[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






______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html 



More information about the Elecraft mailing list