Rick,
From the rumour mill, the upcoming Icom IC-7610 direct sampling radio
will have much better bandpass filtering than the IC-7300. Until it is
generally available though, I would not believe any of the rumours. Also
the price of the IC-7610 will most likely be much higher than the
combined price of the IC-7300 and the outboard preselector.
The other thing to consider is that the radios in your comparison, the
Orion/Eagle/K3 were all much higher priced than the IC-7300. (The Eagle
fire sale prices being the exception.) Perhaps a fairer comparison may
be the Orion/Eagle/K3 with the IC-7610.
We are again at one of those points in amateur radio where we are seeing
a big shift, like the spark gap/carrier shift, the AM/SSB/transceiver
shift, the Japanese hybrids, synthesizers, dsp, and now direct sampling.
Look at what Apache Labs are doing with the ANAN products. Their have
broken through the ceiling on transmitter IMD, reducing it by orders of
magnitude.
I expect that in the next few years we are going to see some amazing new
radios.
73, Darrell VE7IU
On 17-07-20 11:19 PM, rick@dj0ip.de wrote:
Darell, you are spot on in your description.
I will add that Scott (W4PA) offers an INRAD option to the 7300 that enables
you to insert a preselector...
And there is a guy in Greece producing a preselector ("assembled board but kit"
because you must add the band switch and the cabinet). It is only missing the 60m band.
See: https://www.sv1afn.com/ham_band_presel.html
Legally it's a kit but there's not much to do to get it to work.
Obviously this was to avoid FCC and CE approval hassles.
So with those two add-ons, the problem is solved for us Europeans.
It just bothers me a bit that after 30 years of needing a preselector, then
finally storing them away when the Orion/Eagle/K3 came along, we're back to
needing the preselector again.
Which just goes to show ya, you still can't have your cake and eat it too!
73
Rick, DJ0IP
-----Original Message-----
From: Darrell Bellerive [mailto:ve7iu@runbox.com]
Sent: Friday, July 21, 2017 12:28 AM
To: Discussion of Ten-Tec Equipment
Cc: rick@dj0ip.de
Subject: Re: [TenTec] notch filter for Eagle?
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?Documen
t=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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Darrell Bellerive
VE7IU
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