c.cam108

Thanks for the replies everyone. I've ordered an active paddle aerial (could only get one just now so will need to wait to get a second) and will try getting it closer to the stage if possible. I've also picked up an SDR dongle that's been on my wishlist for a while and this has given me an excuse to finally buy. Hopefully I can get a proper look at the spectrum and see what's going on. We're using the Free Solo antenna splitter with the included omni aerials. https://www.thomann.de/gb/the_t.bone_free_solo_antenna_splitter.htm Not sure which frequencies we're on and can't check until Sunday but they're spread quite well across the band. 3x Free Solo twin receivers with the antenna splitter. We've got about 20m from the stage to FoH. Aerials are on 5m cables and we've tried a few different positions away from the rack - higher up, along the wall towards the stage - with some improvement. This did cross my mind. I had a sudden thought last night that we stream on 4G because our broadband is awful, so it could be the proximity of the 4G router. There's also a rats nest of cheap HDMI and SDI distribution just under the table from the mics. Problem is that we can't replicate the issue at any other time other than during Sunday services so we can't try turning stuff off easily! The LTE downlink (mast to phone) is around 790MHz I believe, but the uplink frequencies are in the 830MHz region. Sounds like exactly the same problem as us. Not quite as close, but there are 4 band 20 masts within a mile of us in all directions.

A few months back our church purchased a set of Thomann radio mics in the 823-832MHz band. They work great as long as there is no one in the room! As soon as there are more than a small number of people in the church hall, we get terrible interference that completely overwhelms the audio from the mics. It appears that this is from mobile phones in LTE band 20 (837MHz). Has anyone else come across this and been able to overcome it? Currently we are sitting with £1600 of unusable equipment and Thomann are refusing a return.