Nobody makes 500 Hz IMD dynamic range measurements - they 
are meaningless but that is what it would take to get both 
interfering signals inside the passband of the 2.7 KHz 
roofing filter.   

Sherwood has made some very close in blocking dynamic range 
measurements but I do not know if he has released that data. 
The essence of the private e-mail is that even at 1 KHz the 
limiting factor in the K3 is not blocking but phase noise 
performance of the K3 and/or the interfering signal. 

The final analysis is that key clicks and phase noise from
signals less than 1 KHz way would be more of a problem than 
either IMD or blocking. 

73, 

   ... Joe, W4TV 
  
 

> -----Original Message-----
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of Arie 
> Kleingeld PA3A
> Sent: Wednesday, April 02, 2008 6:45 PM
> To: elecraft@mailman.qth.net
> Subject: [Elecraft] K3: Would not it be nice...
> 
> 
> 
> Would not it be nice... if someone measured the IMD dynamic 
> range of the K3 with the interfering signals placed within 
> the bandwidth of the first IF (roofing) filter? Or has that 
> one already been published somewhere? Or is that impossible 
> to measure?
> 
> Arie PA3A
> 
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