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Re: [TenTec] notch filter for Eagle?

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] notch filter for Eagle?
From: Bernie Skoch via TenTec <tentec@contesting.com>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Thu, 20 Jul 2017 21:07:02 -0400
List-post: <mailto:tentec@contesting.com>
It's a very nice feature if you are bring QRMd by a nearby carrier.  With a 
good working one you can notch the carrier out and not have to listen to it.

> On Jul 20, 2017, at 20:51, Rick Cochran via TenTec <tentec@contesting.com> 
> wrote:
> 
> Well, use almost all CW on my OMNI VII.  I am not sure what the notch filter 
> is.  Never used it.
> 
> I have a couple of Yaesu rigs and have no idea how to use notch.
> 
> Doesn't sound like a critical feature to me.
> 
> 73s,
> 
> WO8L 
> 
> 
> 
> Sent from my iPhone
> 
>> On Jul 20, 2017, at 8:22 PM, Carl Moreschi <n4py3@earthlink.net> wrote:
>> 
>> I find the hardware noise blanker on my Orion works very well.  It's on a 
>> par with the Flex 6500 noise blanker system.
>> 
>> Carl Moreschi N4PY
>> 58 Hogwood Rd
>> Louisburg, NC 27549
>> www.n4py.com
>> 
>>> On 7/20/2017 8:18 PM, David W LeJeune, Sr wrote:
>>> Thanks, Rick.  I'd heard that Rob had a hand in it's improvement.  Had a 
>>> friend who had one of the original Orion's and the noise blanker was almost 
>>> worthless.  On my Orion II, the auto notch still causes distortion of the 
>>> audio signal when in use.  Not sure if this is common.  Still use the Orion 
>>> II on 80meter SSB and a lot on CW on all bands.  But the Flex 6500 is a lot 
>>> better than my old Flex 5000 on CW.
>>> 
>>> Dave WN5V
>>> 
>>> -----Original Message-----
>>> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of 
>>> rick@dj0ip.de
>>> Sent: Thursday, July 20, 2017 4:55 PM
>>> To: 'Discussion of Ten-Tec Equipment'
>>> Subject: Re: [TenTec] notch filter for Eagle?
>>> 
>>> Dave,
>>> 
>>> That is only because Rob Sherwood worked long and hard on Ten-Tec and FLEX 
>>> to fix their problems.  When they originally shipped, neither were any good 
>>> at blanking electric fences.
>>> We all owe Rob a huge amount of gratitude for the many years of service he 
>>> has given us.
>>> 
>>> 73
>>> Rick, DJ0IP
>>> 
>>> -----Original Message-----
>>> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of David W 
>>> LeJeune, Sr
>>> Sent: Thursday, July 20, 2017 9:48 PM
>>> To: 'Discussion of Ten-Tec Equipment'
>>> Subject: Re: [TenTec] notch filter for Eagle?
>>> 
>>> I have an electrical fence next door.  Both the noise blanker in my Orion 
>>> II and the one in my Flex 6500 easily take out that type of noise as well 
>>> as ignition noise.  The Orion has a manual notch filter (sort of).  It's 
>>> really a fixed freq notch at either 300 hz or 1050 hz.  You can use that 
>>> with CW and the RIT - move the interfering hetrodyne inside of the selected 
>>> notch. Of course, you have to accept the change in the pitch of the CW 
>>> signal.
>>> 
>>> Dave WN5V
>>> 
>>> -----Original Message-----
>>> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of 
>>> rick@dj0ip.de
>>> Sent: Thursday, July 20, 2017 9:36 AM
>>> To: 'Discussion of Ten-Tec Equipment'
>>> Subject: Re: [TenTec] notch filter for Eagle?
>>> 
>>> Gary,
>>> 
>>> Your Pro 2 of course is ancient history now.  Was a great radio in its day.
>>> Manual notch filters are fine on CW because "we" use our brain to notch the 
>>> disturbance and not the desired frequency.  The auto-notch can't tell the 
>>> difference.
>>> 
>>> Regardless of what it can and can't do, if it dies, you probably won't even 
>>> get spare parts for it.  And brand new radios are no longer coming with 
>>> manual notch filters (except for the old stock sitting on shelves and being 
>>> offered at dumping prices to get rid of it).
>>> 
>>> If my memory serves me right, that was still one of the radios with a 
>>> useful noise blanker for blanking out electrical fences.  None of the new 
>>> DSP noise blankers can do that as well as the old noise blankers.
>>> 
>>> There certainly were advantages in the older radios but we will probably 
>>> only see one more new radio come out in Japan with that old technology...at 
>>> the end of this year.
>>> 
>>> I don't know if Mike will bring out an Eagle or Omni VII again.  The eagle 
>>> has a good noise blanker, the OM7 has a DSP blanker, but it has been 
>>> improved in firmware for use near electrical fences; still not as good as 
>>> older technology though.
>>> 
>>> Ones step forward, two steps back! (hi)
>>> 
>>> 73
>>> Rick
>>> 
>>> 
>>> -----Original Message-----
>>> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Dukes HiFi
>>> Sent: Thursday, July 20, 2017 4:03 PM
>>> To: Discussion of Ten-Tec Equipment
>>> Cc: Bernie Skoch
>>> Subject: Re: [TenTec] notch filter for Eagle?
>>> 
>>> 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@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@dj0ip.de<Rick@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@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@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@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@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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>>>>>>> http://www.avg.com
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>>>>>> 
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