[Elecraft] Sherwood Receiver Test Data - K3S Added Today

[George Fritkin]

Yes, I saw that -145 truly outstanding. Now, if it could only creat some sun spots and open 10 meters.

73
de
George, W6GF

Sent from my iPad

> On Nov 10, 2015, at 5:10 PM, Wayne Burdick <n6kr at elecraft.com> wrote:
> 
> Bill Breeden <breedenwb at cableone.net> wrote:
> 
>> Rob Sherwood added the K3S to his Receiver Test Data page today.
> 
> 
> Yes. We're pleased to see some excellent test results, including 106 dB of IMDDR3 at 2 kHz for both the 200- and 400-Hz filters. (The K3 came in at 104 dB for the 400-Hz filter. The 107-dB reading is within the usual +/- 1 dB lab/tech repeatability figure.)
> 
> Also worthy of note: sensitivity of -145 dBm for the new Preamp 2 on 10 meters. This preamp is also used on 12 and 6 meters. 
> 
> I checked with Rob, and that blocking dynamic range number (>154 dB) is *not* a typo. He said he saw less than 3 dB phase noise degradation at 100 kHz with +19 dBm fed into the radio, and stopped at that point. I guess there's no point in melting the signal combiner :)
> 
> (By the way, Rob's K3S BDR test level of +19 dBm is exactly 10 dB *higher* than the preamp-OFF ADC clipping level of the 6700. With preamp ON, it would clip at an estimated -11 dBm.)
> 
> 73,
> Wayne
> N6KR
> 
> 
> 
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