[Elecraft] K3 and phase noise

[Eric Swartz - WA6HHQ, Elecraft]

Here are transmit composite phase noise numbers from the Lab for the K3. 
Needless to say, we are pleased with the results. :-) I've also included 
some numbers from the ARRL reviews for several late model rigs.

Rig     1kHz    2   10   20   50   100   1M
K3      -110  -119 -136 -140 -143 -144  -150
IC7800  -103  -112 -130 -138 -140 -140  -140
FT2000  -102  -105 -128 -129 -128 -128  -128
ORION 2 -121  -129 -126 -125 -118 -128  -138
OMNI 7  -102  -103 -120 -123 -127 -129  -126


Note:
All of the above data reflect the ARRL's latest phase noise lab test set 
up. The K3 was tested on an identical set up which has been correlated 
with the ARRL's. The ARRL changed to this more accurate phase noise test 
set up with the IC7000 Review in May of 2006. (See the sidebar in the 
IC-7000 review, on pg 71, for details covering this change.)

Phase noise results from reviews prior to May 2006 were off by 7.5 dB 
(too optimistic). When comparing new phase noise results to the old 
ones, move upward on the chart 7.5 dB from the old number. (i.e. For an 
old phase noise number of -110 dB, the corrected value is 110-7.5 = 
-102.5 dB.)

The new phase noise plots are easy to spot as they extend to 1 MHz, 
versus the 22 kHz limit of the old ones. All of the above data are from 
the new test method.

73, Eric  WA6HHQ





Alexandr Kobranov wrote:
> Hello all,
>
> I am looking for any relevant info about "phase noise" of K3 - is 
> there any plot or table with any numbers?
> If I missed something somewhere please let me know by individual 
> e-mails and sorry for bandwidth.
>
> 73! es GL
> Lexa, OK1DST
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