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W1TAG / WD2XES / WE2XGR/3    John K. Andrews   Holden, MA FN42ch   [ w1tag@charter.net ]


Transmitting

137/472 kHz Power Amplifier
137 kHz 5 Watt Amplifier
137 kHz Exciter
472 kHz Exciter
185 kHz Lowfer 1 Watt Amplifier

Receiving

Use of Balanced Transmission Lines for LF Receiving
518 kHz Elliptical Filter

Antennas

LF/MF Transmit Loop Antenna
LF/MF Receiving Loop Antenna

Test and Measurement

Sampling Rate and Receiver Frequency Calibrator
LF Field Strength Measurement
Homemade RF Ammeters
GR 516C Calculator
Receiver Calibration with Loran Lines
Use the WOLF GUI and Loran to calibrate your sound card sampling rate.

Operating Modes

Modes for LF Use
Modes for MF Use
WSPR-15 vs. WOLF Comparisons

LF/MF Experimental Operation

WD2XES License
WE2XGR License
WD2XES Log
WE2XGR/3 Log