#NoDAPL

I believe it’s time to put an end to this kind of insanity. There can be no economic growth if human beings continue…

Differential Amplifier w/ Cathode Follower

This is a circuit designed for a classroom project whereby the instructions were to “improve” a differential amplifier circuit. The differential amplifier design…

Pixie: 40m QRP CW transceiver

first post of 2015. it’s a small pocket size 40m CW transceiver that i got off of eBay for a mere $8. i’ve…

Class AB amplifier test

this was an attempt at designing a simple transformer-less class AB amplifier using two BJT power transistors. i setup the USB fan to…

initial PCB milling test…

here’s an initial PCB test for the Triode tube overdrive on the SMBA site. this picture is pre-sanding. it was milled using LinuxCNC…