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MFJ-1708 - RF Sense Transmit/Receive        
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MFJ RF 感應式收發切換器. 當您的接收機與發射機是分離的兩台設備, 而想要共用一支天線時, 它可自動在兩台機器切換而共用天線.
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Instead of using RF sense to switch the antenna, a control line input lets your key/keyer or PTT line switch the antenna. An adjustable time delay circuit gives you delayed switching. This prevents your antenna from switching between dots and dashes or between syllable and words.

Works on all modes -- CW, AM, SSB, FM, and digital modes. It handles 200W SSB PEP. Compact 4 W x 2 5/8 H x 1 1/2 D inches.
It has SO-239 coax connectors for antenna, transmitter, and receiver. It has control input, auxiliary contact closure to ground, time delay screwdriver adjustment, power jack. Requires 12 VDC or 110 VAC with MFJ-1312D.
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