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Dip Switch Freq Programming for R123 and R317 Aviation Rcvrs

Dip Switch Freq Programming for R313 VHF and R307 UHF Rcvrs

Dip Switch Freq Programming for R121/R122 Aviation Rcvr

Dip Switch Freq Programming for T301, T304, R301, R304, and newer R302's

Dip Switch Freq Programming for R305 and older R302's

Plans for ATV Modulator to use with TA451 Exciter

How to link remote phone line to repeater for autopatch

Check Out Hamtronics in Space

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