We still had the wire recorders in the P2V-7s. They were hooked up to the Intercom and all VHF/ UHF comms so they recorded all internal and external communications. Don't recall ever having a problem with mine. Ahhh, but that ART 13....you could spend a lifetime tweaking that devil. Thank the god Neptune for the ARC-38 which replaced it. The 38 tuned up both send and receive frequencies, tuned the antenna, then shined your shoes, all in a few seconds. END