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21. [Amps] red anodes! (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Fri, 8 Nov 2002 08:27:13 -0700; 2500 x 0.4 = 1 kW input! So what was the RF output that you got? You only referred to the 100 w of drive in your note. Did you calculate and match the plate loadline for this tube in your Swan? K5PRO; /archives//html/Amps/2002-11/msg00126.html (7,033 bytes)
22. [Amps] the mystery amp found a home (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Fri, 8 Nov 2002 09:18:59 -0700; I picked up the Harris RF103 kW amplifier last night, for $100. Took 4 men to lift it into the pickup, and later I put a ramp from tailgate directly into the shed, roller 'er into position for inspec; /archives//html/Amps/2002-11/msg00130.html (6,711 bytes)
23. [Amps] RF power labs (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Tue, 12 Nov 2002 10:35:00 -0700; RF power labs was Frank Kalmus other company. After he died, company disappeared I think. But Kalmus Engineering, the original company making RF amps, was bought out by Amplifier Research. You might; /archives//html/Amps/2002-11/msg00189.html (6,897 bytes)
24. [Amps] 8877 dissp (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Wed, 13 Nov 2002 08:14:55 -0700; Yes, as pointed out by others, plate dissipation is only that electrode dissipation. And for 70% efficient amp in class B or C for FM service, it is only 1100 watts or so. But that leaves little marg; /archives//html/Amps/2002-11/msg00205.html (9,561 bytes)
25. [Amps] 8877 Q's (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Wed, 13 Nov 2002 18:22:27 -0700; Mark Most of what you ask should really be asked of the manufacturer. They can direct you for industrial applications where you need to switch on and off. This is done in many types of processes, but; /archives//html/Amps/2002-11/msg00217.html (8,944 bytes)
26. [Amps] more on the HFS1000G RFPP amplifier (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Mon, 18 Nov 2002 10:51:05 -0700; I have the RFPP HF1000G amplifier purring along here, in daily operation now. It was a very good find and I am quite impressed with the ruggedness of the componentry and general spaciousness of the R; /archives//html/Amps/2002-11/msg00311.html (13,816 bytes)
27. [Amps] more on the HFS1000G RFPP amplifier (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Mon, 18 Nov 2002 12:03:33 -0700; Certainly a consideration. If I build another one of those, I would want to get a custom choke made, like I did in 1983. And capacitor. I had a pair of polypropylene dielectric 0.97 uf 2500 VAC units; /archives//html/Amps/2002-11/msg00314.html (8,065 bytes)
28. [Amps] commerical mfr of electrolytic cap banks (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Mon, 25 Nov 2002 11:09:35 -0700; Electrocube has bought the Seacor capacitor line. They are offering readily built series electrolytic capacitor banks for HV applications, all matched and with the bleeder/equalizer resistances. http; /archives//html/Amps/2002-11/msg00368.html (6,660 bytes)
29. [Amps] Johnson Thunderbolt (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Sun, 6 Oct 2002 11:31:23 -0600; I posted part of this to the AM bulletin board last week; thought it was appropiate for Amplifier reflector too: I just lit off a Johnson Thunderbolt that has been sitting in storage for at least 20; /archives//html/Amps/2002-10/msg00044.html (9,165 bytes)
30. [Amps] voltage multiplier shown (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Tue, 15 Oct 2002 10:50:40 -0600; We use a voltage multiplier to get about 700 kV DC at work. Its large, about the size of a small cottage. To get around using 60 Hz iron, we drive it with audio around 5 - 10 KHz, and do the conversi; /archives//html/Amps/2002-10/msg00142.html (7,968 bytes)
31. [Amps] 8877 RF generator info needed (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Thu, 24 Oct 2002 14:37:40 -0600; Hello all, I need a manual and/or schematic of an RF generator (13.56 MHz Xtal controlled, MOPA) made by RF Plasma Products, also called RF Power Products, and also Plasmatherm I believe. The company; /archives//html/Amps/2002-10/msg00251.html (7,269 bytes)
32. [Amps] Collins 830D q&A (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Fri, 25 Oct 2002 12:17:07 -0600; 6 things to recommend, Jack: 1) Could the output connection to antenna or load be loose or broken, i.e., the tube is running unloaded? In this case, the screen current would be wacko, but would also; /archives//html/Amps/2002-10/msg00269.html (9,525 bytes)
33. [Amps] Collins 830D q&A (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Fri, 25 Oct 2002 12:28:31 -0600; I was able to get in to the broadcasters group on the web now, and the place is the general discussion group for professional broadcasters. I have had luck posting old transmitter questions there in; /archives//html/Amps/2002-10/msg00270.html (6,511 bytes)
34. [Amps] RF screen current (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Tue, 24 Sep 2002 11:21:26 -0600; The question was: .... The short answer is: Absolutely, the limitation at high power/frequency with tubes becomes the screen dissipation. If the transit time effects are not a limit first. These days; /archives//html/Amps/2002-09/msg00229.html (9,477 bytes)
35. [Amps] more parasitic talk (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Mon, 5 Aug 2002 09:55:06 -0600; Tom, W8JI, did a nice job explaining the parasitic suppressors concept for power tubes. These things apply in tubes where the inductance, capacitance of leads and elements are quantified and measurab; /archives//html/Amps/2002-08/msg00072.html (8,717 bytes)
36. [Amps] rocky point effect, barnacle bill (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Fri, 23 Aug 2002 15:17:52 -0600; It is unfortunate that bandwidth is wasted going over and over this subject; some (one?) here don't seem to pay attention to the evidence of effects in vacuum tubes, instead insisting on theories sup; /archives//html/Amps/2002-08/msg00239.html (11,049 bytes)
37. [Amps] suppressors [TSPA] (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Fri, 19 Jul 2002 10:59:58 -0600; The Broadcast Electronics tetrode-based FM broadcast transmitters almost all used Nichrome wire in various parasite killers. There was a patent issued in early 1980s to them for a particular arrangem; /archives//html/Amps/2002-07/msg00327.html (8,489 bytes)
38. [Amps] ceramic caps, and 1kW power sampler/atten (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Thu, 23 May 2002 09:21:33 -0600; I agree about the lousy tempco of high value ceramics. I have 22 x 2000 pf Draloric 5 kV ceramic pancake style caps on a 1 MHz cavity I am designing right now. The caps have N2200 coefficient, but we; /archives//html/Amps/2002-05/msg00384.html (7,301 bytes)
39. [Amps] ceramic caps (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 27 May 2002 13:58:54 -0600; Draloric (Germany), and Morgan Electroceramics/Unilator Division (UK) are a couple of good manufacturers. I have used Draloric for years with RF heaters, amplifiers, transmitter cavities, mostly for; /archives//html/Amps/2002-05/msg00451.html (7,311 bytes)
40. [Amps] 4-400G (score: 1): Author: jtml@lanl.gov (John T. M. Lyles); Date: Mon, 8 Apr 2002 10:37:28 -0600; I saw a RCA 1 kW broadcast TX last week that was running new Amperex 4-400's that were graphite plate, without the fins that are on the Eimac/Triton style (that look like 3-500Z plates). The plates w; /archives//html/Amps/2002-04/msg00240.html (7,046 bytes)

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