Amateur Radio

 "Rejoice at simple things, and be but vexed by evil slightly."

 Archilochos, c. 650 BCE

Homebrew QRP Projects

• Xtaflex; Crystal-controlled regenerative receiver
  
• GerMania; A 40m transmitter built from a pair of early, Germanium audio transistors 
• The Talking Doll; The "Doll" receives a makeover
  
• VLF Receiver; Saturable ferrite core mixer
  
• Mikums; A one-tunnel diode, 80m, CW, transceiver 
• Reggie; A one-transistor, 80m, CW, transceiver
  

• Das DereLicht Receiver  

• Das DereLicht; An 80m CW transmitter made from a derelict CFL 

• The Bell Ringer; A "Pixie-esque" 20m CW QRP transceiver

• 80m TTL Direct Conversion Receiver; "One-chip" receiver built from a 7400 NAND IC

• 80m Passive Heterodyne Receiver; "No gain, no pain" 

• One Transistor 80m Direct Conversion Receiver  
• 80m Transmitter With Zener Diode Exciter
• Tunnel Diode Transmitter; An adventure with two dots of dirty Germanium
• Tunnel Diode Receiver
• Parametric Regenerative Receivers  
• 80m 1955 "Retro" QRP Transmitter
• 40m 1964 "Retro" QRP transmitter
• The Vermont Snowflake; an 80m QRPp Transmitter
• 40m DCR with "Polyakov" Sub-Harmonic Mixer; Note; 2SB54 Germaniums & 3.5MHz osc.
• 40m Wheatstone Bridge 0-V-0 Regenerative Receiver; Passive hybrid reverse antenna isolation 
• 40m Cross-Coupled Regenerative Receiver
• QRPp In-Line Directional Wattmeter 
• My Antenna System
• Underground Radio Shack

Information 

• Tunnel Diode Spice Models
• Tunnel Diode Converter Circuits; Article by Erich Gottlieb
• Globe Patrol Receiver Instruction Manual; From a kit that I built when I was thirteen years old    
• Realistic DX120 "Star Patrol" Schematic Diagram; My Novice receiver

 Links