[Elecraft] K3: Sherwood Receiver Test Data question

[Joe Moffatt]

I can't speak to what the old was like.   I just got my K3 built a few days ago and it is brand new with the new board.

I had a Flex-5000a and a 6300 I have access too.   I am an avid DXer with very marginal antennas.   Last night in the CWT, I hit my highest rate ever and I am blown away with this receiver.   The sound and feel is incredible.   I have never had a radio this good.  It is hard to.describe, but it is amazing.

73 to all,

Joe


-------- Original message --------
From: Wayne Burdick <n6kr at elecraft.com>
Date: 03/04/2015 11:46 PM (GMT-06:00)
To: RLVZ at aol.com
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3: Sherwood Receiver Test Data question

Dick,

The "sensitivity" number is incorrect because the K3 Rob tested didn't have its S-meter and AGC calibrated. He's going to re-test this after the unit is calibrated. We tested a few K3s with new synths in our lab, and all of them had sensitivity very close to the first K3 Rob tested.

On the contrary, the new synth reduces noise considerably over the old (as much as 20 dB lower noise at a 2-kHz offset), which only benefit all measurements.

73,
Wayne
N6KR


On Mar 4, 2015, at 8:56 PM, Dick via Elecraft <elecraft at mailman.qth.net><mailto:elecraft at mailman.qth.net>> wrote:

>
> Please advise if I am reading the new Sherwood receiver data correctly:
>
> 1) it shows a nice 6-8dB improvement in 3rd order dynamic range after
> adding the new synthesizer?
>
> 2) it shows that the K3's sensitivity has been greatly reduced from the
> original 0.33 & 0.19 to 0.8 & 0.5 after the addition of the new synthesizer?
> If this is true, this would be bad news for weak signal 6 & 10-m.
> reception.
>
> 73,
> Dick- K9OM
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