RaDAR POTA and SOTA news

Protecting the equipment from the rain

Conditions on HF have not been good for quite some time now. If you’ve ever played with WSPR your signals may be heard worldwide even with conditions as they are but WSPR is not a QSO and doubtfully would be quite as successful if a SSB or CW QSO was taken into account. I think of it much like that as heard during meteor scatter pings.

So I proposed a QRP beacon on 40m to alert human communicators to possible NVIS (Local communications) openings. Calling CQ for hours on end running QRP delivered few results even after alerting other operators to the fact via our WhatsApp groups. It becomes quite demoralising!

Let’s face it, QRP stands no chance when even a 100 Watts get’s you nowhere and on occasions even a few hundred Watts!

The proposal for “another” beacon on 40m was met with mixed results and I know the politics on this. The belief is that the beacons could, and probably do, interfere with rare DX opportunities even when the beacon uses a mere 200 Hz within a few tens of kilohertz bandwidth. There are also no official beacon frequencies that I know of for 40m?

Some found value with the proposal during the past weekend of tests where it was started on the Saturday morning and stopped on the Sunday afternoon. Unfortunately, some time during the day on Sunday, one of the two 7A/Hr SLABS in parallel went short circuit limiting the voltage to 6.8 volts. On fault determination it was cut away and normal recharging of the second battery was successful. This was an eye opener, I’d never seen this happen before with a SLAB!

A YouKIts HB1A was used as a transmitter on 7.037 MHz pushing around 3W. The predefined keying sequence was done using a programmed Arduino NANO driving a relay board to generate morse code sending “ZS6BNE KG34AC PWR 3W” at around 16 w.p.m. It was just a matter of wiring the relay contacts to the key input of the HB1A through a 3.5mm jack. The Arduino performed pretty well and was still operational even at 6.8 v supply through a dedicated voltage regulator regulating a 5 v supply.

The antenna was a linked dipole in inverted vee form held at around 4.5 m at the apex by a dual back to back painters pole mast. The beacon performed relatively well but more human reports are required to prove it’s viability which was not quite as forthcoming as one would expect. Nothing was heard from the RBN (Reverse Beacon Network) proving DX conditions to be as bad!

The beacon was heard by Dennis ZS4BS in Bloemfontein but the signal was rather weak. Other reports received via WhatsApp were as follows:

Werner in Namibia – “Hearing CW”.

Andy ZS6ADY – “Sig about 449 with qrn…”

Jannie ZS3CM – “Morning Eddie. Can still hear beacon in De Aar. Same as yesterday. Clouds building again. Looks like more rain!!!!!!!!!”

Jannie sent a recording and the signal in my opinion was rather good!

Mike ZS6MSW/p (Natal) – “Moving camp on Wednesday to Northern Berg, hopefully RST noise will be less than 9 plus. THAT beacon was a tremendous assistance to guage our conditions. 73’s”

Eric ZS5EL – “Nothing on 7037 here this morning, I’ll keep monitoring”

The battery failure occured some time on the Sunday.

Eddie ZS6BNE – “Sunday 3rd Februrary 14:15 – Shutting down the beacon.

Thank you for your input …..”

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