Sorry in advance for the cross-posting. I have a Gates model 944-6701-002 cart playback machine, set up for mono. I don't know if this works, and don't have any documentation for it. Here's what's present in the electronics cage: -- left channel playback card -- 1khz cue card -- psu card It's got Nortronics heads, look in decent condition. Heads are 2-gaps. Apparently, these were made to be configured for either mono or stereo, this one's mono. There also were various cue-control signals, this one is 1khz. Early solid-state, build like a brick you know what. It's heavy, about 30lbs, more like 40lbs when it's packed up. Ping off-list if interested. Otherwise, Monday is dumpster day. -- Tom Fine