On Saturday 26 July I activated SOTA summit Ditchling Beacon
(G/SE-006). Although there is a bus from Brighton to Ditchling, I enjoy walking so
I took an early train to Lewis followed by a 10km walk along the South Downs
Way. My plans went slightly awry when
the Southern train broke down at Haywards Heath, but after a 30-minute delay we
arrived at Lewis. This section of the
South Downs Way is well signposted and so I did not get lost this time. My pack
was a little heavier than usual. It was a very hot day so I carried extra
water, not knowing that there would be an Ice Cream van, also selling water
(but two quid a small bottle!), at the Ditchling car park. The walk took around 2 ½ hours,
including a short sandwich stop.
| M0BGR/P at Ditchling Beacon, G/SE-006. July 2014 |
I have never suffered a catastrophic failure on one of these
expeditions but today was the exception. I use a small plug box (in the foreground of the photo) so I can
quickly connect several items to my lead-acid 7.2Ah battery. I wired up the FT-817 and
switched it on while I set up the Super Stick HF antenna. After about 5 minutes
there was a bang from the vicinity of the plug box and the 817 reverted to
internal batteries. I quickly disconnected the lead-acid battery and began to investigate,
thinking something had shorted. All the external wiring seemed OK so the
problem had to be in the plug box.
I carry a small tool kit but I had omitted to include a small
Posidrive screwdriver, required to open the plug box, and a multi-meter which would have been helpful
when fault finding. I could have carried on by either using the FT-817 internal
batteries, which would have lasted about an hour, or directly connecting the
817 to the battery – a little inconvenient as I could only power one item at a
time. I decided to investigate and was able to open the plug box, carefully,
with the tip of my pen knife blade. The
inside was a complete mess! It used to have an electrolytic capacitor but this
had blown itself apart. As this was not required for battery operation I
surgically removed it, cleaned out the wreckage, put the box back together again
and re-connected everything (carefully!).
The 817 was still not receiving power but checking fuses
without a multi-meter is difficult and none had obviously blown. I am a bit
fanatical about fusing everything and there were three fuses in the 817 circuit.
Fortunately I carry spares, taped to their respective leads so I opted to
replace them all even though only one should have blown. I had been some time
since this plug box had been used. I powered it up before leaving home, but
only for a few seconds, so I guess this was not enough to reveal a weak electrolytic
capacitor even though this was adequately rated for the job (100 uF, 25V).
Next time – check tool kit, test everything properly,
before leaving home, and carry a multi-meter!
Finally, I was on the air and firing on all cylinders. This
was the day of the IOTA contest so I spent most of my time on the WARC bands,
with occasional calls on 2m and 4m FM. This was the first real outing for my
new Wouxun KG-UV6D – it performed well. Band conditions were not great but I quickly
worked the four stations I needed for a valid activation, thanks to Mike,
G6TUH, who I worked on several bands and also spotted me on the clusters. I was on the air for three hours and
worked 14 stations, including 5B4KH in Cyprus (Asia-004 in the IOTA contest). During the afternoon lots of people stopped to ask what I was doing. Although this interrupts operating time, I always take the opportunity to explain amateur radio and why it is relevant today.
I
packed up in time to catch the last bus to Brighton, but it was such a lovely
afternoon I decided to walk back to Lewis, after pausing for an Ice Cream! The
walk back was uneventful, apart from getting a painful blister on my right foot
with about a mile to go which I had to stop and sort out (I always carry a basic
First Aid kit). On the walk back I was passed by lots of Ghurkha soldiers who
were doing a 100km run along the South Downs Way that very hot day,
which rather puts my 10km walk into perspective, but they weren’t carrying an
amateur radio station!

and the optional 'long' centre loaded antenna supplied by Garex (www.garex.co.uk).
