[Steve Jackson]

Sorry I hadn’t responded in a while. I did get the original problem resolved. I noticed as we ran off of a second mic/reciever pair that there would be significant noise on the channel connected to the 1st receiver with the transmitter off. Watching the RF display on the reciever, I was seeing significant spikes. All of this is with the transmitter off. So I changed the frequency for that mic/receiver pair and the pop stopped occurring. My assumption is that with the transmitter on, the RF noise at a low level would be overridden by the signal from the transmitter. But the spikes in RF noise would overpower the signal from the transmitter and manifest as a pop.

Interestingly, we have been going along for a while with no problems. But just this past Sunday, we had a few episodes of noise, not really pops. I’m not sure if it was a cell phone causing interfence or something else. It wasn’t the normal cell phone burst that I have heard on other systems. I may encourage the pastor to either remove or shut off his cell phone to see if it reoccurs.

Thanks

[Steve Jackson]

Not real sure about what else is on the circuit but based on location, I don’t think there is much on it. That assumption depends on how logical the original electrician was. We don’t see any other evidence of electrical RF interference on other devices.

I was able to test the mic just sitting on a table for a while before service with no problems. That kind of tells me that it may not be building electrical which I take as good news because we probably couldn’t do much about fixing it.

I am beginning to suspect the mic on the transmitter. Do they often fail this quickly (approx 9-10 months)?

I may try to put him on the 2nd mic to see what happens next week.

Thanks

[Steve Jackson]

Thanks for the response.

He is pretty laid back so there is no gown involved. Usually just normal casual attire.

I believe audio comes back pretty much immediatelly. I have tried to watch the receiver but I haven’t had my eye on it when the pop occurs.

This is a new church in a temporary space. So we setup and teardown each Sunday. So the entire setup isn’t very accessible for testing on off hours.

I like the idea of having the mic set in the general area and see if anything is generated. I’ll try to do that while we setup this Sunday.

I’ll also try to test with the mic off. Much of the time, that channel is muted except when the pastor is talking so I don’t know if it occurs at other times or not.

The idea of static discharge does seem plausible because it is a single pop with no noticeable interference otherwise. On the negative side, this mic has been in use since Nov ’09 in this space and another space and connected to a variety of boards/power amps with no problem. In July, we implemented a new sound system with a Mackie board at another space. I don’t recall the problem at that space but I’m not sure. In August, we returned to the current space. The problem has been pretty regular for the past 3 weeks.

So we have full disclosure, the recievers are rack-mounted in a portable case along with a power conditioner and a 2 channel EQ. Connections to the Mackie are by 10-12’XLR. Distance from the mic to the reciever is maybe 50′ at most.

We do have 2 recievers/mic setups but only 1 is used right now so I may run the pastor on the 2nd setup this week to see if any pops are generated and also bench test the 1st during setup to see what happens.

Since my testing time is so limited, I really appreciate your input so I can maximize my efforts in the right areas. I’ll see what I can come up with this week.

Thanks.