Month: February 2019

DX from space

Amateur telemetry reception from ARTSAT2 interplanet probes: DESPATCH and Shin-en2. Authors: Piotr SP5ULN, Michał SQ5KTM, Piotr SP5MG, Łukasz SQ5RWU. Introduction Bands above 50MHz are often treated only as local FM communication channels. Here and there in the radioamateur environment, the opinion is repeated that in this frequency domain nothing particularly interesting is happening, excluding only […]

Electret microphone instead of dynamic and vice versa

Some transceivers have a microphone input adapted to the electret microphone and some to a dynamic one. It is not possible to replace them due to design differences. The electret microphone contains a FET transistor in the capsule, which must be supplied with DC voltage in the same wire as the audio signal. The FT-991 […]

Is there anything interesting above 100 MHz ?

On February 15, 2019, in the HF5L club we hosted  Piotr SP5ULN, who won the first prize for the largest number of received frames from the PW-SAT2 satellite. Piotr gave a presentation on “Is there anything interesting above 100 MHz?”. The main part of the presentation was devoted to the description of the actions that […]

QSL cards sent and received

QSL cards are always a nice surprise, sometimes a surprising content, often an attractive graphic form, a beautiful photo, a reminder of historical events, or advertising … But always QSL cards are welcome! Here is our last selected collection: Our current QSL card: Here’s what is more interesting QSL received: