[Elecraft] APF Results at an Old Timer's shack
Jim Cox
jcox123 at bellsouth.net
Thu Nov 4 11:07:10 EDT 2010
I agree Wes, way too much ringing for my taste. I have never cared for the
ultra narrow filters myself.
I listened using the APF on 80 cw last evening, works well but the
distortion certainly hurts the copy.
Jim K4JAF
----- Original Message -----
From: "Wes Stewart" <n7ws at yahoo.com>
To: "Elecraft Reflector" <elecraft at mailman.qth.net>; "JAMES ROGERS"
<w4atk at bellsouth.net>
Sent: Thursday, November 04, 2010 9:57 AM
Subject: Re: [Elecraft] APF Results at an Old Timer's shack
To this old dog's ears there is way too much ringing.
Even in my EME days I never felt the need for these super narrow filters. I
used a passive 200 Hz wide filter centered on 600 Hz. A few hours of
listening to noise in a too-narrow filter and you start hearing things that
aren't there, especially with some distortion thrown in, and ringing is
distortion.
Today I prefer a lower beat note (~450 Hz) and a couple of hundred Hz BW is
fine most of the time.
Wes
--- On Thu, 11/4/10, JAMES ROGERS <w4atk at bellsouth.net> wrote:
Well, I just wasn't sure I would use it, I had such good results with
just the DUAL PB function. So I sought out the weakest signal I could
find this morning, R5ZZ, who was not copiable here, but I could hear
some Ws working him. I dialed in the APF and there he was, and
copiable. So mea culpa. I am now a convert. Old Dogs can learn new
tricks.
73s Jim, W4ATK
JIM ROGERS
w4atk at bellsouth.net
http://web.me.com/jimrogers_w4atk
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