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References: [ +from:jtml@lanl.gov: 562 ]

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301. [AMPS] RF chokes (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 2 Mar 1998 12:30:34 -0700; Vic, K2VCO, asked about measuring the self resonance(s) in plate chokes. Others mentioned doing the measurement in-situ. I also believe that it must be done in the actual chassis or a model box which; /archives//html/Amps/1998-03/msg00014.html (9,752 bytes)
302. [AMPS] Anode current vs cathode current... (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Tue, 3 Mar 1998 15:15:40 -0700; When putting an ammeter or shunt/voltmeter in the ground (negative) lead of a HV DC supply, remember that this connection can be at a high potential when there is a dump of energy in a sparkover in t; /archives//html/Amps/1998-03/msg00035.html (10,121 bytes)
303. No subject (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Tue, 3 Mar 1998 16:30:20 -0700; Does anyone have any experience with this supplier of electron tubes? Bruckner - Electron Tubes for Industry Rockaway, NJ Their web site: http://www.elexs.com/ -- FAQ on WWW: http://www.contesting.co; /archives//html/Amps/1998-03/msg00039.html (7,377 bytes)
304. [AMPS] Diode-protected meter in neg lead (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Wed, 4 Mar 1998 09:41:46 -0700; This discussion pertains to putting a meter in the negative lead of a HV power supply, to keep the DC HV off the meter. To protect the meter and wiring from the transient overvoltage that could occur; /archives//html/Amps/1998-03/msg00043.html (10,449 bytes)
305. [AMPS] screen emission, primary (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 9 Mar 1998 10:15:56 -0700; AG6K spoke of the primary emission from screen grid of 3CX800A7 due to overheated cathode, with subsequent barium deposition on the gold wire. This certainly is a concern if, as he said, the filament; /archives//html/Amps/1998-03/msg00079.html (8,594 bytes)
306. [AMPS] Blowers for finned tubes (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Tue, 10 Mar 1998 12:02:51 -0700; For finned air cooled tubes, you need to supply the recommended CFM of air volume through the anode fins which will give you a back pressure. Your blower needs to be capable of supplying that CFM, i; /archives//html/Amps/1998-03/msg00153.html (10,792 bytes)
307. [AMPS] burned grid (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Sun, 15 Mar 1998 13:50:12 -0700; I just got back from RCA (now Burle Tubes) in Lancaster, PA. One of our 7835 super power tetrodes (GG, 200 Mhz, 3 MW output pulsed) had a 1/4 inch hole in the grid wires, yet it was still functioning; /archives//html/Amps/1998-03/msg00307.html (6,596 bytes)
308. [AMPS] typical versus Max ratings (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 16 Mar 1998 09:04:27 -0700; I'm sure that this has been discussed and debated before, but here's about 2 cents worth: As for those Eimac "Typical" ratings in the datasheets. I believe that those are normally the result of one o; /archives//html/Amps/1998-03/msg00322.html (8,003 bytes)
309. No subject (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 16 Mar 1998 11:24:11 -0700; Hi, "Do you have any additional data on tubes that are confined to the 500W to 2.5KW useable output range?" Sorry, don't have any info on these. The word MEASURED does seem to indicate that they were; /archives//html/Amps/1998-03/msg00325.html (7,392 bytes)
310. [AMPS] Philips 5868 ? (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Wed, 18 Mar 1998 12:31:50 -0700; Dave, Weeks ago, (2/7/98) Alek Petkovic - VK6APK, asked about using a Siemens RS1016. The Philips/Amperex 5868 is compatible. These tubes are industrial trides, low mu, virtually useless for amateur; /archives//html/Amps/1998-03/msg00344.html (7,758 bytes)
311. [AMPS] Philips 5868 ? (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Wed, 18 Mar 1998 12:39:49 -0700; In my posting, my fingers got ahead of my eyes. No, there isn't a new tube called a tride. It's a TRIODE. Oops. John K5PRO -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@conte; /archives//html/Amps/1998-03/msg00345.html (6,949 bytes)
312. [AMPS] Philips 5868 ? (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Wed, 18 Mar 1998 14:14:42 -0700; They'd probably be fine for the modulators in a class B audio P-P curcuit. They need a grid bias supply to set them idling OK. And probably a good dose of negative feedback around the modulator, like; /archives//html/Amps/1998-03/msg00347.html (7,897 bytes)
313. [AMPS] Capacitor Identification (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 30 Mar 1998 09:17:58 -0700; Jay (W7CW) found these capacitors. They are Murata (now Murata-Erie) ceramic caps, rated for 20 KV DC working voltage. They are 4800 pf (0.0048 uF). Those had a Z5V ceramic dielectric, with a peak in; /archives//html/Amps/1998-03/msg00481.html (8,225 bytes)
314. [AMPS] 6181 tube? (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 30 Mar 1998 09:24:58 -0700; RCA 6181 does not compute. I could not find it in my databooks. The 6166 does, but that's a tetrode rated for TV application, 10 KW dissipation, about 11 inches long, 6 inches diameter, 15 lbs. The 6; /archives//html/Amps/1998-03/msg00482.html (6,832 bytes)
315. [AMPS] don't choke on this (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 30 Mar 1998 17:10:39 -0700; EXAMPLES OF MAKING A PLATE RFC FROM SCRATCH: Got some measurements of various RF chokes - "plate chokes" - that we measured with the HP 4193A vector impedance meter last winter. We only measured at t; /archives//html/Amps/1998-03/msg00491.html (12,254 bytes)
316. [AMPS] Capacitor Identification (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Tue, 31 Mar 1998 10:08:19 -0700; Jay, We had a bunch of the 0.02 uF 20 KV made exactly the same by Murata. They were mounted in series/parallel, across the center tap of the push pull output transformer for a 2-6 MHz amplifier, plat; /archives//html/Amps/1998-03/msg00495.html (9,343 bytes)
317. No subject (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Tue, 31 Mar 1998 12:05:15 -0700; To KM1H and all, I'm not knocking the Measurement 59! I have one at home, and we have 3 working units at work. My boss wanted me to toss them out a month ago, so I shoved them deeper in the cabinet o; /archives//html/Amps/1998-03/msg00498.html (10,599 bytes)
318. [AMPS] resonant choke input (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Fri, 6 Feb 1998 10:37:16 -0700; The Broadcast Electronics FM-3.5A and B 3500 watt FM transmitter (88-108 MHZ, 4CX3500A-based design) uses a resonant choke input filter in the single phase power supply for the plate voltage. I belie; /archives//html/Amps/1998-02/msg00030.html (12,557 bytes)
319. [AMPS] Siemens triodes (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 9 Feb 1998 11:37:52 -0700; To VK6APK, Alek. The RS1016 is a power triode used for industrial RF heaters, dielectric type. The Amperex 5868 is identical. The base on these tubes is SLIGHTLY different than a 3-500Z, enough that; /archives//html/Amps/1998-02/msg00049.html (9,665 bytes)
320. [AMPS] 300 Ohm DL (score: 1): Author: jtml@lanl.gov (John Lyles); Date: Mon, 9 Feb 1998 11:44:38 -0700; Len (K2IVX), Look to old B&W in Bristol, PA (still there) for already made high power resistors for antenna termination. They make a wierd 'folded doublet' antenna that is real flat across the HF ban; /archives//html/Amps/1998-02/msg00050.html (7,250 bytes)

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