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1. [Amps] History of AMPS (score: 1): Author: R L Measures <r@somis.org>; Date: Mon, 4 Sep 2006 02:40:01 -0700; Tnx R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-09/msg00088.html (6,151 bytes)
2. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Sun, 3 Sep 2006 11:03:20 -0700; XL = XC isn't rigorous enough on your side of the pond? R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://lists; /archives//html/Amps/2006-09/msg00063.html (9,186 bytes)
3. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Sun, 3 Sep 2006 04:59:35 -0700; Not according to a dipmeter. For example, when a lo-pass configuration Pi-network with a Q of 10 is tuned up, a dipmeter shows that it is resonant about 7% lower in frequency. If an L-network was res; /archives//html/Amps/2006-09/msg00062.html (9,381 bytes)
4. Re: [Amps] Pi-L values (score: 1): Author: R L Measures <r@somis.org>; Date: Sat, 2 Sep 2006 05:00:04 -0700; As they should be with a 50W rated resistor. cheers, Ken R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://list; /archives//html/Amps/2006-09/msg00050.html (8,086 bytes)
5. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Sat, 2 Sep 2006 04:57:58 -0700; Steve -- There are two resonant circuits in the output circuitry, one HF and one VHF. The HF (near)*-resonant part has a broad, shallow dip. The VHF part has a sharp, deep dip that can suck a dipmete; /archives//html/Amps/2006-09/msg00049.html (12,070 bytes)
6. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Fri, 1 Sep 2006 16:36:44 -0700; And you were able to see the HF fundamental signal at the anodes. R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps mailing list Amps@contesting.com ht; /archives//html/Amps/2006-09/msg00027.html (9,765 bytes)
7. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Fri, 1 Sep 2006 04:21:32 -0700; From the early history of radio, we know that there were transmitters that generated over 1kW of RF -- and that it came about by using interrupted DC to ring a tuned circuit. R L MEASURES, AG6K. 805-; /archives//html/Amps/2006-09/msg00015.html (8,524 bytes)
8. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Fri, 1 Sep 2006 04:13:29 -0700; You were looking in the wrong part of the spectrum. R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://lists.con; /archives//html/Amps/2006-09/msg00014.html (10,142 bytes)
9. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Thu, 31 Aug 2006 20:46:54 -0700; ¿You found the driving signal, but you applied no driving signal? Please describe the coupling method to the S.A. R L MEASURES, AG6K. 805-386-3734 r@somis.org _________________________________; /archives//html/Amps/2006-09/msg00000.html (8,806 bytes)
10. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Wed, 30 Aug 2006 08:13:40 -0700; During the Grate Parasitics Debate in 1996, a member of the audience hauled his SB-220 to work and loosely coupled the anodes to a HP spectrum analyzer. When the 220 was keyed, he observed damped-wav; /archives//html/Amps/2006-08/msg00832.html (11,893 bytes)
11. Re: [Amps] Question about TPTG oscillators (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 29 Aug 2006 23:18:07 -0700; A 3-500Z's grid resonance is c. 88MHz. I know of no 3-500Z amplifier that has oscillated below 95MHz. R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps; /archives//html/Amps/2006-08/msg00831.html (8,462 bytes)
12. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 29 Aug 2006 22:58:04 -0700; I had trouble getting mine to play on 10m. Did the 813 have a metal anode or a carbon anode? R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps mailing; /archives//html/Amps/2006-08/msg00830.html (10,257 bytes)
13. Re: [Amps] TL-922 question (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 29 Aug 2006 22:33:29 -0700; Agreed, Peter. The "Plywood Box" amplifier melted several droplets of silver solder out of a 200pF, 7500wv doorknob cap, but that was not a typical case. R L MEASURES, AG6K. 805-386-3734 r@somis.org; /archives//html/Amps/2006-08/msg00829.html (9,429 bytes)
14. Re: [Amps] TL-922 question (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 29 Aug 2006 22:14:54 -0700; Indeed, Tom. Bad blockers are shorted because the dielectric punches through. In my TL-922, there is enough C to reach 3.5MHz and 1.8MHz when the amplifier is driven with 120w. ... R L MEASURES, AG6K; /archives//html/Amps/2006-08/msg00828.html (9,776 bytes)
15. Re: [Amps] TL-922 question (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 29 Aug 2006 03:47:38 -0700; If a Load C shorts, nothing gets through the tank. Since there is output, the switch that is in series with the Load C must be open. . I don't think this will be found to be the case. R L MEASURES, A; /archives//html/Amps/2006-08/msg00768.html (7,881 bytes)
16. Re: [Amps] TL-922 question (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 29 Aug 2006 03:08:30 -0700; In my experiences, they don't open, they short because the dielectric punches through. R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps mailing list A; /archives//html/Amps/2006-08/msg00767.html (8,065 bytes)
17. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 29 Aug 2006 02:51:22 -0700; Any change in current causes a resonant circuit to ring. Ringing amplitude depends on how fast the current changes and on Q. Faster and more Q =s more V. I have heard from more than a few TL-922 owne; /archives//html/Amps/2006-08/msg00766.html (9,965 bytes)
18. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 29 Aug 2006 02:42:51 -0700; What is the reactance of C-feedback in an 8877 at 500MHz? Not everything we did in the 1950s was well thought out, Peter. To see it, one converts the R/L suppressor's series R to Rp, its parallel-equ; /archives//html/Amps/2006-08/msg00765.html (10,186 bytes)
19. Re: [Amps] TL-922 question (score: 1): Author: R L Measures <r@somis.org>; Date: Tue, 29 Aug 2006 02:08:33 -0700; If the Load-C is at max, the bandswitch probably has some paddersection contacts that evaporated. It is more important to limit peak-current with a glitch-R than to fuse the HV. In the event of overl; /archives//html/Amps/2006-08/msg00764.html (9,761 bytes)
20. Re: [Amps] Parasitics & Filament Sag (score: 1): Author: R L Measures <r@somis.org>; Date: Mon, 28 Aug 2006 20:27:12 -0700; L-supp is the inductive branch of an L/R suppressor. R L MEASURES, AG6K. 805-386-3734 r@somis.org _______________________________________________ Amps mailing list Amps@contesting.com http://lists.co; /archives//html/Amps/2006-08/msg00753.html (8,461 bytes)

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