Category Archives: electronics

Project sources, schematics (in PDF also), and a readme https://github.com/glenenglishgithub/Locker-4 Recent changes : Added LVDS diff receivers for better performance and more sensitivity at low frequencies. Modified input amplifier to have better midband gain. change to 2 layer PCB, 0603 … Continue reading →

The performance of the VK1RGI packet digi on 145.175 MHz was clearly degraded on its best, or capability, and so it has been replaced.. The original install was a 1990s TNC2 and a FM-828 PMR radio.  FM828s make good split … Continue reading →

A friend gave me this radio to evaluate just how clean or dirty this low cost ($100) 146 / 440 MHz 25W mobile dual bander might be. The answer is pretty bad. It has a similar in-sub band spur output … Continue reading →

I’m putting a Ryzen system together for evaluating the AMD work. It’s important to support the Intel competition. My system is a 1700  on a B350+ Asus , 128GB M2 SSD, 4 xGB DIMMs 2400. 8GB? this is a cheap … Continue reading →