FT-857d No PTT with RM-59 mic

[W4PGM]

I have checked the strapping on both units for proper and continuity and both passed.  Radio does turn on. passes audio but no PTT.   When I put headsets in the remote box and hit the PTT the audio is not muted.   The radio is set to use the RMT mic ( RM-59).  Will the remote rig work with this mic?

Also, to hard test PTT can I short the PTT line to Ground on the unit side (not the mic  side)  of the strapping?  If not what is the test to test PTT on each side of the box?

Paul de W4PGM

[sm2o]

Hi
No the RM-59 will not work Im afraid, it uses some kind of data protocol to transfer PTT and buttons. You better use a simple standard Yaesu Mic MH-31 for example.

73 de mike

[W4PGM]

Thanks, it took some digging but I found the original mic and all is well.  Now to test from a remote site.

Paul de W4PGM