I use my manual notch filter on probably 10% of my CW QSOs.
-----Original Message-----
From: Joe Papworth via TenTec <tentec@contesting.com>
To: tentec <tentec@contesting.com>
Cc: k8mp <k8mp@aol.com>; oldlongbeard <oldlongbeard@yahoo.com>
Sent: Thu, Jul 20, 2017 9:43 am
Subject: Re: [TenTec] notch filter for Eagle?
Quick poll:How often do those on the list actually need or use your notch
filters?Most of my QSOs are CW contest QSOs. Many times the bands are so
crowded that a ginsu knife would come in handy and yet I rarely need the notch
filter.I'm just curious...Later, Joe, K8MPSent from AOL Mobile
Mail-----Original Message-----From: Dukes HiFi <dukeshifi@comcast.net>To:
Discussion of Ten-Tec Equipment <tentec@contesting.com>Cc: Greg S
<oldlongbeard@yahoo.com>Sent: Thu, Jul 20, 2017 10:21 AMSubject: Re: [TenTec]
notch filter for Eagle?Rick:Since your SDR has notch inside the AGC loop, it
must not be all that difficult to accomplish. Of course, I do not have
sufficient knowledge of SDR designs to know how they manage AGC or notch
functions.Too bad no one is writing software for the Orion anymore. It would be
nice if that change could be done. I might even buy one then...I should have
added the caveat in my remark regarding the relative uselessness of a notch
filter outside the AGC line by saying “useless to ME”. Others are certainly
free to believe that an external notch filter (that is, external to the AGC
loop) is equally effective (manual or otherwise).This topic was beaten to
death maybe 30 to 40 years or so ago when relatively decent external filters,
such as the Autek and later on when DSP devices were introduced. They were
pitched as offering Collins or Drake-like performance in otherwise mediocre
receivers. They didn’t, but they did make operation less annoying to some
degree. They also worked pretty well if you turned off the AGC and used the RF
gain pot to compensate for variations in signal strength.GaryPS: Icom is the
leader here in direct SDR, FOR ME. The performance is not there yet but I have
zero interest in needing to have my PC on to run my radio. The 7300 does not
need a PC to work, the others do. They are headed in the right direction. If
Ten Sec ever introduces a new radio, likely it will head in that direction
too.> On Jul 20, 2017, at 7:08 AM, <a
href="mailto:rick@dj0ip.de";>rick@dj0ip.de</a> <<a
href="mailto:Rick@DJ0IP.de";>Rick@DJ0IP.de</a>> wrote:> >
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