900MHz 33cm Isolator / Circulator Decibel DB4345C TESTED 30dB

Description

This came out of a combiner unit and is a great circulator for the amateur radio band or commercial 900 band.
The unit is rated from 928-960MHz but my tests show that it works in spec from 900-1000MHz without any tuning or modification.
The item was tested with a load termination on port 3
This has a power handling capability of at least 150 watts and likely can go to 200 watts. Insertion loss is a few 10ths of a dB
The isolation is about 30dB and the direction is clockwise.