New 6400 distorted xmit audio

Dennis Cody

New 6400 running 3.1.8 SW.  I have reported distorted xmit audio that almost sounds digitized. This happens  running 1 watt or 1KW, on a dummy load or antenna.   I have a Maestro and with mic connected to it I have the same problem. Thus same problem using computer or Maestro via RJ45 direct to 6400.   I have a friend with a 6400 and his sounds excellent, so we did on the air tests and I set all my xmit settings the same as his and nothing I do with EQ, Processor, or Mic gain changes the distorted audio.  I have tried the Flex provided hand mic which is the worst culprit, and two different studio mics.  None of the changes in Mics change the basic distorted digitized sounding audio.  In other words its not a setting of the radio. Oh and yes Mic bias is OFF.  The problem exists whether I use the Maestro via wifi, plugged into network or plugged directly into the 6400 as mentioned above.  This was to be my finest radio setup yet nothing but constant complaints on the xmit audio.   Hope someone can help or it will be going back to Austin for an exchange or refund after 5 days of shear frustration.   

thanks in advance for your advice. 

k3Tim

[Deleted User]

Do you have any ferrites you can put on mic cable. Possible RF getting in through mic??

Dennis Cody

Yes mic is connected directly to back of 6400.... 

Dennis Cody

Monitor audio is perfect...Good point considering it is prior to processing

Bill -VA3WTB

Dennis Cody

Thanks Bill,  I read that in a post regarding being below 0 so I set all to about minus 8. Needless to say not much fidelity but distorted audio still existed.... I also tried no processing and synthesized audio still exists.  I even out of desperation went back to Ver 2.6 on the software and no change.   Monitor audio sounds great compared to what is received on the air. 

Bill -VA3WTB

I t would be nice to hear your audio, can someone record you and post the audio? They can Audacity to record and save the file.

Bill -VA3WTB

Dennis Cody

Wow. Thanks Bill I will try that. I was using another receiver with no antenna as a monitor. I think it's fixed after finding. Correct combination of eq below zero, Mic gain and processing.

Bill -VA3WTB