A popular part of ham radio is building equipment. Many hams delight in making contacts with a radio they built themselves.
- High Sensitivity Crystal Set by Bob Culter, N7FKI QST January 2007, pp 31-33
- A Simple Regen Radio for Beginners
QST September 2000, pp 61-64
A good project for the beginner, a school science project and Scout Radio Merit Badge. The author after receiving correspondence has additional information he has graciously provided Notes. Authors Web page.
- How to Tune In A Regenerative Receiver
- High Performance Regenerative Receiver Design
QEX November 1998, pp. 24-36
A discussion about regenerative receiver design and construction. Warning--the AD745JN has been replaced by the AD745KR which has a different pinout. Fortunately, many single 8 pin DIP op amps, such as the NE5534, can be substituted with no changes to the circuit.
- A Regenerative Receiver for Beginners
ARRL Handbook 1995, pp. 17.68-17.72
A modern version of the classic regenerative receiver.
- The WBR Receiver
QST August 2001, pp. 34-37
Build a simple receiver between the regenerative and the direct-conversion receivers.
Feedback: QST September 2001, p. 105 (Included in above article)
- A Broadband HF Amplifier Using Low-Cost Power MOSFETs--Part 1
QST March 1999, pp. 40-43
So you finished building your K-2 or K-1. Now what? One watt will get you 40 with this 160- to 10-meter amplifier.
Note: Kits, as indicated in Note #9, are no longer available from Mouser. PCBoard template: kossor.pdf
- A Broadband HF Amplifier Using Low-Cost Power MOSFETs--Part 2
QST April 1999, pp. 43-46
- A Binaural I-Q Receiver
QST March 1999, pp. 44-48
A receiver replaces the narrow filters and interference-fighting hardware and software of a conventional radio with a wide-open binaural I-Q detector. Picture listening to a chunk of the band in stereo with the signal you want smack in the middle.
- An HF 50-W Linear Amplifier
ARRL Handbook 1995, pp. 17.93-17.97
If your QRP transmitter runs 1 to 2 watts, and you would like a little more power. Build this amplifier using a pair of Motorola MRF477s. This part is out of production and may be difficult to find, even though it was around for many years. Template available
- A High Performance Communications Receiver
ARRL Handbook 1990, pp. 30-8 to 30-15
A 5-band, ssb receiver construction project.
- The Principles and Building of SSB Gear -- Part 1
QST September 1985, pp. 17-19
This intermediate-level series is aimed at those who want to build a small SSB transmitter and learn how SSB equipment operates. A practical project is described throughout the series.
Feedback QST November 1985, p. 43 (included in above PDF file)
- The Principles and Building of SSB Gear -- Part 2
QST October 1985, pp. 27-30
We'll examine the speech amplifier, balanced modulator, filter, IF amplifier and carrier generator of an SSB generator.
Feedback QST March 1986, p. 46 (included in above PDF file)
- The Principles and Building of SSB Gear -- Part 3
QST November 1985, pp. 16-19, 43
This installment treats the SSB-generator mixer and subsequent low-level, class-A amplifier stages.
- The Principles and Building of SSB Gear -- Part 4
QST December 1985, pp. 37-40
Let's discuss VFOs and examine a practical circuit for use with our SSB transmitter. Emphasis is on stability and purity of the VFO signal.
- The Principles and Building of SSB Gear -- Part 5
QST January 1986, pp. 29-32
Man does not live by milliwatts alone! So let's learn how to increase our SSB exciter output power through linear amplification.
- A Multimode Phasing Exciter For 1 to 500 MHz
QST April 1993, pp. 27-31
A simple transmitter that generates SSB, CW and more. (a mate to High-Performance, Single-Signal Direct-Conversion Receivers )
- Sam Kennedy, KT4QW, shows how to build your own condenser microphone in the December 2003 QST, pages 28-32.
- "Software for hams, engineers and technicians from Jim Tonne W4ENE"
- Jim Garland, W8ZR’s web page has a control box for rigs and amplifiers, a receiver multicontroller, and a sophisticated automatic antenna tuner.
- Circuit Sage - Making circuit design easy. A new routine every week.
- Elecraft Soldering Tips
"Ask Dr. Solder!" Soldering tips from “Elecraft”
- NTE Numeric Semiconductor Specification Sheet List