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241. [AMPS] ssr's in qro amps (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Tue, 27 Jun 2000 11:59:56 EDT; time. Hi Peter They generally fail shorted... if they open, it is because they are broken! :-) I understand a stuck relay but, I dislike melted sand. I've shied away from using them myself for the HV; /archives//html/Amps/2000-06/msg00438.html (10,703 bytes)
242. [AMPS] High prices and reality. (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 01 May 2000 12:27:30 EDT; On Sun, 30 Apr 2000 22:09:55 +0100 "Bob Duckworth" <wb4mnf@atl.org> writes: Yes, but what do you with her later? I don't recall at this moment who it was (perhaps Cary Grant?) who quipped, "I don't p; /archives//html/Amps/2000-05/msg00005.html (7,531 bytes)
243. [AMPS] 31LQ6 (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 01 May 2000 12:27:30 EDT; On Mon, 01 May 2000 17:54:45 +0800 Alek Petkovic <vk6apk@eon.net.au> writes: GLA-1000 6LQ6 parallel. Hi Alek, Yes, that's the way it works -- should be right around 500 mA per tube. The 31's also hav; /archives//html/Amps/2000-05/msg00006.html (8,088 bytes)
244. [AMPS] ?: PTC-205 diode specs (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Wed, 19 Apr 2000 12:20:12 EDT; Does anyone happen to have a reference listing the specifications for a PTC-205 diode? I suspect the manufacturer was Hughes semiconductor... a long, long time ago, in a place very close by me... :-); /archives//html/Amps/2000-04/msg00109.html (7,117 bytes)
245. [AMPS] Copper tube - semi-rigid (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Fri, 28 Apr 2000 15:57:43 EDT; On Fri, 28 Apr 2000 17:11:57 +0100 Mark Marsden <MM@plextek.co.uk> writes: Hi Mark, Micro Coax makes a wide assortment of .141 diameter semirigid cable in 20-25 foot lengths. Their UK rep. is: Rosenb; /archives//html/Amps/2000-04/msg00182.html (8,990 bytes)
246. [AMPS] FS: Old Manuals (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Fri, 03 Mar 2000 13:47:23 EST; There isn't one amplifier in the bunch but, there are some which could be used in conjunction with amps! ** Vintage Electronic Manuals (original unless noted) ** Army / Airforce / Navy AN/APS-13 Airb; /archives//html/Amps/2000-03/msg00112.html (11,683 bytes)
247. [AMPS] Chokes (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 12 Mar 2000 12:41:42 EST; A data point for the choke discussion: An article by Bill Deane in "73 Magazine", September 1969, p. 147 describes a 90 uH choke with a (first) resonance at 43 Mhz. The cogent details, to save every; /archives//html/Amps/2000-03/msg00603.html (8,653 bytes)
248. [AMPS] Chokes (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 12 Mar 2000 21:19:20 EST; Hi Rich, use. . The winding used, in the cited example, calculates to be approx.12uH without the ferrite core. This gives an effective permeability of about 7½ for the core, and while the arti; /archives//html/Amps/2000-03/msg00612.html (9,887 bytes)
249. [AMPS] Chokes (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sun, 12 Mar 2000 21:19:20 EST; On Sun, 12 Mar 2000 12:50:22 -0600 "Phil Clements" <philk5pc@tyler.net> writes: Hi Phil, interesting. their Your posting likely predates my "membership" in this group. I was aware of the B&W's but, c; /archives//html/Amps/2000-03/msg00613.html (10,046 bytes)
250. SV: [AMPS]Plate choke at the antenna end instead? (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 13 Mar 2000 12:10:16 EST; Hi Hans & Peter antenna resonance discussion caps them. to There is an article by Wayne Cooper in 73 Magazine, August 1965, pp. 18-21 which shows that connection in a small KW amp. The author apparen; /archives//html/Amps/2000-03/msg00634.html (14,167 bytes)
251. [AMPS] Chokes (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 13 Mar 2000 13:23:54 EST; On Mon, 13 Mar 2000 10:21:47 -0500 "Tom Rauch" <w8ji@contesting.com> writes: Hi Tom, Yes, which certainly disqualifies them for a hi power resonant circuit. The article described a loosely coupled no; /archives//html/Amps/2000-03/msg00637.html (9,708 bytes)
252. [AMPS] Chokes (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Tue, 14 Mar 2000 12:17:36 EST; On Tue, 14 Mar 2000 08:14:38 -0500 "Tom Rauch" <w8ji@contesting.com> writes: Hi Tom, No but, it does leave a lot of latitude... My Fair-Rite catalog (13th ed. p. 10) shows about a Q of 85 at 10 MHz,; /archives//html/Amps/2000-03/msg00670.html (10,877 bytes)
253. [AMPS] HV rectifier for 4-400 amplifier (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Tue, 14 Mar 2000 12:30:15 EST; Hi Piotr, FInally, some good diodes!!! Yep, that's what they are made for ... No need. Avalanche diodes are "self-protecting" against the effects that required those parts. 73, Marv WC6W * __________; /archives//html/Amps/2000-03/msg00671.html (8,281 bytes)
254. [AMPS] Books (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Sat, 18 Mar 2000 13:11:22 EST; their like interested Hi Carl, The title you seek is "SIngle Sideband Systems & Circuits", 1964 authored along with Bruene & Schoenike. There is also a 2nd and a 3rd edition, the latter I believe is; /archives//html/Amps/2000-03/msg00807.html (8,914 bytes)
255. [AMPS] Re: New G2DAF amplifier information (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Mon, 20 Mar 2000 13:41:36 EST; described OA-1448(XW-1)/GRT -- There is a photo of it on page 115A of the same IRE. A bit more involved than the DAF amp. :-) 73, Marv WC6W * _________________________________________________________; /archives//html/Amps/2000-03/msg00841.html (9,890 bytes)
256. [AMPS] FS: Tube Sockets (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Fri, 24 Mar 2000 23:52:05 EST; "Ring" style 4 pin sockets with a small metal post similar to Johnson 122-234, fit 5D21, 705A, 715A/B (per the Johnson catalog) used $5 ea Johnson 124-0311 11 pin sockets (for 8072, 8121, 8122, 3CX40; /archives//html/Amps/2000-03/msg00935.html (7,630 bytes)
257. [AMPS] FS: Vacuum Variables & Fixed Capacitors (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Fri, 24 Mar 2000 23:52:05 EST; ** VACUUM VARIABLES ** Jennings Vacuum Variables -- all used (or at least aged) UCS-300 300pF 7.5KV $75 Front Flange w/mtng foot + gear driven puller UCS-300 300pF 10KV $125 Integral Front Flange + P; /archives//html/Amps/2000-03/msg00936.html (7,762 bytes)
258. [AMPS] FS: Coils, Chokes, Capacitors, Cabinet (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Fri, 24 Mar 2000 23:52:05 EST; 55 uH silver plated edge wound .200 x .05 buss wire. 5" diameter by 10" long overall $40 20uH plated #14 wire on 2½" ceramic form; aged but unused $10 ea. Hammarlund NZ-10 Neutralizing capacit; /archives//html/Amps/2000-03/msg00937.html (8,105 bytes)
259. [AMPS] FS: Power Tubes & others (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Fri, 24 Mar 2000 23:52:05 EST; ** POWER TUBES ** 450TH Eimac -- These are pulls and spares from a working estate amp. $100 ea 7580W/4CX250R (Eimac / Amperex) pulls $25 ea --or-- 5 for $100 7204/4CX250F used tested good $20 ea 8621; /archives//html/Amps/2000-03/msg00938.html (8,664 bytes)
260. [AMPS] 3/2 power law and Rich's very wide signal (score: 1): Author: wc6w@juno.com (Radio WC6W); Date: Tue, 28 Mar 2000 16:34:42 EST; On Tue, 28 Mar 2000 12:46:32 -0800 "Colin Lamb" <k7fm@teleport.com> writes: recommend front step"? Northrup left the tail off altogether, though lacking adequate stabilization computers nor an ongoin; /archives//html/Amps/2000-03/msg01022.html (9,967 bytes)

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