With the recent traffic about polar relays, I thought someone might be interested in the following manual. If I did it right the following link will take you to a downloadable copy of TM 11-2513, the manual for polar relay test sets I-193-A, B & C. It is used for the testing and adjusting of 255 type relays. In a quick search, I did not find it anywhere on the web. Hopefully someone will find it useful.

Mike Kley