In the post “ADALM-PLUTO development kit for (not only) Es’hail-2 satellite”, the topic of the 40 MHz clock generator for Adalm-Pluto and 25 MHz for the LNB satellite converter was considered. The problem of the 40 MHz clock generator is somewhat solved by replacing the original micro-module of the generator with a more stable one, […]
ZOOM application for teleconferences
In the era of a pandemic, it is worth not to lose personal contact and conduct meetings using the teleconference applications. One of them is Zoom, which in addition to team conversation, allows you to conduct computer presentations visible to all participants. Until now, zoom has made remote learning easier for all students. Despite the […]
Monitor for SG-Lab Power Amplifier
The 2.4 GHz 20W power amplifier from the Bulgarian company SG-Lab is widely used among the OMs (including QO-100 sattelite fans) [1]. In addition to the attractive price, this is also due to the excellent workmanship and delivery in the milled aluminum housing. The PA contains three internal directional couplers for measuring input, output and […]
N7DDC autotuner with power over coaxial cable
I made N7DDC popular ATU-100 antenna tuner in the basic version (5×5) in 2019, and I added my experience with it on our website in the post CHA-250B antenna by SP5GNI. The original documentation of the ATU-100 tuner can be found on the Github portal as well as elsewhere (example). The schematic diagram can be […]
Non-contact body temperature measurement – COVID prophylaxis
The LB-669 thermometric gate is used for non-contact measurement of human body temperature, which allows for the detection of people potentially infected with the COVID-19 coronavirus. This stationary medical wall thermometer is fast, hygienic and safe as the measurement is non-contact, maintenance-free and automatic. The result of the measurement with a comment is read out […]
DMR communication in VOT
DMR (Digital Mobile Radio) is an intensely developing future-oriented amateur FM communication system in 2m and 70cm bands, with unlimited range, in which digital radios cooperate with digital repeaters linked by internet connections controlled by a servers system. Thanks to this, theoretically, if our radio is properly programmed with information about DMR network configuration, we […]
SO4M contesting
For many years I have the pleasure to work with Mirek SP4MPG and compete in his contest station located near Olsztyn. I met Mirek thanks to the SN0HQ Team and joint, annual starts in the IARU HF competition. This year, on the last weekend of May, I decided to start in the CW part of […]
Mini-PC for transceiver
What do the radio hams miss on their radio shack the most? The most lacking is free space for the next lumber, as in the example in the shack of Mark MW0RKB. One of the ugliest and senseless boxes that are waste of space, make noise and draw a lot of expensive electricity, are PCs […]
HF5WIM in 2020 SPDX Contest
Congratulations to all my colleagues for great achievements in SPDX 2020! Particularly touching is the photo of Kamil SQ5JRN (I also heard him) with a baby on his lap 🙂 My story: Saturday, getting closer to the contest. I walk around the garden and look at my wires and 2 element beam. I wonder in […]
HF amplifier with MFR101
In 2018, NXP introduced new MRF101 and MRF300 power transistors to the market. They are designed for medium and high power levels in the radio frequency range, where the offer is not so rich. Why are they extremely interesting to the amateur radio community? – First of all – they are cheap thanks to the […]