Category: Ham Radio

Multipurpose RF Proto Board v2.0

This is a general purpose PCB that I designed in KiCad as a helper board for my Manhattan-style mounted RF projects. A link to the first version is here, but the text is in romanian. The original idea came to me after getting tired of using perf boards and bread-boarding for my prototypes. I wanted …

101dB Attenuator design in Fusion360

A timelapse of Fusion360 design of the case of the 101dB attenuator project.

Mini N connector – timelapse in Fusion360

I needed this 3D design for a mini N connector that I have in my shack but I was unable to find any 3d file (.STEP etc) online. The connectors are used for my 101dB attenuator project. Enjoy ! Greetings.

Project status – 3D printed antenna rotator (16/09/2021)

My 3D printed antenna rotator project for ham radio satellites. Status 09/16/2021

Project status – 3D printed antenna rotator (12/09/2021)

This is a short video about the progress of my 3D printed antenna rotator. Unfortunately only in romanian for now, but captions will be created soon.

Tuzla 2020, Field day

I published on my YouTube channel a video about the ham radio Field Day event at Tuzla, Romania, 2020.

LTSpice simulation of Baofeng UV5R band selector

I was quite busy the other day trying to understand how Baofeng is using RDA1846 transceiver in their products. While analyzing the schematic it struck me the overcomplicated way they do the switch between UHF and VHF. This is an excerpt of the schematic: The entire selector block is made up with discrete components ! …

AD8307 RF Power Meter II — boards from JLPCB

I ordered the boards for this project with JLCPCB in China. This is my first attempt of working with a professional PCB manufacturer and I am extremely pleased by the results.

AD8307 RF Power Meter

My first finished KiCad project is a prototype of a RF Power meter with input attenuation built around an Analog Device AD8307. An excellent tutorial about log amps can be read in March 1999 edition of Analog Dialogue. KiCad PCB: And the 3D rendering of the same PCB: The next step will be PCB ordering, …

TH-D74 BLE or „Bluetooth Low Energy”

Struggling to understand how Universal Unique IDs work (see here) I was wrongly assuming that Core Bluetooth is a framework from Apple that covers all aspects of communication with devices via BT. I was WRONG ! scanForPeripheralsWithServices method and, in general, what I tried to do, for almost a week, is NOT good for my intended …