Help With Identification of Phone System or Antenna System Parts at Police Department

[Tom Blevins]

Here are the Pictures I took does anyone know what these are and if we have to have them?
There are 2 different ones on has two cylinders the other has four cylinders.

[Chris Weiss]

could it be a radio antenna of some sort?

[Keith Rogers]

My radio guru friend says RF Cavity Filters

On Tue, Feb 17, 2015 at 12:13 PM, Tom Blevins <topazc...@gmail.com> wrote:

Here are the Pictures I took does anyone know what these are and if we have to have them?
There are 2 different ones on has two cylinders the other has four cylinders.

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[Hroller McKnutt]

Those are duplexers... they keep the transmitter from swamping the receiver and blowing up the front end of it... are these active in the police departments repeater? Generally speaking if you have to ask you shouldn't be touching those things.

Not to sound like an ass, but those are kind of important to a repeater system and if this is an active system you could easily wreck it by poking around in it. (For my bona-fides, I'm an Extra class amateur radio operator, if you need assistance with radio questions and I don't know the answer I can put you in touch with someone who does)

Mike

WY0M

On Tue, Feb 17, 2015 at 12:13 PM, Tom Blevins <topazc...@gmail.com> wrote:

Here are the Pictures I took does anyone know what these are and if we have to have them?
There are 2 different ones on has two cylinders the other has four cylinders.

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[Ben West]

Echoing Hroller's comment that they do appear to be in use in the photos shared.  They have coax attached, and one photo shows the heatsink on the rear of a rackmount transmitter/exciter thingy.  If they're highly specific to the police frequencies being used, guessing such gear wouldn't be useful to anyone lacking the appropriate FCC permission.

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Ben West

m...@benwest.name

[Hroller McKnutt]

Transmitter/Exciter thingy is a technical term btw. ;)

Mike

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[Tom Blevins]

I didn't touch. I only took pictures and will leave alone.

[Hroller McKnutt]

Good to know. ;) I hadn't realized how stressed I was at work today until I saw this reply just now, my apologies for the harshness of my earlier message.

Mike

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