anacondaq

Hi again, i had a thought. Could the whine issue and the distortion be correlated? My brand new packs are perfect, and the I have sent 3 packs with the whine in for service, and another 2 that are very noisy. They have not heard of either of the issues but hopefully they can figure it out. Ben

Also, The whine issue has never been a problem when im using DPA 4061's and the packs are in waist straps, It is still there but only audible in headphones. But when i use DPA 4099 on them on say softer instruments like cello, double bass or acoustic guitar the whine issue packs are quite bad. This is due to the lower output of the 4099, and the 4099's are much nosier or their own as well. They are fine on the packs without this issue. I have one that whines particularly worse than the other two as well. Ben

Hi Don, are these resistors apart of the RF Board? Is there a service centre in Australia at all? Thanks Ben

Also, i have ended up with 3 belt packs that produce the 'whine' mentioned earlier in this thread, is replacing the antenna board in the packs enough to solve this issue? thanks Ben

Hi Guys, Im just chiming in again after a few more shows running these units. Last show i eliminated a wireless DMX unit that was seriously flooding the 2.4ghz spectrum with information on all channels, and i only had a few sound checks where this bizzare distortion presented itself and it was not as pronounced as it has been in the past. I never noticed it during the course of a show. Switching channels on the belt pack that had the issue did not stop the problem. I notice this as a problem when there are many people on stage, ie when a performer is sound checking just before or whilst vocal warm up is taking place on stage. As usual it becomes more pronounced with a greater input into the mic, and nothing in the chain is anywhere close to clipping. I have a scanner that i use for UHF radio mic's as well as 2.4ghz, and i plugged in all of the line 6 frequencies for each of the 12 RF 1 channels (4 for each channel) and used the best 9 of these. Being able to see the 4 frequencies signal levels made channel selection a lot easier and safer. Is Intermodulation a consideration for these systems? I always presumed that it was not as the set channels are intended to work with one another. The error correction theory sounds plausible, and i guess if this were the case the only way to test this is if there were an option to bypass it however i imagine that it is an integral part of the system and this would not be possible. The only way i see to improve this is more control of the RF environment, and more 'headroom' for the receivers. Perhaps an RF Venue 2.4ghz CP Beam would help, i currently use 2 p180 antennae. I often have my line 6 rack right beside Sennheiser G3 units, all are using remote antenna's that are correctly spaced, close to a minimum of 1 meter. Could having the receivers next to one another have any adverse effect? Thanks Ben

On a side note, you can get that whine from the mic lead or element being to close to the pack, do you bunch your lead up in the pouch with the pack? I have a scanner that I use for UHF transmitters, it also does 2.4ghz so I will be employing this next week.

I am unable to replicate the issue with 8 packs running, perhaps it is a by product of a busy rf environment? Ben

Those examples sound very much the same as what i have experienced, thanks for posting Daniel. Despite being MP3 and a performer rather than a test tone, the issue we are hearing is plain as day. You can hear how it changes as the vocalist changes dynamic, its almost like some sort of clipping somewhere? We know the pacs have more than enough headroom, and generally the AF out indicators on the receivers only register 2 bars or so at a loud volume, and also it is heard quite clearly at a very reasonable level that should not cause distortion when the receivers output are set at 0db. Also the capsules overloading is ruled out in those examples, and my experience with the issue has occurred with school students "half singing" on DPA 4066's. I use dpa 4061 or 4066 and have experienced this problem. latest firmware on everything as well tcc i have not experienced the whine issue, i have experienced a substantial increase in noise on some packs with countryman B3's and Rode HS1's (on 2 of my 10 transmitters only), but with the DPA's the noise is not present at all. Many of mine are second hand, hence the combination of transmitter packs. Not that it makes any difference if not using the eq settings etc. I shall test my units thoroughly and report back. Ben

Furthermore, when this issue presented itself in theatre during sound check I swapped microphones, transmitters and channels with no avail. But not receivers, but as mentioned earlier the issue wasn't present for 2 days prior to this.

Or if this is an artifact of RF1 mode i can clear frequencies and use RF2 mode? Are audience mobile phones a consideration for interference in RF2 mode? there is no wap in the theatre.

Hi Don, all are v75 recievers and a mixture of v55, G90 and V75 packs running in RF1 mode. In the same venue each time, they were running directly over top of a W-DMX and another cheavet wireless DMX for this show and i had no time to make proper space for the Line 6 packs, ie recievers were glowing red when the packs were off :/ not ideal!. They never dropped out, and for 2 rehearsal and 1 show there were no issues at all and then for the other 2 shows i noticed it once for only 1 bar of singing during the show and then in the sound check of another. I have paddles, but have experienced the same issue before i have had paddles. It would be nice if it were just interference as i have a scanner and can ensure they are free of interference and i will be adjusting the settings on the w-dmx unit to work around the line 6 packs next show. Could interference cause this audible disruption? I will do thorough testing tomorrow of all units. Thanks Ben

Hi, I have experienced a similar issue i believe as well. the distortion is not apparent until the input reaches a certain volume, and when testing all of the packs one by one they all seem fine, and due to this it only becomes apparent really during a show in quieter sections, not when apart of a chorus. I have not tested them with all of them running at once as yet but i will do this ASAP this week and determine wether it is a certain pack etc. It is definitely not digital distortion, as this would be far more aggressive, the fuzz or buzz for me is generally softer than the singer and becomes louder and more pronounced as the singer sings louder. And therefore when a show becomes more sparse in its content on a good speaker system the distortion is apparent. Has this issue been resolved for you as yet? is it an issue with a pack? thanks Ben

No the noise floor is as any other pack with a mic unplugged and the noise remains with multiple receiver's. Weirdly, as i mentioned, it doesnt happen with the DPA mics, but does with the rode and countryman mics plugged in.

Not dirty pins or dry solder on the connector, any other suggestions? Service in AUS would likely cost the price of a whole new belt pack :/

Hi guys, i have a beltpack that is producing a lot of noise when a mic is plugged in. When a countryman B3 is in theres alot of noise, when i plug in a Rode HS1 there is slightly less noise and when i plug in a DPA there is no noise at all. All 3 work perfectly on another TPB12, Any thoughts? Could it be a dry solder in one of the connectors in the beltpack or something along those lines? Thanks Ben