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321. [AMPS] resistors (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Thu, 25 Feb 1999 00:36:00 EST; Just a comment on the bleeder thread... er... string I employ a series-parallel configuration in my amplifier power supply. The individual resistors are run at about 25% of their ratings. In the unli; /archives//html/Amps/1999-02/msg00665.html (9,098 bytes)
322. [AMPS] HV Power Supply for 3-500Z (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Thu, 25 Feb 1999 00:36:00 EST; HI Jer, Use a different transformer! :-) As noted by Rich, Dave and the UTC catalog the center tap of the S-47 is designed to be operated at ground potential. That transformer is also only rated at; /archives//html/Amps/1999-02/msg00666.html (8,784 bytes)
323. [AMPS] Class E (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 03 Jan 1999 13:31:34 EST; Hi, everyone! Does anyone know of a timely reference on Class E RF amplifiers? All I can seem to find are: The 1997 May-June QST article using a non-optimum FET... and vastly exceeding the current ra; /archives//html/Amps/1999-01/msg00041.html (8,258 bytes)
324. [AMPS] Dollars per dB (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 03 Jan 1999 13:31:34 EST; Happy New Year! to all, I just read through the year end $/dB scenario and can't resist putting my Suzie B's worth in on this one... FIrst of all... if this discussion is at all germane... shouldn't; /archives//html/Amps/1999-01/msg00042.html (9,805 bytes)
325. [AMPS] Henry Roller Coil (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Thu, 07 Jan 1999 23:57:55 EST; material, somewhere The small (3 & 5 amp) Johnson 229 series use the ceramic form construction with round wire. The larger Johnson coils use edge wound ribbon or even copper tubing. If I recall corr; /archives//html/Amps/1999-01/msg00108.html (8,131 bytes)
326. [AMPS] Triode conected Tetrodes (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 25 Jan 1999 12:39:06 EST; Hi Art, The article seems to have survived into the 1980 edition. That table covers different plate impedances depending on plate voltage; not specific to any tube type. The 4-1000 may be triode conn; /archives//html/Amps/1999-01/msg00383.html (9,349 bytes)
327. [AMPS] Eimac Power Pentode. (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Tue, 26 Jan 1999 17:51:19 EST; On Tue, 26 Jan 1999 21:58:03 +0200 "Eric" <eric.mawhinney@usa.net> writes: (snip) brew Hi Eric, That is a cute "little" tube. You can review the specs at: http://www.SignalONE.com/vactubes/eimac/tube; /archives//html/Amps/1999-01/msg00422.html (8,206 bytes)
328. [AMPS] grid termination resistor value? (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Thu, 28 Jan 1999 01:30:14 EST; On Wed, 27 Jan 1999 22:32:49 EST Skip S Isaham <nospam4me@juno.com> writes: networks. Hi Skipp, I guess the best answer is that it is done for convenience... considering the available drive power fro; /archives//html/Amps/1999-01/msg00516.html (9,373 bytes)
329. [AMPS] AM-912/TRC (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 31 Jan 1999 13:07:43 EST; Happy Sunday everyone, An interesting power amplifier just popped out of the "time closet". It is an AM-912/TRC with a frequency range of 100-225 MC; love those old units! :-) The amp utilizes a 4X15; /archives//html/Amps/1999-01/msg00661.html (7,573 bytes)
330. [AMPS] HV Switching Supply (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 31 Jan 1999 13:56:53 EST; Hi Carl, A worthy project. PFC Boost input topology I presume? Provision for soft-start?? H Bridge? FET's or IGBT's?? What switching frequency??? Output protection? SInce the output capacitor is some; /archives//html/Amps/1999-01/msg00664.html (8,264 bytes)
331. [AMPS] restoring/replating (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 28 Dec 1998 00:11:56 EST; (snip) stuff Yes, a pure silver (999+ fine) anode is required. A little "ingot" should be easy to come by at your local coin/investment shop with the price of silver down at $5/oz. One nice thing is; /archives//html/Amps/1998-12/msg00436.html (9,200 bytes)
332. [AMPS] restoring/replating (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 28 Dec 1998 23:07:47 EST; stuff back. the solutions Hi Phil, I had a friend in the Jewelry biz a long time ago and most of what I know of this process I learned from him. He also did my plating... so I didn't have to get my; /archives//html/Amps/1998-12/msg00460.html (9,721 bytes)
333. [AMPS] How to build the ultimate HF amplifier ? (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 02 Nov 1998 14:01:23 EST; On Mon, 02 Nov 1998 05:18:12 EST wb8jkr@juno.com (Mark S Graalman) writes: Break... Break... The article is in March 1972 Ham Radio pp.6-15. It is actually not as absurd as it might seem in dim memor; /archives//html/Amps/1998-11/msg00044.html (9,170 bytes)
334. [AMPS] FS: 4CW100000D & accessories (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Tue, 03 Nov 1998 11:32:37 EST; Good Morning (or whatever is appropriate) everyone! This item may be of interest to someone on the group: For Sale: used Eimac 4CW100000D (yes, that is the correct number of 000's) with Socket mounte; /archives//html/Amps/1998-11/msg00056.html (7,815 bytes)
335. [AMPS] #22 Cu wire current capacity (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Wed, 04 Nov 1998 12:28:39 EST; Hmmm, well naturally that would depend on what your definition of the word "minimal" is... :-) 73, Marv WC6W [ Special note: To those of you residing outside the USA, who may not be intimately aware; /archives//html/Amps/1998-11/msg00072.html (7,685 bytes)
336. [AMPS] Screen regulator circuit needed (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Thu, 19 Nov 1998 00:13:55 EST; Hello everyone! I designed a circuit circa 1986 for a screen regulator that has some features which may be of interest in this current discussion. It was designed for a 4CX1500B which operates at sub; /archives//html/Amps/1998-11/msg00268.html (10,172 bytes)
337. [AMPS] ?: 8921 Pinout (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Fri, 16 Oct 1998 18:48:27 EDT; Hello everyone, Would anyone on this list happen to know the pinout for an 8921 (4CX600JA) ? Or an easy way to find it? Thanks in advance & 73, Marv WC6W * ___________________________________________; /archives//html/Amps/1998-10/msg00223.html (7,144 bytes)
338. [AMPS] Re?: 8921 Pinout (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sat, 17 Oct 1998 13:54:11 EDT; is Hi Carl, Nope. I think that the grids may be generally consistent with the rest of the family since pin 1 is in common with the screen ring however, pin 5 has continuity to the key. And there is; /archives//html/Amps/1998-10/msg00235.html (7,776 bytes)
339. [AMPS] FS: Interesting Amplifier (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 18 Oct 1998 15:39:27 EDT; Hughes Kilowatt HF contnuous coverage 2-36 MHz airborne power amplifier, with a single 4CX250 family tube driving four 4CX250 family? finals. One of approximately 200 originally built for the B-58 Hu; /archives//html/Amps/1998-10/msg00262.html (7,565 bytes)
340. [AMPS] FS: Miscellanuous Coils & Capacitors (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 18 Oct 1998 15:39:27 EDT; ** L & C ** 100uH Plate choke, #24 wire. 4.5" slightly spaced winding on 7" long, 1"dia grooved ceramic form. $15 6" long ferrite core filament chokes $10 ea Large (winding about 3.5" x 6") roller co; /archives//html/Amps/1998-10/msg00263.html (7,865 bytes)

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