I work at a TV station that uses a Harris TV30L channel 4 TV transmitter. It has a circulator between the visual driver and PA. It is deeper that the one that you describe, but it uses type N fittings and is in the 70 MHz range.
The connector indicates quality in this case. From the size, I would suspect 150-160 MHz range. Is there a way to retune these to a more useful frequency? 73 Glenn WB4UIV At 06:32 PM 11/28/06, you wrote: >I have what I believe is a circulator/isolator that I would like to >identify. > >It is "big and heavy", meaning it measures 13"W x 4 5/8"H x 1 7/8"D, and >weighs about 15 lbs. > >The label says: "Microwave Associates, a M/A Com company" > Serial: 1009 > Model J-210 > >It has three ports, one marked INPUT another marked OUTPUT and a third on >the "bottom" with the marking obliterated. Next to the unknown port are two >other studs that look like solid ports with the center conductor soldered. >The connectors are "N" type, which leads me to think its UHF maybe... > >Any way of knowing for sure? There was a paper label which has deteriorated >over the years and is now nearly illegible. Looks like is says either 160 >or 460 MHz, the rest is completely unreadable. > >I can provide photos upon request. > >Thanks, >Mark - N9WYS > > > > > > > > > >Yahoo! Groups Links > > >
