Monday, December 18, 2023

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

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

 The winding...




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

Adding the Capacitor to improve higher bands...

Success...!!!  Ready to install.

Monday, December 11, 2023

ISS Primary School Contact from Dodecanese...

 ISS Primary School Contact from Dodecanese

we are ready...!!!!

14 December an ISS contact with Primary School of Zipari Kos, Zipari, Greece
The amateur radio ground station for this contact is on the island of Kos in the Dodecanese in Greece. Amateur radio operators using call sign SV5BYR, will operate the ground station to establish and maintain the ISS connection.
This is a direct contact via Amateur Radio allowing students to ask their questions of Astronaut Andreas Mogensen, amateur radio call sign KG5GCZ.
info school
The Primary School of Zipari is located on the island of Kos in the Dodecanese in Greece. The Island of Kos, with a population of 35,000, is in the southern part of the country. The school serves 400 students aged 6-12 and 45 teachers, and participates in innovative programs such as European Erasmus+ programs and often takes part in Pan-Hellenic competitions.
This year an Astronomy School Club was formed to prepare students for this ARISS contact. Other student activities include participation in the ESA Moon camp challenge (2nd and 6th grade students), robot building, how to track the ISS, and amateur radio communication (including morse code).
The downlink frequency for this contact is 145.800 MHz FM and may be heard south europe.
The radio contact is at 15:17(Greece) - 13:17 UTC
The public is invited to watch the live stream at