Receiving radio frequency?

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plavin

New Member
Hi everyone,
I was playing at a country club last night and had a weird thing happen. I am a pianist and disc jockey. Last night I was playing keyboard during dinner, so I had my kb into a direct box. I then ran a mic cable from the direct box to the mic input on my rane DJ mixer. The kb signal was going through, but I was also receiving a radio broadcast(quite clearly) as well. I tried a different mic cable, but still same problem. Has anyone ever run in to this type of problem and have any suggestions to correct. I ran different unbalanced cables in to the aux input of the mixer, so everything was Ok, but had to move closer to the mixer. Thanks for your help.

Happy New Year!

Paul
 

firstclassdj

New Member
What was the length of the cable? Was it shielded? Did you happen to hear any identification (station id) of the broadcast, or know of any AM/FM stations close by? I take it no wireless gear was involved and this was interference into a direct cable connection....

I'm curious to know more as well.

- Matt
 

Trevor G

New Member
I DJ on several charter and dinner cruise boats and have encountered the same problem a few times. It always seems to happen right around the same location on the water. I can clearly hear the station and it's ID, and it is a powerful local station. My only guess is that we must be passing near their antenna.

The first time it happened I was using a 15 ft. mic cable that came free with the microphone, and someone here pointed out that those free cables are not always that great and suggested using a better, and shorter cable since I was using the mic right at my table. I purchased a good quality 3 ft. cable and still seem to encounter the same interference.

It does not come through my cordless mic, only the corded mic, and it occurs whether the switch on the mic is on or off. When I disconnect the mic cable it goes away.

Sorry I don't have an answer for you, but I just thought I'd share my similar experience.
 

rk_productions

New Member
We've managed to tune in a country station a few times, no idea why or how or why it only does it occassionaly as we play in the same place often. Good topic!
 

bill_smith

MobileBeat Moderator
Staff member
When you disconnected the Mic from the system, did the broadcast stop, or continue?

In Trevors case, the noise went away. This in itself indicates that perhaps the shielding on mic cables isnt of a sufficient quality to prevent the pickup of stray emissions.

That's actually very important, as it validates that the rest of your system is well shielded.

Perhaps a switch to a UHF wireless would solve the trick.

I used to get this a lot on VHF freqs, never has happened on UHF.
 

plavin

New Member
Hi Matt,
Thanks for your reply. It was a 25 ft whirlwind cable. I am assuming that a mic cable is balanced so it is shielded better than an unbalanced cable, but that might not be the case.

Paul
 

plavin

New Member
Hi Bill,
Yes, the interference stopped as soon as I unplugged the mic cord from the mixer. I was only using the mic cord to connect thr keyboard into my system. My UHF wireless mic had no problems whatsoever. I guess I could consider using a wireless guitar system to connect as well. Great idea and thanks for your reply.

Paul
 
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