Hi JWsoundgroup
A freelancer of ours recently had a gig recording a panel discussion with 4 people. MCR54 with betso bowties into 833, 2x MTP40s and 2xMTP41s operating in the 650mHz range.
One of the transmitters started sounding worse over time. At first, there was slight saturation when talent got loud, after an hour, the signal was all but unusable. Bodypack was mounted
on pants at the back, talent wasn't sweaty and the antenna didn't touch the skin directly. MCR54 showed good reception throughout the entire ordeal. After the shoot, said freelancer
replaced the mic to see if the mic was faulty. But he got the same distorty sound on the other lav as well. The next day, he let the transmitter run for an hour, but it sounded fine.
Setting on the MTP41s was 2wires+bias, gain set the same for the entire shoot.
So... any ideas what might be wrong here? I cut out some files from the recording..
At the beginning after 20mins:
18min.mp3
After 40 mins:
40min.mp3
After 50 mins:
51min.mp3
After 60 mins:
60min.mp3
I suspect the battery being bad and influencing the bias power on the transmitter. I'll test thoroughly, but i'm wondering if i should have the TX checked by Wisycom.
I'd love to hear some veteran's opinion on this, maybe you instantly recognize the sound.
Best and happy recording
Martin