100-225 Mc concentric line standing wave measurement equipment. 

See pdf page 44 here
https://www.navy-radio.com/manuals/test-94200/dir-test-94200.4.6.pdf

The 1963 directory of USN test equipment is here
https://www.navy-radio.com/manuals/test-94200.4.htm


Nick England K4NYW
www.navy-radio.com


On Wed, Jun 18, 2025 at 10:58 PM Hubert Miller <kargo_cult@msn.com> wrote:

No, not "Off Topic", but USN model OT equipment. What was it ?
-Hue Miller


Sent from my Galaxy

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