Mail Archive Search: <+from:k7fm@teleport.com>

Results:

References: [ +from:k7fm@teleport.com: 769 ]

Total 769 documents matching your query.

181. [AMPS] Suppress the Suppressors (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sun, 6 Aug 2000 21:08:45 -0700; "Which contact burned? Were you present when the contact burned? /// The above story seems unlikely because tank potential is maximal only when the tank is nearly resonant. As soon as the band switch; /archives//html/Amps/2000-08/msg00137.html (7,887 bytes)
182. [AMPS] Alpha 76A tube change. (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Mon, 7 Aug 2000 13:53:00 -0700; Hi Ed: You are on the right track to change the 3CX800A7 tubes in for the 8874 tubes. I did the same thing. You will need a new pair of chimneys. Two of the 3CX800A7 tubes act like 3 of the 8874 tube; /archives//html/Amps/2000-08/msg00159.html (8,279 bytes)
183. [AMPS] Relays hanging up (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sat, 12 Aug 2000 07:06:53 -0700; The TS-430S sometimes suffered from intermittent receive conditions, due to the failure of the contacts in the receive bandpass filter. The recommended cure was to run a small amount of dc through th; /archives//html/Amps/2000-08/msg00238.html (9,965 bytes)
184. [AMPS] RCA 8916 (score: 1): Author: k7fm@teleport.com (Lamb); Date: Wed, 5 Jul 2000 18:32:41 -0700; Greetings: I found a large RCA 8916 ceramic tube (with handles) hiding among some other equipment, although I do not remember when or where I got it. It has a coaxial base and looks to be in good phy; /archives//html/Amps/2000-07/msg00029.html (6,522 bytes)
185. [AMPS] SB-200 more strange stuff (score: 1): Author: k7fm@teleport.com (Lamb); Date: Fri, 2 Jun 2000 05:56:14 -0700; Hi Stephen: I suspect that the talkback is either the power transformer or the plate meter. Tighten the bolts on the power transformer and either short the meter temporarily or bypass it with an elec; /archives//html/Amps/2000-06/msg00008.html (7,764 bytes)
186. [AMPS] Which one? (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Tue, 13 Jun 2000 11:40:14 -0700; Hi Jim: Interesting question. I probably should answer privately, but it is an interesting point. The Alpha 99 has wonderful protection circuits in it. It is a later version of the 91b. The 4CX800 tu; /archives//html/Amps/2000-06/msg00154.html (7,185 bytes)
187. [AMPS] s meter calibration (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Tue, 13 Jun 2000 16:07:37 -0700; Where does one draw the line on s-meter calibration? It would not be difficult to compensate for all the adjustments and gain variations of the receiver and convert actual microvolts at the antenna i; /archives//html/Amps/2000-06/msg00161.html (10,020 bytes)
188. [AMPS] Talking SB-200 (score: 1): Author: k7fm@teleport.com (Lamb); Date: Wed, 21 Jun 2000 20:50:38 -0700; Hi Stephen: It could be the capacitor as suggested. It also could be the tube. I only think I have heard one tube in 40 years talk back - but perhaps you are lucky enough to have that happen to you.; /archives//html/Amps/2000-06/msg00323.html (7,717 bytes)
189. [AMPS] No training in physics or algebra? (score: 1): Author: k7fm@teleport.com (Lamb); Date: Thu, 22 Jun 2000 05:59:50 -0700; "... incredible, Phil. The designer of the AL-1500, Charles Thomas Rauch, Jun. claimed to be one of our recognized amplifier 'experts' (9-94, QST) -- yet he has no training in physics, physics of ele; /archives//html/Amps/2000-06/msg00328.html (10,861 bytes)
190. [AMPS] ssr's in qro amps (score: 1): Author: k7fm@teleport.com (Lamb); Date: Tue, 27 Jun 2000 06:07:03 -0700; I recall at the age of 15, I grabbed a 1.5 kv (I used qrp in those days), 1 amp power supply. It picked me up and threw me 12 feet across the room, causing me to knock the sliding doors off my closet; /archives//html/Amps/2000-06/msg00435.html (9,711 bytes)
191. [AMPS] The Art of Collecting Many Large Amplifiers! (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Fri, 30 Jun 2000 09:53:03 -0700; This is a multi-part message in MIME format. --=_NextPart_000_0014_01BFE278.FB8036E0 Content-Type: text/plain; charset="iso-8859-2" Content-Transfer-Encoding: quoted-printable THE ART OF COLLECTING M; /archives//html/Amps/2000-06/msg00513.html (39,222 bytes)
192. [AMPS] FW: Amp question (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Mon, 1 May 2000 12:31:44 -0700; Hi Mark: The 3-400 and 3-500 are pretty much interchangable and were both sold with the early Drake L4 and L4B amps. The 3-400 is a great tube and actually drives easier than the 3-500. However, they; /archives//html/Amps/2000-05/msg00009.html (7,621 bytes)
193. [AMPS] 12VDC Power supply for Hercules II (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Fri, 28 Apr 2000 15:00:49 -0700; Hi Doug: The power supply is heavy for a reason. If it is lightweight, it will have lousy regulation and distortion will occur. Hi power requires heavy iron or imagination in the specification depart; /archives//html/Amps/2000-04/msg00187.html (7,766 bytes)
194. [AMPS] latest un opened SB 220 kit price off Ebay... (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sat, 29 Apr 2000 14:23:28 -0700; I had an early bid on e-Bay for an unbuilt kit - the Knight 3 tube Ocean Hopper. I recall when it sold for $11.95 new. Last time I looked, it was now at $275 and still going up. 73, Colin K7FM -- FAQ; /archives//html/Amps/2000-04/msg00194.html (7,652 bytes)
195. [AMPS] arcs and sparks (score: 1): Author: k7fm@teleport.com (Lamb); Date: Fri, 3 Mar 2000 18:11:02 -0800; Although the arc of a discharging capacitor is not caused by parasitic oscillations, nichrome wire inserted in series will reduce these non-oscillations especially if you install a glitch resistor at; /archives//html/Amps/2000-03/msg00125.html (6,939 bytes)
196. [AMPS] Globar Resistors (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sat, 4 Mar 2000 15:26:39 -0800; I parted out a commercial medical amplifier using a 4CX5000. It used a Globar resistor in the parasitic suppressor. The quality of construction of the entire amplifier was exceptional and it appeared; /archives//html/Amps/2000-03/msg00132.html (7,752 bytes)
197. [AMPS] poor science? (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sun, 5 Mar 2000 07:37:59 -0800; This is a multi-part message in MIME format. --=_NextPart_000_003D_01BF8675.BAF3D1E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yes, many amplifiers ar; /archives//html/Amps/2000-03/msg00158.html (22,977 bytes)
198. [AMPS] Misc. Oscillations (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sun, 5 Mar 2000 07:55:40 -0800; Good Point, Mark: The simple fact is that some amplifiers are built with almost the same components that were used in the 100 watt transceivers. Bandswitches, parasitic suppressors, and even tank coi; /archives//html/Amps/2000-03/msg00159.html (8,439 bytes)
199. [AMPS] Design of Plate RF Choke (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sun, 5 Mar 2000 15:16:00 -0800; Question - Assuming we can control all of the parameters of the plate rf choke (I realize that is not possible), what are the ideal characteristics? Primary goals are sufficient impedance throughout; /archives//html/Amps/2000-03/msg00191.html (8,827 bytes)
200. [AMPS] 6 volts on a 3-500Z filament (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Mon, 6 Mar 2000 13:04:06 -0800; This is a multi-part message in MIME format. --=_NextPart_000_0009_01BF876C.7454DE80 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable It has been noted that; /archives//html/Amps/2000-03/msg00292.html (12,545 bytes)

Current List: 181 - 200
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]