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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