[Elecraft] Filters for K3

[Al Lorona]

> Al,

> As has been pointed out - the K3 does it a bit differently because you can control both the width and the shift.

> 73,
> Don W3FPR

Hi, Don!

Right, this is what I've been trying to say, but saying it poorly, apparently!

K3's SHIFT and WIDTH controls, being separate controls, do *not* do what I have been calling "IF shift" as implemented in old radios.

That being the case, if what one wants is the old-style IF shift, or for example to use the controls as Dave AB7E described, one has to adjust two controls. In the heat of battle, you may find it advantageous to have a single control do both. That's all I'm saying.

Here is a possible macro to emulate the old-style IF shift:

SHIFTDN  = BW0200;IS 1000;
or
SHIFTUP  = BW0190;IS 1550;

This will narrow the bandwidth and do the shift, much like the old-style IF shift. These macros could be useful in a contest situation where you need to immediately change the passband to eliminate QRM while copying an exchange. The undo of these macros is something like:

UNSHIFT  = BW0240;IS 9999;

Regards,

Al  W6LX