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Lectrosonics 411a/um400a very random bubbly soft popping


Scotty What

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Hi all,

I just miced up someone today with the above system and very random, without a mic plugged in, I hear a very random popping. Almost like a cable popping but softer and not scratchy. The system work perfect the last time I used it. My experience with troubleshooting wireless is not much. So any help would be great. I swapped batts, antenna and jiggled it violently with no specific result. Very random and not caused by vibration.

Thanks for your suggestions.

Scott

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Hi Scott,

Put the transmitter into the refrigerator for 10 minutes and then, while the 5 pin is still cool, exhale into the connector. See if this replicates the problem. If so, the jack needs to be cleaned with alchohol.

Best,

Larry F

Lectro

I plugged in the mic and wore it myself for about 20 min last night with no issue replication. Maybe it dried out or whatever. I guess I'll just keep working it.

Thanks for all your ideas.

Scott

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Thanks for the info Larry. I plugged it in for the first time today an immediately heard the issue. I have phones on now and it's doing it. It sounds like the microwave popcorn when it's almost done. I alcohol swab the connector and that didn't fix it. It will act up just sitting on the counter.

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Do you have a second transmitter on the same frequency you can test to make sure it is indeed the transmitter that is noisy?

LEF

Thanks for the info Larry. I plugged it in for the first time today an immediately heard the issue. I have phones on now and it's doing it. It sounds like the microwave popcorn when it's almost done. I alcohol swab the connector and that didn't fix it. It will act up just sitting on the counter.

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I do. I'll test tonight and report. I managed to get another for the rest of the shoot... Thank you Charlie Tamaras if I need to have it repaired, should I send it to LSC in LA or send it to Lectrosonics? I will prolly send the two that I have and service them both at the same time.

Thanks so much for all your help.

Scott

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Lectro loves Location Sound but on weird things, mother (ship) knows best.

Best,

Larry F

Lectro

I do. I'll test tonight and report. I managed to get another for the rest of the shoot... Thank you Charlie Tamaras if I need to have it repaired, should I send it to LSC in LA or send it to Lectrosonics? I will prolly send the two that I have and service them both at the same time.

Thanks so much for all your help.

Scott

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Thanks all. Here is my current test sinario, (the original issue was with um400a and 411a pluged into ch2 of 788t powered by np1/psc distro) ...I ran a ucr211/um200 all day today with no issues. So it doesn't seem to be the channel. Right now ive been listening to a um400a on the 411a (the issue sys) on ch2 ....with no issues for about 40 min. Prior to this I plugged in to ch8 with a um400 (dif tx) and 411a (issue sys) and had no issues for about 20 min. ....did I get a visit from the "fixit fairy" and made it all better?

I'll make throught the show and keep testing. Then I'll look to be sending both my systems in for a check up.

Rrrrrrrrrrrrr....Scott

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