SP9VFD antenna system for EME

EME communications have fascinated Rafał SP9VFD from the very beginning of his amateur radio hobby, ie since 1991, when he received the first license at the age of 15. At the time, his favorite reading was UHF guide  “Poradnik Ultrakrótkofalowca”  by SP6LB. However, it was only in 2007 that he managed to carry out the […]

GNI-r6 controller for RAS, SPX AZ/EL and BIG-RAS azimuth/elvation rotators

A new rotator controller model is available for rotating VHF antennas in azimuth and elevation. Below is a quick guide for the GNI-r6 antenna rotator controller. Introduction. The GNI-r6 controller supports one dual rotor with DC motors for azimuth and elevation rotation that has pulse outputs (pulser or reed switch). Antenna rotation is possible with […]

Our satellite activity

After a series of meetings on VHF subjects in our HF5L club, we started to prepare for work through amateur satellites. March 8, 2019 Piotr SQ5JUP made the first contact from home QTH via FOX-1D satellite (AO-92) on FM using the X300 antenna + duplexer MX-72A + IC-9100. As you can see, you can do […]

GNI-r5 controller for RAU, RAK, BIG-RAK and RAEL rotators

Rotary antenna rotator controller. A new model of the GNI-r5 antenna rotator controller is available. Compared to previous versions, it has new features and a new steel casing. The following is the shorted operating manual for the GNI-r5 antenna rotor controller.           Introduction. The GNI-r5 controller supports one rotor with pulse […]

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:

The Great Orchestra of Christams Charity transmits from the stratosphere

Colleagues associated in SP6ZWR and SP5MASR to celebrate the 27th edition of the Great Orchestra of Christmas Charity released amateur radio balloons with SSTV, RTTY and APRS transmitters for the 2 m and 70 cm bands. Using the FT-991, the MA-1300 omni-directional antenna and the MMSSTV program, I managed to pick up several pictures. The […]

Meeting with representatives of the designers of the Polish student satellite PW-SAT2

Updated: 2019-01-27 In the HF5L Club on 19 January 2019 took place a meeting with the representatives of the constructors of the Polish student satellite PW-SAT2: Piotr Kuligowski SQ4NOW and Kamil Sażyński SQ5JRN. Piotr has presented many interesting technical, electronic, organizational details and the history of the creation of the PW-SAT2 satellite mission. The meeting […]