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Noise with Countryman B6 and Lectro SMWB


syncsound

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18 hours ago, syncsound said:

Getting some high pitched noise (assuming it's RF) with Countryman B6s and the SMWB. Happened on 2 different B6s,  never with COS-11s or OST mics. Anyone else run into this?

In the 5 pin female connector (TA5F), make sure pin 4 is not connected to anything. The B6 requires 2 Volts for bias which is set by leaving pin 4 unconnected.

Best Regards,

Larry Fisher

 

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On 8/24/2018 at 9:10 AM, LarryF said:

In the 5 pin female connector (TA5F), make sure pin 4 is not connected to anything. The B6 requires 2 Volts for bias which is set by leaving pin 4 unconnected.

Best Regards,

Larry Fisher

 

These B6s worked fine with both SMQVs and SMs. Would a wiring error only introduce noise with the SMWBs?

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10 hours ago, syncsound said:

These B6s worked fine with both SMQVs and SMs. Would a wiring error only introduce noise with the SMWBs?

No. The input circuits are the same. Does the noise vary with the position, near or far, of the antenna and the B6 cable?

LEF

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9 hours ago, LarryF said:

No. The input circuits are the same. Does the noise vary with the position, near or far, of the antenna and the B6 cable?

LEF

 

Will experiment, but given the wardrobe, we have few cable/antenna placement options.

 

 

On 8/24/2018 at 9:10 AM, LarryF said:

In the 5 pin female connector (TA5F), make sure pin 4 is not connected to anything. The B6 requires 2 Volts for bias which is set by leaving pin 4 unconnected.

Best Regards,

Larry Fisher

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12 hours ago, syncsound said:

Same noise, regardless of wire/antenna position.

The only things I can think of now it to try somebody else's B6's and SMWB because everything else has been substituted or tried. You might also try calling service at Lectro (800) 821-1121 and see if they know of a similar occurrence. Renee and Dean have talked to a lot of users with weird problems over many years.

Best Regards,

Larry Fisher

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How is the B6 microphone wired?

We have noted that the figure 1 information from our mic wiring page does indeed cause the noise you have reported.

https://www.lectrosonics.com/Support/Microphone-Wiring/uhf-transmitter-5-pin-input-jack-wiring.html

 

Suggest using the wiring from Countryman's site as shown in the pic below...

 

Please let us know if this wiring cures the high pitched noise.

servo wiring for E6 B6.gif

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  • 2 years later...
On 8/29/2018 at 1:48 PM, LarryF said:

The only things I can think of now it to try somebody else's B6's and SMWB because everything else has been substituted or tried. You might also try calling service at Lectro (800) 821-1121 and see if they know of a similar occurrence. Renee and Dean have talked to a lot of users with weird problems over many years.

Best Regards,

Larry Fisher

Hi, I have extra high pitches noise starts from 2750 Hz on SMWB with DPA4061/60, any advices? This number to Renee na Dean - what Country is it? US?

thanks! best, IYS

Screenshot 2021-02-12 at 13.33.18.png

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2 hours ago, Boomboom said:

I just read somewhere you got to disable the Remote function in the tx menu... looks like they spotted the issue and I assume they're working on it (?)

The Remote function is turned off, unfortunately...

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