[TenTec] notch filter for Eagle?

[rick@dj0ip.de]

Oh I agree, Darrell.
I just would have preferred to pay $100 more and have the pre-selection
built-in.
But since the whole world doesn't need it, just Europe, I understand why
they did it the way they did.

Of course those running Multi-Multi contests need it too, regardless of
where on this planet they are.

No complaints here, just stating some facts which no one else seems to
mention.

After some long discussions with Rob Sherwood on Cost Of Ownership (COO), I
set a stake in the ground and said I am simply not going to pay more than
2000 EUR for any radio.  that rules out the 7610 for me, even though it is
probably worth the money and I would dearly love to own one.  I just don't
use any ham radio that much.  

Since retiring from work and from serious contesting, I don't want to spend
so much money on a radio.

After all,  "IT'S THE ANTENNA, STUPID"  (hi)

73
Rick, DJ0IP

-----Original Message-----
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Darrell
Bellerive
Sent: Friday, July 21, 2017 5:39 PM
To: tentec at contesting.com
Subject: Re: [TenTec] notch filter for Eagle?

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 at 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 at runbox.com]
> Sent: Friday, July 21, 2017 12:28 AM
> To: Discussion of Ten-Tec Equipment
> Cc: rick at 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 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?Docume
>> n
>> 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 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
>
>
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--
Darrell Bellerive
VE7IU

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