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1. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: JimMoci@aol.com (JimMoci@aol.com); Date: Tue, 8 May 2001 22:22:52 EDT; Hello Gentleman, Thanks for all the advice on the 3by1 amp. I will be trying many of the ideas mentioned this weekend and will pass the results on to the reflector. I will be borrowing a spectrum ana; /archives//html/Amps/2001-05/msg00129.html (11,520 bytes)
2. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 9 May 2001 05:17:25 -0400; Is there an antenna relay? What type? BTW, you get a lower impedance driving the filament if you split the two .01 capacitors to a common point and feed it there, instead of having one across the fi; /archives//html/Amps/2001-05/msg00132.html (10,876 bytes)
3. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Wed, 9 May 2001 12:40:34 +0100; For amps that use a significant run of coax between the input picircuits and the socket, the coax must act as a high-impedance quarterwave stub at some VHF frequency, because it's shorted at the othe; /archives//html/Amps/2001-05/msg00133.html (9,816 bytes)
4. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: 2@vc.net (measures); Date: Wed, 9 May 2001 04:58:37 -0700; ? Mr. Rauch: Is a parallel resonant circuit a low pass filter? cheers - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contest; /archives//html/Amps/2001-05/msg00134.html (9,561 bytes)
5. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Wed, 9 May 2001 20:08:25 -0400; So much for the "magic" of nichrome. The anode is loaded with nichrome, and it is oscillating. Might be a good idea, this doesn't usually change stability much because the feedback mostly involves th; /archives//html/Amps/2001-05/msg00145.html (10,434 bytes)
6. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: 2@vc.net (measures); Date: Wed, 9 May 2001 19:36:19 -0700; ? The only person who claims any magic for nichrome (Ni Cr) alloy resistance wire is none other than Mr. Rauch. He insists that the resistance of Ni Cr increases as frequency decreases. (sic) I know; /archives//html/Amps/2001-05/msg00149.html (11,084 bytes)
7. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: na9d@speakeasy.net (Jon Ogden); Date: Thu, 10 May 2001 00:33:38 -0500; These R-C networks on the filaments do help. They stopped an oscillation for my amplifier. One person suggested though that they may have helped to stop an LF or HF oscillation rather than a VHF one.; /archives//html/Amps/2001-05/msg00151.html (10,084 bytes)
8. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: 2@vc.net (measures); Date: Thu, 10 May 2001 00:31:11 -0700; ? They could not possibly have much effect at HF because the damper's capacitor is self resonant at c. 190MHz. cheers, Jon. - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http:/; /archives//html/Amps/2001-05/msg00152.html (9,719 bytes)
9. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: Ian White, G3SEK" <g3sek@ifwtech.com (Ian White, G3SEK); Date: Thu, 10 May 2001 07:35:38 +0100; That's surely true! May be worth trying, then... Agreed. Picking up Rich's point, adding or removing the covers is definitely going to make some changes in the current distribution inside the enclosu; /archives//html/Amps/2001-05/msg00154.html (11,973 bytes)
10. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: Wt8r@aol.com (Wt8r@aol.com); Date: Thu, 10 May 2001 10:06:40 EDT; provide to I've that start It's affects =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D I can see that there is a great deal of real engineering going; /archives//html/Amps/2001-05/msg00156.html (11,772 bytes)
11. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 10 May 2001 17:26:29 +0200; affects A human beeing with his diseases is thousand times more complex and critical than an amplifier althoug both can be ill. While experimenting with a human beeing has moral implications because; /archives//html/Amps/2001-05/msg00157.html (10,313 bytes)
12. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: 2@vc.net (measures); Date: Thu, 10 May 2001 09:08:25 -0700; ? Does the amount of feedback-C inside the tube really matter? ? I have a TL-922 with resistance-wire suppressors that takes-off roughly every 500-hours for no obvious reason. My guess is that it is; /archives//html/Amps/2001-05/msg00158.html (13,676 bytes)
13. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Thu, 10 May 2001 09:52:27 -0700; "A socket, a wiring and a layout that works for VHF (in a similar configuration, i.e. Gg and PI) is generally quite stable at lower frequencies as HF. Shielding of input and output, avoiding long wir; /archives//html/Amps/2001-05/msg00159.html (10,457 bytes)
14. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 10 May 2001 14:27:34 -0400; I'm certainly glad Jon reminded you of that important point. Don't feel bad, many people miss that point besides you Dave. 73, Tom W8JI W8JI@contesting.com -- FAQ on WWW: http://www.contesting.com/F; /archives//html/Amps/2001-05/msg00160.html (9,574 bytes)
15. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 10 May 2001 14:27:34 -0400; Gain in a 6AK5 grounded cathode amplifier is much higher than a typical GG amplifier. Isolation of input and output is more important when gain is higher. The problems with oscillations in a power a; /archives//html/Amps/2001-05/msg00161.html (11,486 bytes)
16. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: Wt8r@aol.com (Wt8r@aol.com); Date: Thu, 10 May 2001 16:01:00 EDT; Tom, All I can say is "Thank You" to you and Jon for your contributions to the Amps reflector. Maybe you can explain "side affects". 73 de Dave, WT8R -- FAQ on WWW: http://www.contesting.com/FAQ/amps; /archives//html/Amps/2001-05/msg00163.html (10,280 bytes)
17. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: 2@vc.net (measures); Date: Thu, 10 May 2001 14:38:28 -0700; ? amen, Mr. Rauch. As I understand it, the 3-1000z has a not-optimal grid design that can be detected by visual inspection, 0.8 pF of feedback is a bunch. ? indeed. ... ... cheers - Rich..., 805.386; /archives//html/Amps/2001-05/msg00165.html (9,584 bytes)
18. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: bogus@does.not.exist.com (Jon Ogden); Date: Thu, 10 May 2001 15:22 -0700; Dave, Your solution to the original problem would be? Since it is painfully obvious to you that I am a moron or an idiot (been called both by you) and since I should crawl under the rock that has bee; /archives//html/Amps/2001-05/msg00168.html (11,547 bytes)
19. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: W8JI@contesting.com (Tom Rauch); Date: Thu, 10 May 2001 20:03:14 -0400; Hi Dave, Thank you very much, but you give me too much credit. I think Jon has his own opinions. You're welcome. Side "affects" of what? I guess I missed your question. 73, Tom W8JI W8JI@contesting.c; /archives//html/Amps/2001-05/msg00172.html (9,583 bytes)
20. [AMPS] UPDATE ON 3-1000Z OSCILLATION (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 10 May 2001 15:19:24 +0100; Read Dilbert - where you can see the reflection of management doing that all the time! It's done even more by politicians - of whatever party/nationality/race/creed etc. 73 Peter G3RZP -- FAQ on WWW:; /archives//html/Amps/2001-05/msg00175.html (9,437 bytes)

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