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Experimental Methods in RF Design -- Immerse yourself in the communications experience by building equipment that contributes to understanding basic concepts and circuits.

Hints & Kinks--17th edition -- Now including the popular Hands-On Radio column from QST Workbench.

ARRL's Vintage Radio -- Articles about the lure of vintage Amateur Radio gear.

Digital Signal Processing Technology -- Essentials of the Communications Revolution. An understandable presentation and reference on DSP in contemporary communications technology.

The Electronics of Radio -- Temporarily Out-of-Stock! -- This advanced-level textbook uses the practical approach of making a real ham rig (the NorCal 40A) to teach radio electronics.

Feedback - January, 2003 QST

In the December "How's DX?" column, p 81, the caption for the FO0MIZ QSL card should have read, "Kan, JA1BK, operated first from the Marquesas Islands and then quickly thereafter from the Austral Islands along with Bob, W6RJ, and Rob, W6KR." Also, the FO0FI QSL card on page 80 was from the Austral Islands, not the Marquesas Islands.--tnx JA1BK
In Figure 2D of "The EQ5+ Microphone Equalizer" [Dec 2002, p 43], the LEDs, D1-D21, are shown reversed.--tnx W4KEB
The photo of W5JBP and K1TWF ["At the Foundation," Nov 2002, p 97] was taken by Gene Hastings, W1VRK.--tnx K1KI
The photo of N3WO ["Up Front in QST," Dec 2002, p 20] was taken by Richard Stewart, K3ITH.
Figure 2 of "The N0GSG DSP Radio Direction Finder" [Nov 2002, p 31] shows a switching situation in which ANT 1 and ANT 4 can be on simultaneously. That is not correct. The waveform drawing should be skewed so that the first switching pulse for ANT 4 completes its rise and fall transition before the second switching pulse of ANT 1 begins.--KS4RN