity is over 4 days. You can read the rules online, and activity is typically quite high.

This year I joined George M1GEO at our contest site above the Secret Nuclear Bunker in Kelvedon Hatch.

The setup included.

Icom 7100, 9e Portable Tona and RF power was provided by a Linear Amp 300w solid state amplifier. The mast was a Racal PU 12 at 5m as the band was wide open with tropo propagation, this provided some interested DX. Mains power was provided by a silent running 2KW Honda generator.

 

 

 

 

 

We managed to work 51 stations, with our best DX into Spain, EA1FDI in IN53 at 1143 KM.

The QSO map showed some great openings to the South and East.

The temperature dropped quickly once the sun set, providing a spectacular sunset and the motivation to pack away quickly. Altogether a great afternoon playing radio, with some great propagation for a change.

Thanks to everyone we worked, and all the best in 2017.

 

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

 

© 2015 Dave, M0TAZ