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Wouxun KG 1000G Modulation problem


lakemen
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Just wondering if I should be contacting "bytwowayradios.com"...???
 
Ben
WRAX296

It is worth the call to see what they have to say, particularly if radio is new.

I have done some experiments on my end and currently learning towards an internally maladjusted AGC circuit in the outbound audio path. Initial audio levels seems good when first transmitting but it includes gross audio clipping (distortion), then the audio drops down to almost nothing and then ramps back up to ‘normal’, but includes some degree of clipping. In my over-the-air experiments with some seasoned operators it has been reported that the problem seems to mostly go away when the mic is held 6-10 inches away from the mouth. This is not generally good in a mobile situation. However, if get acceptable results at this distance, I may modify the mic my mic to pad its audio down so that I can use the mic closer to the mouth to cut down on the background noise.

One local swears he has read some posts overseas about folks reporting this same problem, but while using the KG-UV980 (same electronics as the KG-1000G). Reportedly at least one of them managed to get their hands on some kind of service software package which had allowed them to disable that circuit and that it solved their problem. I have looked far and wide with no luck, so I suspect he may be thinking of a different radio model. In any regards, he promised to try and find the original thread and send me a link. We will see. I will keep you in mind if such software is actually found.


Michael
WRHS965
KE8PLM
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On 12/30/2021 at 7:19 AM, mbrun said:


It is worth the call to see what they have to say, particularly if radio is new.

I have done some experiments on my end and currently learning towards an internally maladjusted AGC circuit in the outbound audio path. Initial audio levels seems good when first transmitting but it includes gross audio clipping (distortion), then the audio drops down to almost nothing and then ramps back up to ‘normal’, but includes some degree of clipping. In my over-the-air experiments with some seasoned operators it has been reported that the problem seems to mostly go away when the mic is held 6-10 inches away from the mouth. This is not generally good in a mobile situation. However, if get acceptable results at this distance, I may modify the mic my mic to pad its audio down so that I can use the mic closer to the mouth to cut down on the background noise.

One local swears he has read some posts overseas about folks reporting this same problem, but while using the KG-UV980 (same electronics as the KG-1000G). Reportedly at least one of them managed to get their hands on some kind of service software package which had allowed them to disable that circuit and that it solved their problem. I have looked far and wide with no luck, so I suspect he may be thinking of a different radio model. In any regards, he promised to try and find the original thread and send me a link. We will see. I will keep you in mind if such software is actually found.


Michael
WRHS965
KE8PLM

 

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I realize this thread is pretty old, but has anyone found a solution to this problem? 

Everyone I know with a KG-1000G has the same audio rollercoaster problem. It starts out loud, ramps down, then back up within seconds. It's really irritating and there seems to be no way to fix it in the settings (nor with multiple returns under warranty). 

For a radio priced like a Yaesu, this thing has been disappointing. Also, the fan sounds like a Vitamix full of ice. 

I could get past its other issues if my audio didn't have this ramp up, down, up problem. 

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I have found a particular issue with this radio.  It seems if you leave the lower channels with high power programmed in memory, the radio will automatically switch to low to be FCC compliant.   The time it takes the radio to automatically switch to low power is the cause of the delayed audio output on transmit.  It seems to affect other channels if left with high power programming in the lower channels.   Once again poor firmware problems.  

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The audio problem is caused by the Automatic Gain Control (AGC) being a bit aggressive.  Everyone I know that has this issue is able to improve it by not holding the mic so close to their mouth and holding it at a slight angle from their mouth (instead of directly in front of their mouth) so they aren't "popping" their Ps and Ts.

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I have found a particular issue with this radio.  It seems if you leave the lower channels with high power programmed in memory, the radio will automatically switch to low to be FCC compliant.   The time it takes the radio to automatically switch to low power is the cause of the delayed audio output on transmit.  It seems to affect other channels if left with high power programming in the lower channels.   Once again poor firmware problems.

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I have found a particular issue with this radio.  It seems if you leave the lower channels with high power programmed in memory, the radio will automatically switch to low to be FCC compliant.   The time it takes the radio to automatically switch to low power is the cause of the delayed audio output on transmit.  It seems to affect other channels if left with high power programming in the lower channels.   Once again poor firmware problems.

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39 minutes ago, StepUp2TheMyke said:

The time it takes the radio to automatically switch to low power is the cause of the delayed audio output on transmit.

This is not the case with any of the radios I've dealt with having the audio issue discussed in this thread.  FYI: posting the same incorrect information multiple times wont make the information any less wrong.

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