Wire Recorder

[Wire recorders?] I got my hands on two very old (tube type) wire recorder/players that say they are "Mohawk Message Repeaters". One works and one doesn't, and my sister fixed the working one. I have no clue how old they are or anything about them, but we have two cartridges for them. They were installed in an elevator and used to play "Please stand clear of the door" when the doors opened. I'm playing with the non-working one to see if I can fix it, it appears as though the amplifier or read head is damaged. The tubes are still good, I already checked that. But I don't have lots of time to spend on it. I should note, though, that the working machine was fixed by my sister, and it's her first piece of obsolete consumer electronic equipment she repaired. (Even if it was a simple belt-swap). I was so proud. ^_^ -------