The Four Metres Website
Search
Primary Menu
Skip to content
Home
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
Links
Firsts
Rules
Submit first
View firsts
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
Contests
Forum
Photos
About
Search for:
Firsts
.
