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My First 4m 70MHz Band Net - Retevis RT9000D - YouTube
If You've Not Tried The 4m 70MHz Band Yet You Should! - YouTube
Tony Allen EI4DIB, (Drogheda,Ireland).: 4m Band Plan.
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4 Meter Band. Economical Cheep Receiving Low Loss 70MHz Band-pass Filter
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50/70MHz LINEAR AMPLIFIER 500W (6/4m BAND) BOARD MRF300 INCLUDED | Dxworld-e
Quintech PUL 070A 70MHz to L-Band Upconverter - Satcom Solutions