I've scanned NAVSHIPS 0967-191-7010 for the URT-23 transmitter. This includes Change 2, dated 8 Dec 1969. http://www.navy-radio.com/manuals/urt23-0967-191-7010.pdf If you have a manual for a later version of the URT-23 that I can buy or borrow to scan I'd appreciate it. Cheers, Nick England K4NYW www.navy-radio.com