K5AM


Homebrew station, DM62: 
Photos   
Block diagram
NCJ article: A Homebrew Contest Station

Horse Mountain contest site, DM54.

Homebrew transceiver:
Photo
General description; QEX article: pdf
HF section; see QEX, Nov 2001.   photo   pdf
Receiver third-order dynamic range measurements: 3IMD
Receiver second-order IMD measurements: 2IMD
Circuit Details
Remote RIT

Transverters
Amplifiers
Boatanchors
Antennas
Signal/One CX7 Test, alignment, modifications, repairs, operating.
Misc

Ham radio technical articles, complete list

Selected articles:
"Overload Protecton for High Voltage Power Supplies" download pdf
NCJ article: "A Homebrew Contest Station"
2 Meter KW amplifier: 2mkw.pdf
Hapirat, QST, Sept, 2004. Expanded version: hapirat.pdf
Mathematics

Horse Mountain Six Meter DX Association; W5SIX.

Photos:
K5AM Workshop
Barney the beagle and Nicki the dalmatian
Polly the shepard/beagle mix and Lizzie the beagle puppy
Night sky in New Mexico

Callsign History. K5AM, Canal Zone, 1939. QSL card



photo: Mark, K5AM


Mark Mandelkern, K5AM, was first licensed in 1948 as W9ECV in Wisconsin. Mark's main ham operating activity is 6 meter DX, with 138 countries worked. He also enjoys HF DXing and contesting, with DXCC confirmed on 10 bands and a number of top-ten contest awards. Mandelkern is professor of mathematics emeritus at New Mexico State University.