[Elecraft] Rob Sherwood's K3 test data -- quick summary

[wayne burdick]

Rob Sherwood, NC0B, an independent and well-known receiver performance 
specialist, has completed his K3 receiver tests. We're pleased with the 
results, which will place the K3 at the top of his comparison chart.

Rob will be updating his web site in a few days. For now, I'll just 
mention a couple of his numbers (with his permission).

Elecraft K3, S/N 00149, 20 meters, preamp off:       

   Dynamic Range 20 kHz          104 dB
   Dynamic Range 5 kHz           102 
   Dynamic Range 2 kHz           101*

* with 200 Hz 5-pole filter

   Blocking above noise floor at 100 kHz spacing, AGC On:  140 dB
   Phase noise (normalized) at 10 kHz spacing:  138 dBc/Hz

Rob performs some tests differently that we (and the ARRL) do, but in 
general we're all in close agreement. Note that the unit under test had 
only Elecraft 5-pole filters. Our tests show the 8-pole filters to be 
as good or better, and we sent some of them to Rob to test when he gets 
a chance.

73,
Wayne
N6KR


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