The term QSL comes from the radio “Q” code meaning “I confirm reception.” During the early days of radio broadcasting, the ability for a radio set to receive distant signals was a source of pride for many consumers and hobbyists. Listeners would mail “reception reports” to radio broad...
Across the 20th century, these cards were used to affirm radio transmission between stations. Few would have guessed that they would look this good, as confirmed in the latest book published by TopSafe.
Meaning the date, that can be different than actual qso date, that was the date when qsl for this qso was set to be handled. And in case of " N", decided to be "not sent" then. Logical? -- Saku OH1KH Top Log in or register to post comments Fri, 2023-02-10 10:44 (Repl...
Here’s how we went on:- The Inn is the ‘Highest Pub in Great Britain’ and being 1732ft ASL it has a great take off for Amateur Radio for sure. But don’t be lead into a false sense of security as the Snow Mobile parked outside the pub is there for a reason! (see inset)....
they affected a large part of the ionosphere. That day, V/UHF bands were closed at high latitudes with auroras in Alaska and up to mid latitudes (>55° with Kp=8). This time the effects of the CME created a radio blackout up to 15 MHz where the attenuation reached till ~35 dB; ...
IPS Radio Space Services, in Australia, like SWPC provided the "Predicted SSN" until they also use data provided by SIDC since July 2015. You can subscribe to IPS Mailist to get the SSN by email but it does not refer to the data used by VOACAP....
- And a more detailed discussion of the analytical form, F(f,h), is found in Section 7.4 (Ionospheric Absorption) of Davies' book, Ionospheric Radio (IEE Electromagnetic Waves Series, Vol. 31), beginning on p. 214. Also, the variation of collision frequency with height is given in ...
The lower boundary of the ionosphere coincides with the region where the most penetrating radiation (generally, cosmic rays) produce free electron and ion pairs in numbers sufficient to affect the propagation of radio waves (D-region). The upper boundary of the ionosphere is directly or indirectly...