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Operating
Aircraft Reflections and Flutter on 4m by Ross G6GVI
Awards
IRTS 70MHz Awards by Dave EI3IO
Bandplan
Beacon list
Distance records
Getting on 4 m
History
History of 4 m
International Frequency Allocations in the International Geophysical Year by Ivan Stauning OZ7IS
International bandplans
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Firsts
Rules
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Equipment
Amplifiers
Amplifier links
300 W PA Using 3 x RD100HHF1 by Sergey EX8MLE
300w PA using a MRF300AN transistor by Sergey EX8MLE
50w Power Amplifier by Peter SP2DMB
Microwave Modules MML 144/100 mods for 4m by Paul PA0OCD
MRF300 for 50-70 MHz by Sergey EX8MLE
Antennas
Comparison of commercial 4m verticals by Ian Hogan G6TGO
Diamond D-130N on 4m by Marc PA1O
Improvements to the YG5-4 antenna by Marcel Pertus F5DQK
Beacons
70w 4m Beacon PA by Sergey EX8MLE
Beacon Equipment by Bo OZ2M
Filters
A low pass filter for 70MHz by Alex IK0VAQ
Software
Transceivers
FT-847 Modifications by SP2DMB and SP3RNZ
Transverters
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