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Videos
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07:18
How to repair EF Johnson challenger Ham transmitter shorted high voltage
5.6K views
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4 years ago
D-lab Electronics
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03:39
EF Johnson Viking Challenger Tube Transmitter Plate meter Upgrade How to
2K views
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10 years ago
D-lab Electronics
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14:47
EF Johnson
18 views
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8 years ago
G2P LOGÍSTICA RADIOCOMUNICACIÓN EFJHONSON
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04:25
Kenwood VP5000 and VP6000 Demo Video
7K views
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3 years ago
ECI COMMUNICATIONS
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07:15
K3RA F8DGY QSO SPEED-X BUG KEY
821 views
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8 years ago
f8dgy1972
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