The ISS has two digipeaters. One on 145.825 MHz and another on 437.550 MHz. The 2m being easier to use, as you don’t really need to account for doppler is the most popular. Though the 70cm was in widespread use when the 2m went offline a couple of years back.
Prompted by Michael’s effort at acquiring NOAA Weather Images I thought I’d see what other telemetry or data was easily and publicly available from satellites. Sever satellites operate amateur radio transponders and you can listen in on QSOs, but some also allow you obtain satellite and experiment telemetry.
My first attempt was to get the telemetry from Funcube-1 (AO-73).
‘Summits on the Air’ is a great way to operate an amateur radio station in a portable environment. In Ireland there are plenty of summits, of varying difficulty, to choose from. And you will nearly always manage to make contacts, especially if you can spot yourself on the sotawatch cluster, as people around the world really want to work you.
However, setting up a station, particularly for High Frequency, get’s you noticed. It can involve having a mast about 7m high and 20m of an inverted V dipole hanging from it! This invites attention from hillwalkers – especially if you fly a SOTA flag from the mast!
I’ve produced this leaflet to give out to such curious members of the public who come over for a chat. It’s mainly for Ireland but can easily be adapted for other counties and covers the basics of Summits On The Air.
I use lithium iron phosphate (LiFePO 4) batteries for my Summit On The Air Activations, any any time I’m operating portable really with my Yaesu FT-817 or FT-897D. They give reliable power for a long period of time and crucially for me – don’t tend to explode as much as LiPo batteries! (search youtube for ‘LiPo explosion’ !)
They do however need a special charger – you cant just plug these into the charger you use for you NiMh AA’s. Unfortunately there are a lot of options for chargers out there, the majority of which on ebay etc. seem to be clones. Now I don’t mind buying clones of some products, but for things that are liable to lead to a fire if they fail I’d rather stick to branded originals. And the charger that I was advised to get and I’m still happy with is the SKYRC iMAX B6.
For the 40m counties contest in May I decided to go up Tonlagee. There is a steep but short route up to it from the ESB car park and since the weather was nice I decided to stay overnight. Weather for the contest was good, but the propagation was terrible especially for a low power station, still an enjoyable afternoon up there chatting to people who came over.
What really makes camping in the wilds of Wicklow worthwhile, apart from the silence, darkness, remoteness, lack of people all night, general solitude (can you tell that I used to really enjoy heading to the hills for a few days?) – is the mornings. Here are some photos:
I did my first SOTA activation on Lug in September for the 2m/70cm IRTS contest. I won the 2m contest and did well in the 70cm considering I just had a Baofeng handheld.
However Lug is windy. It’s the highest summit in the East of Ireland and it was a particularly windy and occasionally wet day. So not the time to try and get a 10 element antenna working portable. After it blew down hard a couple of times, I settled for setting it up couple of meters above the ground and was only just about able to turn it in the wind. Worth experimenting with again, but in better weather.
It’s taken a while but I’ve finally managed to activate my nearest SOTA summit! Two Rock Mountain is the highest of the three SOTA summits in County Dublin, at only 536m. Nearby is Three Rock Mountain which has great views over Dublin City and a transmitter site near the summit transmits most FM radio and TV to Dublin. Continue reading Two Rock Activation→
Kippure is one of the more popular SOTA summits in Wicklow. Probably because it has a nice road going up to it! The gate at the main road is usually closed – access is only for crews working on the transmitters, but there is parking for a few cars at the gate. This being on one of the main roads from Dublin you should not leave valuables in your car – I’d even suggest removing the boot cover and leaving the glove box open as there have been a spate of car break in’s this summer in the hills. Continue reading Kippure Summit Activation→
After passing my Class B Amateur Radio licence last year I intended to learn Morse Code in order to get the Class A license, and a “two letter” callsign. The morse requirement for a Class A license is to be able to rend and receive a paragraph of plain english text, sets of numbers, and a set of special characters and pro-signs, at at least 5 words per minute. I passed the exam in February, though I would advise finding out the structure of the exam in advance – I didn’t know what special characters were on the exam until the day or two before and had to hastily learn them!
Last Monday I had a meting at the Wicklow Mountains National Park office, and with Trooperstown so close I thought it would be a shame not to go up and do an activation. It’s a 4point summit, EI/IE-035.
Coillte provide a car park just before the bridge over the Inchavore River (T 160 970), but if you are feeling lazy you can drive up the forest road and park where the trail up Trooperstown starts (T 164 962). I found the forest road fine in my wifes Ford Fiesta, there is parking for a couple of small cars at the trailhead. Continue reading Trooperstown SOTA Activation→