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Re: [TenTec] notch filter for Eagle?

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] notch filter for Eagle?
From: Darrell Bellerive <ve7iu@runbox.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 20 Jul 2017 15:27:43 -0700
List-post: <mailto:tentec@contesting.com>
It is really hard to beat the value of the IC-7300. It is not perfect, but considering the features, performance, audio quality, and ergonomics at its price point, it is tough to beat.

Not only is there a manual notch filter, but there are three width settings for the manual notch: wide, mid, or narrow. I am not sure what the those settings correspond to in Hertz though.

When I purchased my Eagle, my choice was between the Eagle, the Kenwood TS-590S, and the Elecraft K3. At that time there were no TS-590SG or K3S models.

I chose the Eagle because of its performance edge over the TS-590S. I do not care for the ergonomics or audio of the K3. And the K3 was more expensive.

Today, I would choose the IC-7300. I am fortunate to live in an area that is not plagued by nearby high powered transmitters, so the lack of bandpass filtering in the IC-7300 is not a big factor for me.

At the price point of the IC-7300, with its performance, features, audio quality, and ergonomics, it is tough to beat. The TS-590SG does come close, but it is older technology, and the issues Kenwood has had with the fans being installed backwards and not starting at low speed, worries me that Kenwood's quality may not be what it used to be.

73, Darrell VE7IU



On 17-07-20 02:45 PM, rick@dj0ip.de wrote:
Now that's super, Darrell!
I haven't used one yet, only looked at it at the ham fest in
Friedrichshafen.
I didn't see the manual notch.

It's beginning to look like the 7300 is the only radio left out there to
buy.
All others are for rock collectors or computer geeks! (hi)

The 7300 as with most of the SDR radios lacks decent bandpass filters on the
front end, making them a bit flaky here in Europe.  For instance when on
20m, the filter only has 10 dB rejection of signals on the 40m band.  Same
goes for the strong broadcast stations on the 41 and 49m bands.   A
preselector will be a must on a large multi-band antenna.

But as I said, not much choice these days.

73
Rick, DJ0IP


-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Darrell
Bellerive
Sent: Thursday, July 20, 2017 5:33 PM
To: tentec@contesting.com
Cc: rick@dj0ip.de
Subject: Re: [TenTec] notch filter for Eagle?

  From page 43 of the Icom IC-7300 manual
(http://www.icomamerica.com/en/downloads/DownloadDocument.aspx?Document=787)
:

"The IC-7300 has Auto Notch and Manual Notch functions.
Auto Notch:     Used in the SSB, AM and FM modes.
Manual Notch:     Used in the SSB, CW, RTTY and AM modes."

How's things out in right field, Rick? :-)

73, Darrell VE7IU


On 17-07-20 05:08 AM, rick@dj0ip.de wrote:
7300? 7600?  > > Icom is selling the older radios at dumping prices
because
everybody > wants the new stuff (without manual notch filter). > > I guess I
should have said "every radio designed within the past 5 > years".... > >
However it is indeed possible to have the auto-notch work within the > AGC
loop. My little SKY-SDR QRP transceiver does and its notch depth > is over
90 dB. It can even notch out two-tone interference by that > amount, leaving
the SSB signal on channel, free and in the clear. > > And it does not turn
on during CW because it would notch every dit > and dah completely out. > >
73 Rick > > -----Original
Message----- From: TenTec > [mailto:tentec-bounces@contesting.com] On Behalf
Of Greg S via > TenTec Sent: Thursday, July 20, 2017 2:00 PM To:
Discussion of > Ten-Tec Equipment Cc: Greg S Subject: Re: [TenTec] notch
filter for > Eagle? > > Every ICOM HF rig has a manual and auto notch.
Unfortunately most are > an either/or proposition. Greg, KC8HXO >
-------------------------------------------- On Thu, 7/20/17, >
rick@dj0ip.de <Rick@DJ0IP.de> wrote: > > Subject: Re: [TenTec] notch filter
for Eagle? To: "'Discussion of > Ten-Tec Equipment'"
<tentec@contesting.com> Date: Thursday, July 20, > 2017, 3:30 AM > > You
guys are all out in right field. > > No radio's auto notch filter works in
CW mode. They cannot > distinguish between the useful tone and the
disturbing tone. > > And yes, in that case, a manual notch filter is indeed
better, but > show me a radio built today that has one. > > I find the
Eagle's notch filter effective on SSB. > > 73 Rick, DJ0IP > -- Darrell
Bellerive VE7IU

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--
Darrell Bellerive
VE7IU

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