[Elecraft] New Elecraft Products

[Bill Tippett]

N2TK:
- Better close in (2KHZ) dynamic range performance.

AA4LR:
For the price, the K2 has one of the best dynamic range figures, even close in.

         K2's IMD degrades 24 dB from 5 kHz to 1 kHz,
primarily due to phase noise.

IMD @ 5 kHz             91 dB (ARRL)
IMD @ 2 kHz     80 dB* (Sherwood)
IMD @ 1 kHz     67 dB* (ARRL)

* = phase noise limited

Sources:
<http://www2.arrl.org/members-only/prodrev/pdf/lab/k2.pdf>http://www2.arrl.org/members-only/prodrev/pdf/lab/k2.pdf 
(graph page 20)
<http://www.sherweng.com/table.html>http://www.sherweng.com/table.html



N2TK:
- Switchable front end filters

AA4LR:
Huh? The K2 is single-conversion. It isn't an up-conversion rig like 
the Orion or the IC-7800, etc. There's no need for a front-end 
roofing filter because the main filter IS the front-end roofing filter.

         But Orion is not an up-conversion rig.  Its
First IF is 9 MHz vs the K2's ~5 MHz.  Up conversion
rigs typically have First IF at VHF (70 or 40 MHz).

"Until the Orion came out, 99% of modern transceivers were up 
conversion radios. (K2 the exception)"  Rob Sherwood

http://www.sherweng.com/Dayton_2004/Dayton_2004-Sherwood.pdf

                                 73,  Bill  W4ZV