Gary,
Thank you very much for this information - I will give it a try. This
forum is a joy as is the K3.
73 Doug EI2CN
On Thu, 12 Nov 2009 08:17:27 -0500, "Steve Ellington" <n...@carolina.rr.com>
wrote:
> Gary: RE: Preamp ON
>
> I agree with your comment on the preamp even though it runs against common
> knowledge. Even on 160m where the noise level is S9, sometimes I can bring
> out a weak cw signal by using the preamp and with AGC settings similar to
> yours. I know it doesn't make sense and I can't explain it but it works.
>
> Steve
> N4LQ
> n...@carolina.rr.com
> ----- Original Message -----
> From: "Gary NL7Y" <pea...@gci.net>
> To: <elecraft@mailman.qth.net>
> Sent: Thursday, November 12, 2009 2:51 AM
> Subject: Re: [Elecraft] [K3] K3: CW weak signal
>
>
>>
>> Low band DX from Interior Alaska are always a work in progress. Ignore
> the
>> howling and instead listen for the signal. It's not a wolf at the door.
>> Try
>> this for weak DX:
>>
>> 200Hz filter (or the narrowest you have)
>> 6-8db filter gain (weigh S/N vs signal strength - I set mine at 8db gain
>> for
>> weak, lower for stronger)
>> BW 100-0.50 Hz (any wider is worse for weak signals for me)
>> Pre-Amp on (it does help and does not distort the signal)
>> NB as required (I need DSP 2-7, IF Med-7, = 2S units lower city noise)
>> AGC Threshold 006 for weak signals, 005 for stronger signals if AGC on
>> AGC Slope 000, 005 for stronger signals if AGC on
>> Also try AGC Off and ride the RF gain for best signal
>> Adjust audio gain for minimum noise/best signal
>>
>> You truly haven't experienced the unique abilities of the K3 until you
>> work
>> Low Band DX in, or just out of the the noise floor, compared with other
>> radios. It's an amazing piece of radio gear.
>>
>> 73 Gary NL7Y
>>
>>
>>
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>>
>> --
>> View this message in context:
>> http://n2.nabble.com/K3-CW-weak-signal-tp3981344p3991230.html
>> Sent from the [K3] mailing list archive at Nabble.com.
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