[GreenKeys] URA-17 (CV-483) change info FWIW

[Nick England]

The AN/URA-17 and AN/URA-17A AFSK converters were changed from 2550 Hz
center frequency to 2000 Hz center frequency in the 1960s.
I believe the AN/URA-17B already had the change to 2000 Hz center
I know that the AN/URA-17C and AN/URA-17D were 2000 Hz

There was an earlier Field Change that may have been cancelled - it
switched the filters from 2550 to 2000 and called the new unit AN/URA-53. I
have never seen a URA-53.

Changes to the URT-17 manual to cover 2000Hz change, AN/URA-17A,
AN/URA-17B, and AN/URA-53
https://www.navy-radio.com/manuals/ura17-94028-changes.pdf

 I have the following manuals on line
AN/URA-17
https://www.navy-radio.com/manuals/URA17.PDF
AN/URA-17C
https://www.navy-radio.com/manuals/ura17c-man-6810.pdf
AN/URA-17D
https://www.navy-radio.com/manuals/ura17d-0967-438-4010-7205.pdf

Note - URA-17E, -17F, and -17G are completely different units

Nick England K4NYW
www.navy-radio.com
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