Direction finder (Decoy for a Dognapper)

The direction finder was a monitor used to track Scooby-Doo's location during a dognapping case.

Physical appearance
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Season one
Scooby-Doo played decoy as a champion show dog to lure out the local dognapper and find the other stolen dogs. Fred Jones tucked a transmitter into his fancy-looking new dog collar to keep a tab on his location when the dognapper eventually caught him and took Scooby back to his hideout. The transmitter was connected to an antenna mounted on top of the Mystery Machine which was in turned connected to a monitor which showed a technical read-out of where he was. Not knowing Scooby's cover was blown, all they knew was he was being taken to where the was soon to be passing over.

Appearances

 * Scooby-Doo, Where Are You!
 * 105. Decoy for a Dognapper

Notes/trivia

 * The surveillance equipment is too sophisticated to be brought from a store, and even if it could the gang wouldn't likely be able to afford it. Of course there's Daphne Blake's vast wealth (which hadn't been established yet), but she didn't seem to use it at any time for a case no matter how necessary it may have been. Velma Dinkley is supposed to be capable of building sometimes highly advanced inventions, but that wasn't established at this point and was even strongly suggested in Spooky Space Kook, but retconning it may be a possible solution.