[TenTec] notch filter for Eagle?

Thu Jul 20 08:08:59 EDT 2017

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

 -----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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