Need help identifying an isolator

Have a pair of microwave isolators made from three port ferrite circulators.

They appear to be a "standard" 3/4 inch model with sma female input and output and a 50 ohm load on the third port.

One of the terminations is EMCT brand.

Only consistent marking is #9-228.

Brand and operating frequency?????? Max power??? Dollar Value?????

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Many thanks,

Don Lancaster                          voice phone: (928)428-4073
Synergetics   3860 West First Street   Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml   email: don@tinaja.com

Please visit my GURU\'s LAIR web site at http://www.tinaja.com
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Don Lancaster
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