[Elecraft] K2 KPA100 LP filter question

Don Wilhelm w3fpr at embarqmail.com
Tue Feb 23 15:49:34 EST 2010


LS,

Yes, the KPA100 low pass filter for the selected band is in the circuit 
at all times if the KPA100 is connected to the K2.  The KPA100 circuits 
required to change bands, etc are powered from the base K2 through the 
ribbon cable (the 12CTRL line).
The KPA100 T/R switch circuits are bypassed when operating low power, 
but the LPF and wattmeter are in-line.

73,
Don W3FPR

lstavenhagen wrote:
> Hi all,
>
> I was looking through the schematic for the KPA100 and it looks like the LP
> filters in the amp remain in the RF path during receive. Is this the case?
> If so do they provide extra LP filtering on RX?
>
> Just sitting here with my finger poised over "add to cart" on the KPA100 kit
> and was just wondering about that.
>
> Thanks es 73,
> LS
>   
>   


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