[TenTec] notch filter for Eagle?
Rick at DJ0IP.de
Thu Jul 20 09:51:05 EDT 2017
Sri Ernie, I didn't mean everyone on the list, just those who say the notch
Eagle's filter is worthless and especially those who think an auto notch
filter should work in CW mode.
The days of manual notch filters are over, once we've switched to direct
That may sound like a slight disadvantage, but the numerous advantages of
SDR far outweigh it.
On CW, you can have the DSP filter set to 50 Hz or less. With filters that
have 95 dB depth, there's not much need for a manual notch anymore. That
need was yesterday with crystal filters.
In CQWW CW last year I didn't have but about 10 hours to work the contest,
due to family obligations. So I spent the time playing, comparing my $800
SDR transceiver to the Eagle.
I still believe the Eagle to have one of the best receivers going for CW
In all cases I found the little SKY-SDR's RX to be as good as the Eagle, as
far as hearing very weak DX stations in near proximity of strong QRM. Its
ergonomics are not as good because it is a tiny little radio, but its
ability to pull stations out of surrounding garbage is excellent. It has no
crystal filters at all. Crystal filters cost $100 apiece, and that price is
increasing with the demand for crystal filters. You can save a bundle and
still get performance if you buy a good SDR rig. And that's the way the
market is going, not backwards.
Ergo, no more manual notch filters.
From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Bernie
Skoch via TenTec
Sent: Thursday, July 20, 2017 3:34 PM
To: Discussion of Ten-Tec Equipment
Cc: Bernie Skoch
Subject: Re: [TenTec] notch filter for Eagle?
I do not believe I am "out in right field."
Someone commented that all Ten Tec notch filters are useless. I disagreed.
> On Jul 20, 2017, at 02:30, rick at dj0ip.de <Rick at DJ0IP.de> wrote:
> 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.
> Rick, DJ0IP
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of
> Bernie Skoch via TenTec
> Sent: Thursday, July 20, 2017 3:21 AM
> To: Discussion of Ten-Tec Equipment
> Cc: Bernie Skoch; w2iy at verizon.net
> Subject: Re: [TenTec] notch filter for Eagle?
> "It's sort of useless, like all Ten Tec notch filters..."
> I _LOVE_ my Orion II notch filter!
> The automatic feature is good, but the manual one is about the best
> I've ever used.
>> On Jul 19, 2017, at 16:33, Gary F <dukeshifi at comcast.net> wrote:
>> The Eagle does have a notch function. I don't recall how to activate
> but it is in the manual.
>> It's sort of useless, like all Ten Tec notch filters, since it is
> the AGC loop, so, while it does not have the carrier, it also
> attenuated your desired signal by about as much as it reduces the carrier.
>> The reduction to 20 watts in Tune is self-defense. Orion's do it too.
> is to prevent the presence of full 100 watts into a mismatch. It is
> good policy.
>> Orion's had an option in which you could press the Power button, I
> believe, to get 100 watts in Tune after match had been reached.
>> Red arid green the A//B VFO, there really is no A or B VFO in the
> traditional sense and Eagle only has one tuning knob. Therefore, the
> A/B indicator serves no function in transceive operation. In split
> operation, that indicator should flip when going fro RX to TX to tell
> you which displayed frequency is the TX frequency.
>> Sent from my iPad
>>> On Jul 19, 2017, at 3:05 PM, Michael Tortorella <w2iy at verizon.net>
>>> Hi all, I am hearing an awful lot of steady carrier signals up here
>>> frozen north of Downeast Maine. Most are not very strong and they go
>>> when I disconnect the antenna so they are external to the radio.
>>> Today I am chasing TR8CA on 20 CW, he is way down in the noise, and
>>> 100 Hz away from one of these carriers. Sure would be nice to have
>>> something like a notch filter to help in situations like these but I
>>> could not see anywhere in the manual or front panel where I could
>>> notch the offending carrier. Is there any list wisdom on this?
>>> On another note, I did contact service at TT last week with my
>>> question about power out in autotune; after only a few days delay I
>>> got an answer that the power out in autotune is 20 watts even though
>>> the power output shown on the display is 100. This seems not quite
>>> right from a human factors point of view, maybe there can be a
>>> firmware fix? Also, when exchanging VFOs, the A,B labels do not
>>> change even when the B vfo is in large type at the top of the
>>> display. I find this confusing. OK, I guess this turned into a
>>> longer letter about a couple of other things besides notch
>>> filtering, so please excuse my prolixity and thank for the BW. Any
>>> Thanks and 73, Mike W2IY
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