[TenTec] notch filter for Eagle?

[Darrell Bellerive]

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 at 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 at contesting.com] On Behalf Of Darrell
> Bellerive
> Sent: Thursday, July 20, 2017 5:33 PM
> To: tentec at contesting.com
> Cc: rick at 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 at 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 at 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 at dj0ip.de <Rick at DJ0IP.de> wrote: > > Subject: Re: [TenTec] notch filter
> for Eagle? To: "'Discussion of > Ten-Tec Equipment'"
> <tentec at 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