[Elecraft] K3 APF FINE Tuning

[wb6rse1 at mac.com]

Ron - I'm referring to tuning the RX to hit the peak of the APF, not the APF. The ability to do it .001 with FINE tuning (or .05 in the next release TBD) allowed me to tune to a peak a very weak 9UØA on 80m that was much more difficult and less effective with the tuning at .01. Especially when the target is on for very short transmissions. In-other-words, real world experience.

73 - Steve WB6RSE


On Nov 3, 2010, at 7:59 PM, Ron D'Eau Claire wrote:

I'm not clear on the value of changing the APF center frequency
independently of the actual signal center frequency. If the other station
drifts off-frequency, I just tune him back in with the RIT or, since I use
SPLIT as my basic operating mode, with the VFO knob. 

In what circumstances if tuning the APF frequency useful? 

Ron 

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Wayne Burdick
Sent: Wednesday, November 03, 2010 7:01 PM
To: wb6rse1 at mac.com
Cc: Elecraft Reflector
Subject: Re: [Elecraft] K3 APF FINE Tuning

Yes, you can fine-tune (1 Hz) using either the VFO or RIT.

In addition, it looks like the next release may provide 5-Hz  
increments for tuning the APF center frequency (presently 10). We're  
testing that now.

73,
Wayne
N6KR

On Nov 3, 2010, at 6:30 PM, wb6rse1 at mac.com wrote:

> Elecraft continues to delight.
> 
> FINE tuning ON can be very helpful on really really weak signals  
> with the APF.