This is an original WW2 USN Aircraft MD-7/ARC-5 Modulator with Power Supply For ARC-5 Radio Transmitter. It comes with all the tubes and is complete. The ARC-5 radio set was the most popular aircraft radio in the USN and the USMC by the end of the war. It is 11  x 7 x 9 inches and it weighs 19 pounds. This item is being sold as a collectible. Payment should be received within 10 days of auction closing unless prior arrangements have been made. Buyer to pay actual shipping. AZ residents add 6.7% sales tax. Thanks for looking at my auction.