The radiation pattern in the vertical plane perpendicular to a horizontal dipole over perfectly conducting ground is given by the equation: where α is the angle to the horizon (the radiation characteristics in the facade perpendicular to the axis of the dipole), and h is the height above ground in electrical degrees (where 360 electrical […]
Author: andrzej
Mosley MINI-32-A antenna test
Mosley MINI-32-A antenna test: assembly, failure, repair, measurements and start of HF5L/p in IARU SSB R1 Fieldday 2019 contest Field work, e.g. FieldDay contests – is a great opportunity to check in practice the suitability, strength and equipment parameters. We have made some test for the Mosley MINI-32-A antenna. Why did we choose this antenna? […]
ICOM IC-705 SDR – A new toy for trips
Icom has presented at HamFair, taking place at the Ariake international exhibition center on the artificial island Odaiba in Tokyo from August 31 – September 1, 2019, a new compact portable QRP IC-705 transceiver, working with the use of SDR technology. Main Features: TX Bands: HF, 50 MHz, 144 MHz, 430 MHz plus 70 MHz […]
Storm Monitor – it’s worth having weather warnings in your cell
After the tragic events in the Tatra Mountains in Poland on August 22, 2019, many people ask the question: could this have been avoided? After all, it was impossible to give an official warning, because as meteorology experts and notable on TV claimed, the expected rainfall and wind did not exceed the alarm limits (!). […]
STORE-LOGGER – Wireless temperature and humidity control system in warehouses
The STORE-LOGGER system is designed to microclimate monitoring (temperature, relative humidity of the air, door opening) in rooms where products sensitive to climatic conditions are stored. It is indispensable wherever applied ISO, GDP and GMP quality systems require professional documenting of cold supply chain and storage of temperature-sensitive products. More information about the STORE-LOGGER can […]
LB-532 – Temperature and humidity recorder with USB interface
Hytherograph LB-532 is a precise recorder of relative humidity and air temperature (with resolution of 0,01°C). It is powered by a replaceable long-life lithium battery, which enables uninterrupted operation of the device for many years. The data collected in the device’s memory after connecting it to the computer via USB, are presented by the Logger […]
HF5L/p in IARU CW Region 1 Fieldday 2019
Participation in Fieldday is our tradition. We could not leave 1-2 June 2019. The following were contributed to the success of the event (in callsign alphabetic order): Ewa SP5-1593, Andrzej SP5DDF, Mirek SP5GNI, Sławek SP5ICS, Marek SP5ISZ, Marek SP5IXS, Zbyszek SP5JSZ, Maciek SP5LCS and Piotr SQ5JUP. This time the station was located near Brok, Poland. […]
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 […]
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: