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261. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Fri, 8 Dec 2006 22:08:42 -0500
Yes, what was explained at the bottom is about right. We did not have to have adaptive filters in the applications I used, because the signal environment was always somewhat a given. But you could ad
/archives//html/TenTec/2006-12/msg00156.html (12,476 bytes)

262. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Fri, 8 Dec 2006 22:12:19 -0500
Excellent News :) of which not
/archives//html/TenTec/2006-12/msg00157.html (10,826 bytes)

263. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Fri, 8 Dec 2006 22:20:59 -0500
Grant, I should be much more careful in defining my terms. That way I would be less likely to make confusing remarks ! When you say that bandwidth reduction (by whatever means) is a true form of nois
/archives//html/TenTec/2006-12/msg00158.html (11,897 bytes)

264. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Fri, 8 Dec 2006 22:28:40 -0500
Indeed yes, all correct. This is one of the "other" methods I had in mind when I wrote one of my earlier posts. And narrow bandwidth makes the job of separating "good" signals from "bad" signals more
/archives//html/TenTec/2006-12/msg00163.html (13,188 bytes)

265. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sat, 9 Dec 2006 17:01:30 -0500
Jerry points out a real weakness of many people's approach to FFT analysis - windowing. When I was doing vibration analysis for Kodak we used a B&K 2032 audio spectrum analyzer, which is of course an
/archives//html/TenTec/2006-12/msg00194.html (14,452 bytes)

266. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sat, 9 Dec 2006 17:05:33 -0500
Lin, Are you doing SETI work ? It seems to me I've run into you over there ? Regards, Gary, AA2IZ Grant, you are soooo right. It raises the hair on the back of my neck ;) Jerry said: You hit it on th
/archives//html/TenTec/2006-12/msg00195.html (14,715 bytes)

267. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sat, 9 Dec 2006 17:05:59 -0500
Ooops...I meant that note to Lin to go direct. Please excuse me. Gary Grant, you are soooo right. It raises the hair on the back of my neck ;) You hit it on the head. Doug Smith's NR implementation w
/archives//html/TenTec/2006-12/msg00196.html (14,562 bytes)

268. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sat, 9 Dec 2006 17:12:46 -0500
That's a good book, isn't it Grant ? :) I have several of the in-house publications of B&K that are also very instructive. If its an FIR filter with suitable characteristics, ought to work pretty wel
/archives//html/TenTec/2006-12/msg00197.html (13,433 bytes)

269. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 10 Dec 2006 00:13:31 -0500
That's right Jerry. But I did not say it could. Just commented that FIR filters work pretty well when made with suitable characteristics. Only the "real" DSP chips I talked about way earlier in some
/archives//html/TenTec/2006-12/msg00205.html (11,631 bytes)

270. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 10 Dec 2006 00:17:47 -0500
And this is why I said the FIR filter works pretty well. It takes a darn good stab at approaching what the really high end filters can do with brute force....without needing the brute force. It canno
/archives//html/TenTec/2006-12/msg00206.html (12,881 bytes)

271. Re: [TenTec] Noise Reduction Setting (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 10 Dec 2006 02:15:24 -0500
Grant.... Well I already took your advice in my previous post and ended my comments on the thread. On the other hand...I'm an aerospace engineer by trade.....and I love discussing how Rockets and Air
/archives//html/TenTec/2006-12/msg00208.html (11,397 bytes)

272. Re: [TenTec] Employee Ownership of Orion (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Mon, 11 Dec 2006 16:50:52 -0500
Hi Scott, My point - which seems to have been missed by many posters - was that ownership was not a precondition to understanding some technical subject. My further point was that Ten Tec employees,
/archives//html/TenTec/2006-12/msg00242.html (10,795 bytes)

273. Re: [TenTec] [Fwd: FCC ELIMINATES CW EXAM] (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Wed, 20 Dec 2006 17:20:21 -0500
My calculator is light powered. But I take your point. The idea is to learn some stuff. Facts, figures, approaches to problem solving, bodies of theory. Then out in the world you figure out how to ap
/archives//html/TenTec/2006-12/msg00511.html (11,243 bytes)

274. Re: [TenTec] Radio Control/Contesting?? (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sat, 23 Dec 2006 19:09:06 -0500
I had a Pegasus too. I loved it. But since I'm primarily interested in contesting, I had to trade it. The front end just was not up to contest weekends. 73 de Gary, AA2IZ panel and never
/archives//html/TenTec/2006-12/msg00631.html (10,446 bytes)

275. Re: [TenTec] Radio Control/Contesting?? (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sat, 23 Dec 2006 19:14:32 -0500
There was an original Orion. Sometimes called the classic, or the Orion 1, but often just "Orion". Then later there was an Orion II. It is different hardware. No, you cannot make one into the other.
/archives//html/TenTec/2006-12/msg00633.html (26,722 bytes)

276. Re: [TenTec] Radio Control/Contesting?? (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sat, 23 Dec 2006 21:35:07 -0500
Well you don't have to buy a newer Ten Tec rig to get a great contest radio. It was just the Jupiter/Pegasus series that had the weaker front ends. You can use Corsair I or II, or the Omni V series,
/archives//html/TenTec/2006-12/msg00641.html (11,566 bytes)

277. Re: [TenTec] Radio Control/Contesting?? (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 24 Dec 2006 15:59:47 -0500
Heck, Even the corsair II has dual receive when you have the external VFO. It has obvious limitations of course. But you can listen to two signals at once, and change the relative sound of each one v
/archives//html/TenTec/2006-12/msg00678.html (12,368 bytes)

278. Re: [TenTec] Dual frequency receive (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Mon, 25 Dec 2006 22:14:57 -0500
With the Corsair II you do NOT have to switch back and forth. You listen to both at the same time. The relative levels are adjustable with a POT. Gary
/archives//html/TenTec/2006-12/msg00722.html (10,106 bytes)

279. Re: [TenTec] ALC action on Orion (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sat, 30 Dec 2006 19:08:23 -0500
Well....the way I've always used the two controls together is: 1. Set power control to about the desired level. 2. Adjust ALC for voice peaks (if using voice). 3. Use moderate sound card gain if usin
/archives//html/TenTec/2006-12/msg00848.html (9,732 bytes)

280. Re: [TenTec] Orion and RF Feedback (score: 1)
Author: "Gary Hoffman" <ghoffman@spacetech.com>
Date: Sun, 15 Oct 2006 17:03:49 -0400
This is correct.....a quarter wave will be a bad thing. Either you have to be significantly less than a quarter wave, or, tuned at a half wave (which will reflect the low impedance of the ground into
/archives//html/TenTec/2006-10/msg00429.html (10,125 bytes)

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