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261. Re: [TenTec] Questions about NR i.e. Orion (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Thu, 23 Mar 2006 19:03:10 -0500
Incidentally, I also have professional experience with adaptive noise elimination. I agree completely with the comments below. Has nothing to do with bandwidth as measured on a scope. Obviously, we a
/archives//html/TenTec/2006-03/msg01033.html (15,150 bytes)

262. Re: [TenTec] Questions about NR i.e. Orion (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Thu, 23 Mar 2006 19:06:24 -0500
Yes Grant...I can reply to this one.... It is really bit by bit. Regards, Gary so you _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting
/archives//html/TenTec/2006-03/msg01034.html (9,776 bytes)

263. Re: [TenTec] Questions about NR i.e. Orion (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Fri, 24 Mar 2006 12:43:12 -0500
Lin, There are many excellent references available, but some of them make for very dense reading. Some of the more basic stuff can be found in Technical notes published by Bruel and Kjaer Instruments
/archives//html/TenTec/2006-03/msg01061.html (18,945 bytes)

264. Re: [TenTec] 2.033 (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Wed, 3 May 2006 14:54:10 -0400
FWIW.....not ALL DSP just narrows bandwidth. The way it worked when I used to work with audio DSP systems in a previous life (and the IF of the Orion is at an audio frequency) is that each sample of
/archives//html/TenTec/2006-05/msg00132.html (10,385 bytes)

265. Re: [TenTec] 2.033 (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Wed, 3 May 2006 15:17:07 -0400
I just meant that 15 kHz is a frequency in the audio range. I know it is used as an IF frequency in the Orion. The point was that the frequency is very low....low enough that DSP chips can process th
/archives//html/TenTec/2006-05/msg00135.html (13,662 bytes)

266. Re: [TenTec] 2.033 (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Wed, 3 May 2006 23:09:56 -0400
Right you are Jerry....the remaining signal after the technique I described is applied is indeed pretty hacked up. Part of my point in talking about it was to try and bring that very fact out to peop
/archives//html/TenTec/2006-05/msg00150.html (18,128 bytes)

267. Re: [TenTec] 2.033 (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Wed, 3 May 2006 23:11:53 -0400
Grant, no, it isn't the same deal. In the final analysis, it does not have the same effect. Correlation based DSP computer algorithms are much more effective at noise reduction than are band pass fil
/archives//html/TenTec/2006-05/msg00151.html (9,631 bytes)

268. Re: [TenTec] 2.033 (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Wed, 3 May 2006 23:26:25 -0400
That's right Duane, that is exactly what you get, highly correlated signal plus noise in the band pass. You are right, that is why the other approach can be in fact better, given that other related f
/archives//html/TenTec/2006-05/msg00153.html (10,478 bytes)

269. Re: [TenTec] 2.033 (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Thu, 4 May 2006 13:42:48 -0400
You are right Grant....that is yet another method. And indeed the methods are very numerous. But it is still not the one I was talking about which uses no spectral filters, dynamic or otherwise. It s
/archives//html/TenTec/2006-05/msg00176.html (10,201 bytes)

270. Re: [TenTec] 2.033 (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Thu, 4 May 2006 14:13:57 -0400
Grant, Actually I've now gotten several off-line requests for just such a reference. I used to have several books and magazines that talked about it. I've told everyone that I will go and search thro
/archives//html/TenTec/2006-05/msg00178.html (9,930 bytes)

271. Re: [TenTec] 2.033 (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Thu, 4 May 2006 14:34:15 -0400
Well....you are asking for an opinion...always a dangerous thing ! <grin> But.... In my opinion, if one could choose, in the case of SSB (which is comparatively wide band, but highly correlated) the
/archives//html/TenTec/2006-05/msg00183.html (12,966 bytes)

272. Re: [TenTec] Ten Tec (Mobile CW Paddle) (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Fri, 26 May 2006 13:25:07 -0400
I have to also say that safety is really key here. When I am driving, if I get involved in a really technical discussion with a passenger (I'm an engineer, sad to say :) ) I can easily get so deeply
/archives//html/TenTec/2006-05/msg00664.html (12,282 bytes)

273. Re: [TenTec] satellite modems and ham radio (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Tue, 13 Jun 2006 21:11:41 -0400
I have a dish network TV setup as well. I also have wireless internet, that I provide free to some of my neighbors. None of this is affected by my kilowatt. However, I did have to properly ground the
/archives//html/TenTec/2006-06/msg00239.html (12,001 bytes)

274. Re: [TenTec] Using Airpax breaker (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 18 Jun 2006 18:03:15 -0400
Not to belabor the point excessively, but Mike is right. The Air-Pax units are specified for use with Ten Tec rigs specifically because they are so fast. Have saved my rig and many other's. Use them
/archives//html/TenTec/2006-06/msg00355.html (11,395 bytes)

275. Re: [TenTec] Using Airpax breaker (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 18 Jun 2006 18:13:53 -0400
I understand the intuition that a fuse ought to be fast. It seems simple, right ? No moving parts. However..... It is a thermodynamic device. It requires that the metal in the fuse be heated for a pe
/archives//html/TenTec/2006-06/msg00357.html (16,441 bytes)

276. Re: [TenTec] TenTec] SDR-1000 MDS (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 16 Jul 2006 15:31:20 -0400
The problem with using software and/or DSP Chips is that no one, except for the military, can afford DSP chips that can operate on signals up in the megahertz range. Thus, all DSP work in amateur rig
/archives//html/TenTec/2006-07/msg00489.html (11,646 bytes)

277. Re: [TenTec] SDR 1000 vs Orion vs SDR-X (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 16 Jul 2006 15:39:34 -0400
Yes - and this would help to add clarity to the discussion, since many people still seem not to know that the card is in fact being used as part of a DSP processing system in this arrangement. ______
/archives//html/TenTec/2006-07/msg00490.html (8,702 bytes)

278. Re: [TenTec] Corsair II (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 6 Aug 2006 21:30:10 -0400
Hi All, I too have owned more than one Corsair (or Corsair II). I'm not trolling the list or looking to start a flame war on this subject. I'd just like to comment that the units I have owned have al
/archives//html/TenTec/2006-08/msg00296.html (10,574 bytes)

279. Re: [TenTec] "End of an Era" (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 20 Aug 2006 20:21:13 -0400
Well....actually, you CAN plug an antenna into your soundcard. Just use the appropriate connector. Of course, it will be useless..... I'm sorry....I must be insane....had to make that joke. 73 de Gar
/archives//html/TenTec/2006-08/msg00615.html (10,847 bytes)

280. Re: [TenTec] Centurion Amplifier - 110 volt? (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 24 Sep 2006 18:13:49 -0400
It will pass code if you ONLY wire the sub-panel to supply 240 VAC and NOT 120. That is, one hot lead is in the black lead. The other hot lead is in the white wire, which is taped conspicuously at bo
/archives//html/TenTec/2006-09/msg00555.html (11,671 bytes)

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