[Elecraft] IF shift

[Geoffrey Mackenzie-Kennedy]

Bob,

With due respect to Ron, IF Shift is very easy to design into a single 
conversion receiver with a selective IF filter *provided* that the IF to 
Audio detector is some form of mixer with BFO injection, such as a product 
detector. It would probably be difficult to implement in the K2 not because 
of the required circuits, which are already there, but because of the 
firmware changes and related alignment problems. Also the control needs to 
be manual on the front panel, not via some menu.

73,
Geoff
GM4ESD



----- Original Message ----- 
From: "Bob Tellefsen" <n6wg at comcast.net>
To: "Ron D'Eau Claire" <rondec at easystreet.com>; "'Jeff Kinzli'" 
<kinzli at kinzlicoils.com>; <elecraft at mailman.qth.net>
Sent: Thursday, February 08, 2007 4:40 PM
Subject: Re: [Elecraft] IF shift


> Hi Ron
>
> "One of the strengths of the K2 is its single-conversion design. That is, 
> in
> part, responsible for the extremely good specifications the receiver 
> enjoys.
> However, i.f. shift such as other rigs often feature require a
> multiple-conversion design with all the issues that come with additional
> mixers, oscillators and complexity. "
>
> Well, I'm not sure this is totally true.  Before I got my first K2, I used 
> a
> Kenwood TS-180S which had a very nice IF shift feature.  It was also a
> single conversion radio, with an IF of about 8.3 MHz.  I loaned the manual
> to Eric and Wayne so they could see how it was done.
>
> Sure wish there was a way to implement it in the K2.
> 73, Bob N6WG
> The Little Station with Attitude