[Elecraft] LP-PAN Buffer Modification

[Larry Phipps]

Hi Chris. Just a little clarification. The mod only improves overall 
noise figure of a receiver connected to the IF output of the K3, by 
eliminating about 10dB of loss. It does not improve K3 receiver 
performance. The improvement is most noticeable with the K3 preamp OFF. 
When the K3 preamp is ON, the gain distribution limits the degradation 
of the loss that comes after it to a degree.

73,
Larry N8LP



> ----------------------------------------------------------------------
> Date: Fri, 14 Aug 2009 10:18:57 EDT
> From: W3cmp at aol.com
> Subject: [Elecraft] LP-PAN Buffer Modification
> To: elecraft at mailman.qth.net
> Message-ID: <cdd.56be324f.37b6cc51 at aol.com>
> Content-Type: text/plain; charset="US-ASCII"
>
>  
> Hello:
>  
>      While sniffing around the LP-PAN website _http://www.telepostinc.com/_ 
> (http://www.telepostinc.com/)   I  noticed a mod to the K-3 Buffer Amp that 
> is supposed to improve receiver  performance.  The instruction information 
> states that the mod"is not yet an  approved mod for the K3. Wayne has 
> indicated that it probably will be at some  point."  
>      Can someone tell me if the mod has been approved  or incorporated into 
> production K-3's?  If the mod has been incorporated  into K-3's, what is 
> the starting serial number for incorporation?  
>      Lastly, if someone who has done the mod has made  any before and after 
> measurements on receiver performance, can he or she kindly  publish the 
> results? 
>      Thanks and 73.  Chris Patterson  W3CMP
>
>
>
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