The work with lithium cells called for voltages to be measured with an accuracy of at least 50 mV, for instance to prevent overcharging of the cells.
Over the years, a number of multimeters have accumulated in my shack – with quite different quality. Now the question was: which meter should I trust? For some of the devices, not even information about their accuracy was available any more.
June 21st, 2020, 08:50 – 11:30 UTC
My second activation of Heersberg.
Wx: Sunny, few clouds, temp about 18°C
Walking time: 25 min up, 20 min down
Ascent/ descent: Approx. 60 vertical metres
Rig: KX3 / 10W, 2.9Ah AGM battery, Palm Pico Paddle
Ant: 22 m end fed wire with QRP L- Tuner as inverted L on a 6m squid pole.
Condx on all bands were good. On the higher bands sporadic E was present which allowed many short skip contacts into EU. k = 1, SFI = 68
1 CW QSO on 60m – 1 x S2S
1 SSB QSO on 60m – 1 x S2S
24 CW QSOs on 40m – 6 x S2S
1 SSB QSO on 40m – 1 x S2S
28 CW QSOs on 30m – 5 x S2S
21 CW QSOs on 20m – 3 x S2S
4 SSB QSOs on 20m – 4 x S2S
13 CW QSOs on 17m – 1 x S2S, 1 x DX
22 summit to summit QSOs with more than 100 S2S points 🙂
A delta loop antenna – especially for the 40 metre band – is not exactly suitable for SOTA. It is huge and requires a lot of space. Furthermore the set up is time-consuming. Nevertheless I’d like to show this design here because:
During sunspot minimum 40 m still offers the opportunity to work a lot of DX.
The delta loop provides the required take off angle to work the DX.
Sometimes space (and time) don’t matter.
It’s fun building it 😉
A possible application could be intercontinental S2S events.
Here is the Link to the 20 metre version of the delta loop. During our DX-pedition (Link) to the Principality of Liechtenstein in Sept. 2013. DL4AAE worked hundreds of JA’s on 20 metres with this antenna and 100 W output power.