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com over CAT5... update
Keith Broughton:
So I made an interface box to connect Clearcom to FOH using the CAT5 cable config as discussed a few months back.
Worked in the shop but once the cable was laid out on a show, there was noise picked up.
As it turns out, the CAT5 is not STP... :(
Replaced the CAT with mic cables and com was quiet so I can only associate the noise with the lack of shield on the CAT.
Tim McCulloch:
--- Quote from: Keith Broughton on September 10, 2015, 03:15:56 PM ---So I made an interface box to connect Clearcom to FOH using the CAT5 cable config as discussed a few months back.
Worked in the shop but once the cable was laid out on a show, there was noise picked up.
As it turns out, the CAT5 is not STP... :(
Replaced the CAT with mic cables and com was quiet so I can only associate the noise with the lack of shield on the CAT.
--- End quote ---
Clear-Com is also unbalanced - no CMR.
Perhaps Pete or Mac can comment on use of CATx cables and party line intercoms.
Keith Broughton:
--- Quote from: Tim McCulloch on September 10, 2015, 04:22:33 PM ---Clear-Com is also unbalanced - no CMR.
Perhaps Pete or Mac can comment on use of CATx cables and party line intercoms.
--- End quote ---
Yep... no CMR.
Knew that from the start and suspected it might be a problem but gave it a try anyway.
Fail :-[
brian maddox:
--- Quote from: Keith Broughton on September 10, 2015, 06:05:51 PM ---Yep... no CMR.
Knew that from the start and suspected it might be a problem but gave it a try anyway.
Fail :-[
--- End quote ---
Yeah, clearcom will buzz when everything is perfect. Good luck with no shield... 😀
The old Telex balanced Comms would work over Cat5. But that's largely a dead forrmat at this point.
You could of course convert to four wire and then cat5 is not only acceptable, it's a viable option. But I digress.
Mac Kerr:
--- Quote from: brian maddox on September 10, 2015, 11:00:05 PM ---Yeah, cclearcom will buzz when everything is perfect. Good luck with no shield... 😀
The old Telex balanced Comms would work over Cat5. But that's largely a dead forrmat at this point.
You could of course convert to four wore and then cat5 is not on.y acceptable, it's optional. But I digress.
--- End quote ---
You could also put dry out boxes at each end of the run, but you would have to power each end separately.
Here's a LINK to Pete Erskine's download page of a dry out box. Connect the balanced sides together with a Cat5 cable, making sure pins 2&3 are on the same pair, and you're good to go. As I said, this does require power at both ends.
Mac
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