It seemed sensible to test the antenna matching before attaching it to a kite however the half wave for 80m was too long to put up at my QTH so i swapped it out for a half wave on 40m and attached it to the matching unit; using a mini VNA and MFJ 259B i set about matching the radiator. The starting point indicated resonance at 6.6mhz so trimming the length i slowly brought it to resonance at 7.04mhz with vswr of 1: 1.2. To achieve this i had to attach a counterpoise of 3m, my only criticism being there was no attachment point for a counterpoise.
The screen shot shows the WSPR test at 200mw from my QTH on the 09/08/2020.
A CW QSO into Kazakhstan at 50 watts was also achieved, it seems to work well.
Great antenna IP65 rating with good mounting clamp setup will report back when i test the full 80m half wave antenna supplied with the unit at field day.
The fox hunt on Wednesday evening turned into a damp affair and was attended by Mike g0jmd, Paul m0znb , Garry g7nvz and John m0hfh. Peter Barnes m0swn was the fox who had gone to ground in the Mundy Playing fields accompanied by Brittany M6LVB. First hound to see the fox was John m0hfh using body shielding and a hand held, second was Garry g7nvz and Paul m0znb bringing up the rear. We had a cream cup cakes as our prize and returned to rock street around 9.15, a fun evening.
Weather is not great for this event however the Mundy playing fields has a car park. The 5 watt Transmitter will be operating from 19.00 hrs this evening, 3.568mhz CW and can be received in Alveston at 599 so try your receivers on the way over and report the distances. The second transmitter will be <1 watt @ 3.579.3 Mhz cw and will be at the Mundy playing fields in Thornbury;decode the Identifiers for both signals and report your findings via qrz or the website or to John m0hfh.
Both transmitters send the club callsign initially G4ABC , with a short message for just over a minute which is repeated at approximately 30 second intervals.
The Fists CW club have some competitions (NOT CONTESTS) organised for the bank holiday week and weekends 22nd to 27th of May.
If you have a vintage radio and would like to Chirp and Drift or warm it up for a few hours Rex and I will be around to help send or receive some slow morse.
How about some AM (amplitude Modulation) ! pre- arranged as its not a popular mode.
The 2m refresher looks interesting, 2 hours per day finishing at 9 pm, Rex and I will be operating from the ridge or Rex’s QTH with a beam for that event.
Let us know if you would like to join us for a cw qso 5 wpm or as slow as you can manage.
For The past 2 weeks you may have noticed some activity at the top of the room , with instruments, a 2m copper tube dipole multiple VNA’s and computers.
I am planning a project and talks on the practical application of smiths charts method of mathematically matching RF loads. There is some way to go before we are in a position start the talks, feel free to ask questions. On Wednesday evening we will be running a capacitor workshop again making values to implement a match created by smiths chart calculations.