[TenTec] notch filter for Eagle?

Thu Jul 20 10:02:55 EDT 2017

In side-by-side comparison, an Icon IC-756 Pro2 notch filter versus an Orion/Eagle type notch filter, using my Pro 2 manual notch filter (which also works in CW, and is inside the AGC loop), I can hear weak but desired signals far more easily with the otherwise inferior Pro 2 than I can with the otherwise superior Orion/Eagle. This is especially true when the offending carrier is keyed, since the Pro 2 receiver is not constantly adjusting gain to compensate for the keyed offending carrier.

One can SORT of obtain similar results by turning off the AGC in the Orion/Eagle when using the notch filter as long as you don’t need any AGC action.

Gary

> On Jul 20, 2017, at 8:34 AM, Bernie Skoch via TenTec <tentec at contesting.com> wrote:
> 
> Rick,
> 
> I do not believe I am "out in right field."  
> 
> Someone commented that all Ten Tec notch filters are useless.  I disagreed.
> 
> 73,
> Bernie 
> 
>> 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.
>> 
>> 73
>> 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.
>> 
>> 73,
>> Bernie
>> 
>>> 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 it
>> but it is in the manual.
>>> 
>>> It's sort of useless, like all Ten Tec notch filters, since it is outside
>> 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. This
>> 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.
>>> 
>>> Gary
>>> 
>>> Sent from my iPad
>>> 
>>>> On Jul 19, 2017, at 3:05 PM, Michael Tortorella <w2iy at verizon.net> wrote:
>>>> 
>>>> Hi all, I am hearing an awful lot of steady carrier signals up here in
>> the
>>>> frozen north of Downeast Maine.   Most are not very strong and they go
>> away
>>>> 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 suggestions
>> appreciated.
>>>> 
>>>> Thanks and 73, Mike W2IY
>>>> 
>>>> 
>>>> 
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