Blog
On the blog, you'll find stories of electronics repairs, casual schematics, and reflections on the challenges of circuit design
USSR Generator GRN-3 250kHz - Repair & Teardown
Background Soviet electronics always contained some unusual solutions. Despite its poor quality I find tearing Rus...
PG19 Radio Frequency 50MHz LC Generator - Repair & Teardown
Recently I had the opportunity to repair an early 70s Polish radio frequency generator - PG19. It utilizes a tradit...
XT60 Shield For Enerblock LiFePo4 100Ah Battery
I designed this shield for LiFePo4 battery owned by SP9KJM radioamateur club. It features 6 XT60 connectors because...
Programming Cable For Yaesu VX-7R
I received a VX-7R radiotelephone from Maciej SQ9NJL for checking its functionality and unlocking the 4m band. After ...
Building ILER-40 v3
I can’t recall any serious problems while recreating shortwave receivers, but I have never managed to add a transceiv...
2m J Pole From Measurement Tape - new SOTA/POTA must-have?
I am developing an antenna system for a stratospheric balloon for the Silesian Aerospace Technology scientific club. ...
Leader LBO-524 40MHz Oscilloscope Teardown & Cleaning
Many electronics engineers prefer digital oscilloscopes over analog ones. Considering that a digital oscilloscope all...
13.8V 15A Linear Power Supply From An Old UPS
Since 2021 I belong to DIPOL scientific circle. We deal with all techniques of electronic communication, and an impor...