[Elecraft] K3--Too much ALC creates energy on opposite sideband?

[Barry]

Wes,
     You make a very good point. The unwanted sideband will not be 0; 
there will be some "residue" that can be heard if the signal is strong 
enough. And, a lot has to do with the measurement method at the 
receiver.

     Years ago, I was running DSBSC using a Globe DSB-100. I was told 
that my carrier was way down but my unwanted sideband was only 20 db 
down. That was interesting as I made no effort to suppress my unwanted 
sideband. The problem was the method that was used to make the 
measurements and the strength of my signal. So, determining the ratio of 
the two sidebands might be difficult, but it may be the correct 
approach, However, it will require being able to "see" both sidebands on 
an equal basis.

73,
Barry
K3NDM

------ Original Message ------
From: "Wes" <wes_n7ws at triconet.org>
To: elecraft at mailman.qth.net
Sent: 8/28/2019 1:45:11 PM
Subject: Re: [Elecraft] K3--Too much ALC creates energy on opposite 
sideband?

>Although the manual doesn't say so, according to an ARRL review, the K3S is specified to have undesired sideband suppression of >50 dB.  ARRL claims an optimistic >70 dB.
>
>So if you are extremely strong at the other guy's place, he might easily hear an opposite sideband, even though your radio is operating correctly.  Ask him what the ratio is.
>
>Wes  N7WS
>
>On 8/28/2019 9:40 AM, Nate Bargmann wrote:
>>I received a note this morning advising that I should check my ALC as he
>>is seeing some energy on USB when I check into a 75m voice net on LSB.
>>I am using an MC-50 microphone and am running the mic gain at 35 and the
>>compression at 11.  My thinking was that generating opposite sideband
>>energy would be quite difficult with the K3's DSP.  Am I wrong?
>>
>>I'll try working with him some morning and back down the mic gain a bit
>>and see what that does for him.
>>
>>73, Nate, N0NB
>>
>
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