49:1 UN-UN for EFHW Antenna...

 UN-UN transformer construction for HF use (1-30 MHz)

 The winding...

 

 Boxed...

 

Test with NanoVNA from 1 to 30 MHz (without 100pF Capacitor)

Adding the Capacitor to improve higher bands...

Success...!!!  Ready to install.

QO-100 antenna reduce and setup upgrade...

Uninstalling the 1.5m dish (that was too big for NB) I install a brand new 80cm dish with the same POTY feed. Thanks George SV5KJO for donation.

New setup with ADALM Pluto SDR for RX-TX and an x-commercial Power Amplifier. A needed 12v to 28v step-up converter for PA and a step-down converter 12v to 5v for PLUTO and midrange preamplifier. Thanks to my good friend Tom SP5XMU for power amplifier...!!!

Testing the Band-Pass 2.4 GHz filter, power drop-down...

Tuning the step-up converter for 28v....

 

 QSO with FT8WW on QO-100 satellite....

Es'hail QO-100 Geostationary SAT from our club station

 At October 23 we manage to make about 35 QSOs after the antenna installation at our club station SZ5RDS. The antenna is 2,4 meter diameter dish with prime focus and a dual feed antenna for 2,4 GHz and 10 GHz LNB. The power amplifier was an EDUP-AB300 8w (2,5w in real world) driven by two SPF-5189z preamps in cascade. The radio used was my ADALM PLUTO SDR with TCXO modification for stable RX-TX. Software for RX-TX was the very impressive DJ0ABR Linux Tranceiver v 1.70.

A big thanks to SV5AZP, SV5KJO, SV5SKE, SV5SKF as Satellite expirement team.

Hope to have soon a permanent installation and hear you via the satellite...!!!

 

 SX5A Special Call Activity

 

 

 

It was March 25, 1821, when Bishop Germanos of Patras raised the flag of revolution over the Monastery of Agia Lavra in the Peloponnese.

The cry “Freedom or death” became the motto of the revolution.

The Greeks experienced early successes on the battlefield, including the capture of Athens in June 1822, but infighting ensued. By 1827 Athens and most of the Greek isles had been recaptured by the Turks.

Just as the revolution appeared to be on the verge of failure, Great Britain, France, and Russia intervened in the conflict. The Greek struggle had elicited strong sympathy in Europe, and many leading intellectuals had promoted the Greek cause, including the English poet Lord Byron.

At the naval Battle of Navarino, the combined British, French, and Russian forces destroyed an Ottoman-Egyptian fleet.

The revolution ended in 1829 when the Treaty of Edirne established an independent Greek state.

I made in total 2.401 QSOs on HF and QO-100 Sat.

CW, SSB and RTTY.

Thanks all OMs around the globe for their support...!!!