Matt and all,
While that is good info, be aware that the referenced application note
which suggests reducing the value of Control Board R1 is applicable only
to K2s below SN 3000.
There is a pot at R1 for the AGC Threshold level on all K2s SN 3000 and
above.
You can adjust the AGC Threshold lower than the suggested 3.8 volts, but
as you lower it, the values for CAL S LO and CAL S HI become more and
more erratic. I suggest keeping the voltage at CB U2 pin 5 to 6.5 volts
or higher - a minimum of 2.7 volts is normally sufficient.
73,
Don W3FPR
On 11/6/2014 12:31 PM, Matt VK2RQ wrote:
There is an application note on the Elecraft website dealing with increasing
the K2 sensitivity, although as the article mentions, there are trade offs:
http://www.elecraft.com/Apps/RX_Gain_application_note.htm
73,
Matt VK2RQ
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