FOR SALE: TS-820S CW QSO demo.

homebrew regenerative receiver using 3 x J309 and 9 volts battery on LM386 ( FETs on 5 volts )

This Supercharged Baofeng Radio Picks Up Almost Everything!

The Coolest Radio You've Probably Never Heard Of

How electric trains work and why they make interesting sounds

Every Component of a Linear Power Supply Explained (while building one)