[Elecraft] K2 receiver sensitivity on 12 and 10 Meters

[Don Wilhelm]

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
>