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41. Re: [Amps] Maximum RF output in practical application: 4-250A (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Mon, 3 Jul 2006 18:09:04 -0400; I want to strengthen the information that Joe has stated: In the days when telephone calls were sent inter-city by microwave, those signals were in the form of single-sideband signal frequency-modula; /archives//html/Amps/2006-07/msg00145.html (13,011 bytes)
42. Re: [Amps] Maximum RF output in practical application: 4-250A (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Mon, 3 Jul 2006 22:05:14 -0400; And when the bands are crowded the receivers must be made narrow. And then, as I pointed out, it is impossible to have a wideband system because the receiver is a part of that system. And remember th; /archives//html/Amps/2006-07/msg00159.html (11,150 bytes)
43. Re: [Amps] New SGC Mini Lini Uses Class E Technology (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Wed, 5 Jul 2006 12:32:02 -0400; Bill wrote about the SGC MiniLini: I wrote them an e-mail asking how they were going to delay the RF channel to equal the delay in the post-modulator lowpass and got a reply which didn't answer the q; /archives//html/Amps/2006-07/msg00225.html (8,008 bytes)
44. Re: [Amps] QEX Innovative Tube Linear? (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Sat, 8 Jul 2006 09:40:17 -0400; A wonderful example is the little 6J6 used in the tail-warning radar in WWII. - Jim WB6BLD _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contestin; /archives//html/Amps/2006-07/msg00274.html (8,358 bytes)
45. Re: [Amps] High frequency heater supplies (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Thu, 13 Jul 2006 11:36:19 -0400; If line-frequency (50 Hz or 60 Hz) power can cause a small amount of modulation of the RF output, then I would think 30 kHz could do the same thing. The output signal would then have sidebands at +/-; /archives//html/Amps/2006-07/msg00371.html (7,587 bytes)
46. Re: [Amps] Why mu TSPA (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Thu, 20 Jul 2006 13:58:17 -0400; I think John Lyles' summary is excellent. He goes on to say: This statement is true but the low drop is not a result of low mu but rather of low Rp. For a given Gm a lower-mu tube will have a lower R; /archives//html/Amps/2006-07/msg00685.html (6,936 bytes)
47. Re: [Amps] making sinks black (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Sat, 22 Jul 2006 12:57:06 -0400; I have heard it said that this is largely true at extreme temperatures. Might be nice to have someone dissipate a "real world" amount of power (say 100 watts) in a heat sink of raw aluminum and do it; /archives//html/Amps/2006-07/msg00877.html (7,795 bytes)
48. Re: [Amps] setting the grid adrift (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Wed, 26 Jul 2006 15:50:49 -0400; Guys, this grid thing is getting a tiresome, perhaps out of hand. It is starting to show signs of degeneration. Can't we put it to bed? - Jim WB6BLD _______________________________________________ Am; /archives//html/Amps/2006-07/msg01182.html (9,166 bytes)
49. Re: [Amps] W3NQN High power RF Harmonic filters (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Thu, 27 Jul 2006 10:00:38 -0400; Dick and Craig: Do yourself a favor and see the interactive Windows program to design and analyze filters here: http://tonnesoftware.com/elsie.html Sabin's diplexer lowpass/highpass scheme has been a; /archives//html/Amps/2006-07/msg01216.html (8,455 bytes)
50. Re: [Amps] Flash arcs (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Fri, 28 Jul 2006 10:31:22 -0400; How about emitter, and gate, and collector? :-) - Jim WB6BLD _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2006-07/msg01235.html (7,894 bytes)
51. Re: [Amps] Low Pass Filter capacitor ratings for 1.5kw level (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Tue, 1 Aug 2006 17:08:54 -0400; Same thing, two different ways of saying it, and very true! About time someone wrote an article on the design of a lowpass filter for a single band capable of handling 1500 watts continuously, 50 ohm; /archives//html/Amps/2006-08/msg00014.html (8,400 bytes)
52. Re: [Amps] Low Pass Filter capacitor ratings for 1.5kw level (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Tue, 1 Aug 2006 20:43:14 -0400; About lowpass filters for a 1.5 kW transmitter: It might be advisable, IF you have the potential for TVI, to make a lowpass (or bandpass) filter for the transmitter and then follow it another filter; /archives//html/Amps/2006-08/msg00024.html (8,403 bytes)
53. Re: [Amps] grid resonance (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Sun, 6 Aug 2006 14:18:03 -0400; Nice explanation. Hadn't looked things that way. Thanks! - JimT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amp; /archives//html/Amps/2006-08/msg00222.html (9,363 bytes)
54. Re: [Amps] Checking for IMD (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Fri, 11 Aug 2006 16:43:39 -0400; And Jim is adding: Very true! And if the separation between tones is down below, say, 100 Hz, then the power supply regulation (or lack of same) starts to enter into the picture. To test the RF block; /archives//html/Amps/2006-08/msg00415.html (9,018 bytes)
55. Re: [Amps] Checking for IMD (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Fri, 11 Aug 2006 17:49:40 -0400; My question about "how pure does each tone need to be" . . . How much harmonic distortion can each tone have without affecting measurements? 1% OK? 2%? - JimT ________________________________________; /archives//html/Amps/2006-08/msg00420.html (9,240 bytes)
56. Re: [Amps] Checking for IMD (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Fri, 11 Aug 2006 19:41:15 -0400; Tom: What I meant was how clean (free of harmonic content) does each of a pair of audio tones (sinusoids) need to be if that pair is modulating an SSB transmitter in lieu of a speech signal? If I hav; /archives//html/Amps/2006-08/msg00423.html (9,427 bytes)
57. Re: [Amps] Anodizing aluminum, painting etc. (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Thu, 17 Aug 2006 13:16:14 -0400; I look "mass" (weight) as a time-constant. Bigger sink stays cool longer while it is soaking up heat. But then too it retains that heat for a longer time than a light-weight sink. - JimT ___________; /archives//html/Amps/2006-08/msg00531.html (8,987 bytes)
58. Re: [Amps] Glued meters ! (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Wed, 4 Oct 2006 13:41:40 -0400; About mounting parts to chassis or panel: So have I, as a matter of fact. But the original comment was whether this kind of thing is acceptable on a *commercial* unit. - Jim WB6BLD __________________; /archives//html/Amps/2006-10/msg00022.html (7,042 bytes)
59. Re: [Amps] "10 Meter Ban" to be lifted ... (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Sun, 15 Oct 2006 15:41:12 -0400; About peak versus average or DC: I am fairly sure that such a statement WAS made - but it was for two-tone testing, where you had a pair of sinusoids added to form the modulating signal, continuously; /archives//html/Amps/2006-10/msg00147.html (9,313 bytes)
60. Re: [Amps] "10 Meter Ban" to be lifted ... (score: 1): Author: "Jim Tonne" <tonne@comcast.net>; Date: Mon, 16 Oct 2006 09:42:20 -0400; Correct. [ snip ] That is peak - I mean peak instantaneous as in 50 microsecond charge time for the timing capacitor. This is a whole nuther number when compared to average or RMS. Lengthen that cha; /archives//html/Amps/2006-10/msg00171.html (10,008 bytes)

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