The article was in QST Sept 1981. This might be the link to the
article on adding the filter (ARRL member's only):
http://p1k.arrl.org/pubs_archive/74970
Barry N1EU
On Mon, Feb 3, 2014 at 9:51 PM, Barry N1EU <barry.n1eu@gmail.com> wrote:
> There was an article in QST a while back (early 80's ?) about adding
> 9MHz Ten-Tec filters externally to the Triton.
>
> 73, Barry N1EU
>
> On Mon, Feb 3, 2014 at 9:28 PM, Rick - DJ0IP / NJ0IP <Rick@dj0ip.de> wrote:
>> Allen, why don't you add some selectivity to the Triton.
>> I did it to the Argonaut 505 and 509 so there is certainly room to do it to
>> the Triton.
>>
>> In my case I replaced the Argonaut's 4-pole discrete Xtals filter (SSB) with
>> a KVG 8-pole Xtal filter, then added a 6-pole 500 Hz filter in series with
>> it. I used on out of an early Yaesu transceiver. This, together with the
>> standard audio filter gave the rig excellent selectivity.
>>
>> 73 - Rick, DJ0IP
>> (Nr. Frankfurt am Main)
>>
>>
>> -----Original Message-----
>> From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of A R
>> Sent: Monday, February 03, 2014 8:00 PM
>> To: Discussion of Ten-Tec Equipment
>> Subject: Re: [TenTec] Corsair noise blanker and frequency display
>>
>> Bob,
>> Yeah, the random number generator on the display is the display itself. The
>> frequency itself is rock-solid, and after one minute, the display homes in
>> on the actual frequency.
>>
>> Having struggled with a variety of ineffective nb's on several high-tech
>> transceivers that were unable to cope with my noise, I was really impressed
>> by the TRITON's ability to eliminate the noise. If only the TRITON had the
>> selectivity of the Corsair, or the Corsair had the NB effectiveness of the
>> TRITON, I'd be a real happy camper. An outboard ANC-4 noise canceller works
>> pretty well most of the time, but the Triton's nb works all the time,
>> without having to fiddle with tuning adjustments, and I hate using outboard
>> band-aids. I'm looking seriously at adapting the Triton 249 NB into the
>> Corsair.
>>
>> 73,
>> Allen--W7GIF
>> ----- Original Message -----
>> From: Bob McGraw - K4TAX<mailto:RMcGraw@Blomand.net>
>> To: Discussion of Ten-Tec Equipment<mailto:tentec@contesting.com>
>> Sent: Monday, February 03, 2014 11:30 AM
>> Subject: Re: [TenTec] Corsair noise blanker and frequency display
>>
>>
>> I wonder if this is a display issue or are the oscillators actually
>> changing
>> frequency and same is being displayed. I have an older radio, non Tentec,
>>
>> that when first turned on the display looks more like the lights on a
>> pinball machine. The oscillators are moving as well as the display
>> reference frequency. It is a real hoot to watch for about the first 30
>> minutes or so then it finally settles down.
>>
>> As to noise blankers, historically I've found only a very few really good
>> noise blankers and at that same time there's a lot of noise blankers. The
>>
>> Collins variable blanking bandwidth system seems to always be the best.
>> The
>> rest are mostly copies and less effective compromises. Of recent, the
>> hardware NB as used in the Eagle is one of the better systems. One factor
>>
>> that seems to impact the effectiveness is more related to where the
>> blanking
>> takes place as related to the AGC system. And as Rob Sherwood concluded,
>> the AGC has a notable effect on pulse type noise.
>>
>> 73
>> Bob, K4TAX
>>
>>
>>
>>
>> ----- Original Message -----
>> From: "k6jek" <k6jek@comcast.net<mailto:k6jek@comcast.net>>
>> To: "Discussion of Ten-Tec Equipment"
>> <tentec@contesting.com<mailto:tentec@contesting.com>>
>> Sent: Monday, February 03, 2014 12:14 PM
>> Subject: Re: [TenTec] Corsair noise blanker and frequency display
>>
>>
>> > FWIW my Corsair does exactly the same thing on both counts.
>> >
>> > On Feb 3, 2014, at 9:12 AM, A R wrote:
>> >
>> >> I received my newly acquired Corsair (not II), s/n 718, and have a
>> >> couple of questions:
>> >>
>> >> At cold start-up in the morning, it takes about a minute for the
>> >> displayed frequency to stabilize and display the actual frequency.
>> During
>> >> that warm-up minute, all the display digits are toggling "randomly". Is
>>
>> >> this a common issue with the Corsairs? Is there a remedy?
>> >>
>> >> The noise blanker is ineffective with respect to eliminating or even
>> >> noticeably reducing powerline-generated noise that my TRITON noise
>> >> blanker completely eliminates. Again, is this a common issue with the
>> >> Corsairs. If so, has anyone developed a modification that improves the
>> >> effectiveness of the NB? The TRITON's NB is so effective in eliminating
>>
>> >> at least the noise that plagues me, I'd sure like to get the same NB
>> >> effectiveness out of the Corsair. The NB's of the TRITON and Corsair
>> are
>> >> architecturally the same (signal flow and conditioning), so if the
>> >> Corsairs have characteristically ineffective noise limiters, my
>> >> powerline-generated noise is enough of an operating problem, that I
>> would
>> >> even entertain adapting the TRITON's NB to the Corsair....as a last
>> >> resort.
>> >>
>> >> Allen------W7GIF
>> >> _______________________________________________
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>> >>
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>> >
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>> >
>>
>>
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