Tom has built a 20 meter dipole for portable use.The build is based on a common speaker wire dipole build. Using the HF Linked Dipole Antenna Designer from sotamaps.org as a guide Tom set about building his. The parts list is very basic. length twin core speaker wire cut to size 1:1 50 Ohm balun with a SO-239 connector rated for 3 to 30 Mhz at 400 Watts. The intention is to deploy the dipole from a portable 6 meter telescopic mast with the legs supported by 2 to 3 meter long tent poles with 2 to 3 meters of rope extenders. Putting these numbers in to the designer application we get the following results. Using the commonly held belief that its easier to shorten the length rather then extend it after cutting, the speaker wire as cut to 5.05 meters. Next step was to test the SWR of dipole. Running a sweep over the 20m band gave the following results. We were very happy with that as a first attempt. Next steps will be to use this as a starting point for a linked dip
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T he East Leinster Amateur Radio Club (ELARC) will continue the portable nature of the station and will be transmitting this week's news on 4m from the hills outside Skerries, County Dublin. The club will be putting out a few radio check calls from 1015am on 70.400 using the callsign of EI 0 EL This location has given us good coverage into Louth, Meath, Westmeath, Dublin, Wicklow and Kildare in the past. Date : Sunday 3 April 2022 Time : 1030am local time Frequency : 70.400Mhz Looking forward to talking to you either before the news or during the call-ins.
We continued the travelling nature of the station and transmitted from Kippure in the Dublin Wicklow Mountains, Grid IO63ue, SOTA Summit Reference EI/IE-005. Arriving at the base of the summit about 8:45am we re-checked our gear was securely packed and made out way to the top. The weather was dry and overcast. It was pretty windy at the summit so we set the station up in a suitable location and improvised a shelter with a tarp in a effort to limit the wind noise. This also helped with sheltering the stove while brewing the all important coffee. Members of the Dublin Wicklow Mountain Rescue team who were on routine patrol in the area dropped by for a chat and showed great interest in what we doing. We're not sure but it might have been the smell of freshly brewed coffee and chocolate biscuits that piqued their interest. The club would like to thank all callers but especially SWL's and those who get out and operated mobile to call in to the service. A rough map of todays call in