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1. [AMPS] Blown TL922A... What to do? (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Sun, 10 Sep 2000 15:18:55 -0400; I've monitored this reflector for the past several years; both Tom and Rich have provided helpful information in response to my occasional queries. My engineering background and professional experien; /archives//html/Amps/2000-09/msg00409.html (11,756 bytes)
2. [AMPS] Blown TL922A... What to do? (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Sun, 10 Sep 2000 17:49:24 -0400; model modeled "is likely to be able to oscillate" is a subjective assessment; we seek objective, repeatable proof. Either the model oscillates, or it doesn't. If the model oscillates, it will do so; /archives//html/Amps/2000-09/msg00415.html (10,582 bytes)
3. [AMPS] Blown TL922A... What to do? (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Mon, 11 Sep 2000 00:21:29 -0400; Determining by measurement that one instance of a circuit fails to oscillate does prove false the assertion "every instance oscillates". But the domain here is production, where there are hundreds o; /archives//html/Amps/2000-09/msg00440.html (10,147 bytes)
4. [AMPS] Blown TL922A... What to do? (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Mon, 11 Sep 2000 20:59:54 -0400; But Agreed - measurement is necessary to validate a model. This does not diminish the value of modeling. parameters. Given a significant number of parameters and the need to assess circuit performan; /archives//html/Amps/2000-09/msg00504.html (11,737 bytes)
5. [AMPS] Blown TL922A... What to do? (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Tue, 12 Sep 2000 19:45:15 -0400; Traditional techniques have failed to resolve the case in question -- whether or not VHF oscillations occur, and how to best suppress them if they do -- in at least 3 years of near-daily interchange; /archives//html/Amps/2000-09/msg00570.html (10,168 bytes)
6. [AMPS] Blown TL922A... What to do? (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Tue, 12 Sep 2000 21:35:48 -0400; If they were indeed molehills, the questions surrounding VHF oscillation and suppressor effectiveness would have been resolved long ago. Words like "wild", "unclean" and "decent" are subjective, and; /archives//html/Amps/2000-09/msg00576.html (12,833 bytes)
7. [AMPS] Modelling and its failures (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Wed, 13 Sep 2000 20:19:45 -0400; in planar Resistors are equally easy to measure, but resistor models are provided so that more complex circuits containing resistors can be modeled. The same should be true of solenoid inductors. Ha; /archives//html/Amps/2000-09/msg00666.html (8,782 bytes)
8. [AMPS] Blown TL922A... What to do? (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Wed, 13 Sep 2000 21:18:21 -0400; There is no way for either of us to know how many people agree that "parasitics are the root of all evil" -- whatever that means. But a quick scan of this reflector's archives will remind you that t; /archives//html/Amps/2000-09/msg00673.html (14,970 bytes)
9. [AMPS] 8877 test results. (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Thu, 14 Sep 2000 19:07:09 -0400; How does an insulator take on a negative potential? In the Bohr model of an atom, a central nucleus containing neutrons and postively-charged protons is surrounded by orbiting negatively-charged ele; /archives//html/Amps/2000-09/msg00728.html (9,651 bytes)
10. [AMPS] 8877 test results. (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Thu, 14 Sep 2000 23:28:10 -0400; H20 is not an atom - its a molecule composed of three atoms. Even so, its net charge is 0; water molecules are not deflected by electric or magnetic fields. Your description applies more to quarks t; /archives//html/Amps/2000-09/msg00742.html (11,197 bytes)
11. [AMPS] Rf models (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Thu, 14 Sep 2000 23:53:58 -0400; Thanks, John. Unfortunately, that URL references a restricted system. If you could provide a few references to inductor modeling techniques, it'd be greatly appreciated. 73, Dave, AA6YQ To: <amps@con; /archives//html/Amps/2000-09/msg00743.html (9,753 bytes)
12. [AMPS] Fw: censorship, bad news time (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Sat, 16 Sep 2000 02:54:23 -0400; Lets review an important principle of logic: 1. suppose that conditions A, B, and C all imply condition D example: - getting booted from the mailing list implies that one's posts will not be remaile; /archives//html/Amps/2000-09/msg00801.html (8,741 bytes)
13. [AMPS] AL-1200, AL-1500, OR? (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Tue, 8 Feb 2000 23:23:27 -0500; I chose the AL1200 for its instant-on and robust tube. I've encountered zero problems during the past year operation with 3 different Icom transceivers. Extended full-power RTTY operation has reveale; /archives//html/Amps/2000-02/msg00142.html (9,090 bytes)
14. [AMPS] IMD & Phase noise (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Wed, 2 Jun 1999 22:29:43 -0400; Regarding the 775's spur: Icom America recently gave me a full refund on a 3.5 year old 775 after admitting that they could not (or would not) correct this problem without disabling QSK above 20 wpm.; /archives//html/Amps/1999-06/msg00073.html (10,987 bytes)
15. [AMPS] IMD & Phase noise (score: 1): Author: dhb@mediaone.net (Dave, AA6YQ); Date: Thu, 3 Jun 1999 19:48:54 -0400; Icom Japan's position is that their engineers are all fully occupied on new designs. When the problem was first discovered -- back in 1996 -- Icom America retrofitted some additional VFO shielding, w; /archives//html/Amps/1999-06/msg00102.html (9,891 bytes)
16. [AMPS] Instant ON.. (score: 1): Author: dhb@mediaone.net (Dave Bernstein); Date: Thu, 18 Mar 1999 22:25:50 -0500; To improve mean-time-to-QRO and avoid tape on the front of my amplifier and tuner, I added support for "frequency-dependent devices" to my transceiver control software. I recorded the setting-vs-freq; /archives//html/Amps/1999-03/msg00455.html (10,337 bytes)
17. [AMPS] SB 200 on 160 (score: 1): Author: dhb@mediaone.net (Dave Bernstein); Date: Fri, 25 Sep 1998 23:09:08 -0400; Anyone have a scan of this article? If so, I'd appreciate a copy. Thanks in advance... Dave, AA6YQ -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative; /archives//html/Amps/1998-09/msg00270.html (9,237 bytes)

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