My Homebrew Vacuum Tube Amateur Radio Equipment ("Glowbugs")
- 1929 MOPA ( Master Oscillator Power Amplifier ) 80 meter transmitter using a pair of 27 triodes to an 865 tetrode
- A 40 meter MOPA transmitter using a '10 triode TNT oscillator driving an 860 PA, from March 1931 QST
- Shunt Fed Hartley Oscillator using a single type 10 triode
- A 6L6 crystal-controlled transmitter for 80 - 30 meter CW
- An 80 meter MOPA transmitter using three 2A5 pentodes
- An 809 RF final amplifier for the 2A5 transmitter
- A battery powered regenerative receiver using three type 30 triodes
- A two tube regenerative receiver using 6SN7 tubes
- The Grimes Inverse Duplex ( see article below and the schematic here ) picture 1 picture 2
- Replica Spark Gap Transmitter ( circa 1919 design )
- Westinghouse 861 Power Triode
Pix of other amateur's breadboard/glowbug rigs
- W0HIO's "Little Receiver", a 7-tube high-performance superhet with xtal filtering: schematic 1, schematic 2, power supply, picture
- A late 1930s homebrew rack transmitter ( shades of Frank C. Jones )
- Ed Swynar, VE3CUI's fine "1929" style homebrew gear
- NW0O's 80 meter Hartley Oscillator
- NW0O's 865 80 meter amplifier