[Elecraft] Elecraft K2 Temperature-Compensated PLL Reference Upgrade

[Eric Swartz WA6HHQ - Elecraft]

We've just completed field testing of an easy-to-install upgrade to the K2's 
PLL synthesizer stage. The upgrade uses a thermistor and a few other 
components to temperature-compensate the varactor-tuned crystal reference 
oscillator. The compensation circuit reduces the reference oscillator's 
temperature coefficient by as much as a factor of 10. This will be of 
particular interest to those who use the K2 with the KPA100 option, or who 
frequently operate outdoors or mobile.

All of the components are mounted on a small circuit board which replaces one 
of the existing resistor networks. This results in a clean, no-wires 
installation. The changes do not increase current drain.

The PLL upgrade will be included free of charge with all new K2 kits starting
today (s/n 3446 and up). Existing K2 owners can purchase the upgrade kit for
only $19 (order number E850138). The upgrade kits are now in stock.

You can get more information at:
http://www.elecraft.com/order_form_parts.htm#K2%20Parts


We'd like to thank John Grebenkemper, KI6WX, who designed the 
temperature-compensation circuit, as well as all of those who field-tested the
upgrade kit.

73,
Wayne, N6KR
Eric, WA6HHQ



http://www.elecraft.com/order_form_parts.htm#K2%20Parts