[Elecraft] K3s/FT8 Audio Question

[Bob McGraw K4TAX]

You can reduce the LIN OUT level via the Config menu in the radio.   
Normal is 010.  I would back that value down.

I use Windows 10 thus I have full control of all levels via the 
computer.   Also I use the USB connection between the radio and computer 
and do not need a Signalink.

I can't say I agree that RF Gain should always be at maximum, nor do I 
agree that AGC should be OFF.  I know that information in the WSJT-X 
Help file indicated  to turn AGC off.    I know is I've been operating 
my K3S for 3 years now, I use the RF Gain as needed to set the receiver 
for optimum performance based on no signal band noise.    And I run the 
AGC on Fast with a RX BW of 2.7kHz and don't experience any issues from 
strong stations.   I think the key is setting the RF Gain and ATTN to 
values to allow the no signal band noise to be about 10 dB above the 
noise floor of the receiver.

73

Bob, K4TAX

On 10/30/2019 7:24 PM, Richard wrote:
> The Elecraft K3s manual states over and over that the RF gain should always be wide open. I had been running it at about 12 o'clock on FT8 for some time before this was brought to my attention. I supposed that 100% RF gain could possibly show me weak stations I’d not seen before, so I’m trying it.
>
> In order to keep the Audio Input to WSJT FT8 at a reasonable level (nominally 40dB: noise only) with the K3s RF gain wide open I have to run the SignaLink’s RX way down near full CCW. Very touchy and hard to adjust. SignaLink’s JP2  jumper is NOT connected. I do NOT use AGC, nor do I wish to.
>
> Oh, this is a Mac so the USB Audio Codec input has no level adjustment.
>
> Any suggestions as to what I might do to get SignaLink’s RX back to about 12 o’clock where it used to be?
>
> Please reply to FlatHat at comcast.net
>
> Cheers!
>
> Richard Kunc  - W4KBX
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