I am using a SCK (Super Combo Keyer) for two rig, a TS870 and a FT1000MP in SSB (SO2R) In FT1000 mp I have the inconvenience that attenuate me too much the entrance of audio from the mic Heil that I use, the same thing doesn't happen to TS870.- Some suggestion.- Many Tnx 73´Juan LU3HY (LT0H)