Good advice from N1EU and K2AV here, folks!
Also, see Wayne's posting: "Tips for using APF."
I'm a junkie for trying out new firmware, and I can attest that the APF
is as good
as it ever was-- in fact you need the latest version of it to be sure
you have the
5 Hz resolution in the APF shift control. Other pre-requisites for
success with APF
are using FINE tune (1 Hz frequency resolution) and also shifting the
signal frequency
(using RIT and APF shift) ) slightly off the ringing frequency.
73,
Chuck Guenther NI0C
K3 s/n 1061
Barry, N1EU wrote:
"
Forget it - full stop!
I just ran a spectral analysis of the current firmware versus the very first
APF implementation (mcu 4.17 dsp 2.65) from 11/3/10 AND THE PLOTS ARE
ABSOLUTELY CONGRUOUS! The APF implementation hasn't changed a bit (or a
byte)."
Guy, K2AV wrote:
"
May I suggest that one of the necessities of using APF is to throttle back
the RF gain so that the AGC is not pushing up the noise to the level of
forcing what sounds like ringing. When I'm hearing what sounds like
ringing, moving back the RF gain (or removing PRE, or using ATT) will
usually clear it up. Using slow AGC usually does NOT help much, but backing
off RF gain so the background noise is only moderate or less usually helps."
______________________________________________________________
Elecraft mailing list
Home:
http://mailman.qth.net/mailman/listinfo/elecraftHelp:
http://mailman.qth.net/mmfaq.htmPost: mailto:
[hidden email]
This list hosted by:
http://www.qsl.netPlease help support this email list:
http://www.qsl.net/donate.html
Locked
