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181. [AMPS] L-supp (score: 1): Author: measures@vcnet.com (measures); Date: Sun, 30 Jan 2000 07:17:49 -0700; Does anyone have any idea how much L-supp Harbaugh uses in his prefabricated3-500Z vhf parasitic suppressors? thanks - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contest; /archives//html/Amps/2000-01/msg00576.html (6,499 bytes)
182. [AMPS] Need manual for Henry 1KD5 (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 31 Jan 2000 07:41:33 -0700; would a schematic do you any good, Kevin? As I recall, there is not much info in the manual. They don't even caution against using more than 65w drive. In a Henry 1KD that I repaired, there was c. 5; /archives//html/Amps/2000-01/msg00584.html (7,203 bytes)
183. [AMPS] Re: (score: 1): Author: measures@vcnet.com (measures); Date: Wed, 1 Dec 1999 05:57:29 -0700; -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.con; /archives//html/Amps/1999-12/msg00002.html (6,661 bytes)
184. [AMPS] SB-220 G-G mods (score: 1): Author: measures@vcnet.com (measures); Date: Wed, 1 Dec 1999 05:57:26 -0700; Yes, however, the grid-resonance moved only a small amount. I reversed the mod so that I could use grid fusing resistors. The amplifier was apparently stable either way. At the time, I was using low; /archives//html/Amps/1999-12/msg00003.html (7,494 bytes)
185. [AMPS] SB-220 Ip (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 6 Dec 1999 11:58:52 -0700; Did you put the high speed relays and the electronic cathode bias switch on the same piece of perfboard? - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/amp; /archives//html/Amps/1999-12/msg00046.html (7,577 bytes)
186. SV: [AMPS] Tetrode Amp Help (score: 1): Author: measures@vcnet.com (measures); Date: Thu, 9 Dec 1999 07:34:46 -0700; ? On page four of Eimac's specification it says that the screen voltage must be maintained constant. ? Not slow. Anode current increases exponentially with increasing screen potential. ? Why? One is; /archives//html/Amps/1999-12/msg00070.html (9,387 bytes)
187. [AMPS] Tetrode Amp Help (score: 1): Author: measures@vcnet.com (measures); Date: Thu, 9 Dec 1999 07:34:45 -0700; ? Eimac 8660 specification sheet dated 6-1-1967, page 4, "The screen voltage must be maintained constant... ...". ' ? Typical screen current is stated to be Negative 14mA. cheers, Ian. - Rich..., 80; /archives//html/Amps/1999-12/msg00071.html (10,111 bytes)
188. [AMPS] Tetrode Amp Help (score: 1): Author: measures@vcnet.com (measures); Date: Thu, 9 Dec 1999 07:34:43 -0700; See Figure 10 on my Web site. ? The 8660/4CX1500B has a 12w-rated screen but it requires very little in the way of screen current. In fact, it generates about 14mA of screen current in Class AB1 ope; /archives//html/Amps/1999-12/msg00072.html (11,957 bytes)
189. [AMPS] AL-1500 RF Relay (score: 1): Author: measures@vcnet.com (measures); Date: Thu, 9 Dec 1999 07:34:42 -0700; ? There is no 3PDT vacuum relay that will switch fast enough to keep up with modern radios. Figure 7 on my Web site shows a circuit that will. The total cost of the high speed sw. mod is c. $60. lat; /archives//html/Amps/1999-12/msg00073.html (6,914 bytes)
190. SV: SV: [AMPS] Tetrode Amp Help (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 10 Dec 1999 02:47:35 -0700; I do not agree. When the screen / G2 voltage is not held constant, distortion results. cheers. .......... - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/am; /archives//html/Amps/1999-12/msg00084.html (9,136 bytes)
191. [AMPS] Tetrode Amp Help (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 10 Dec 1999 03:20:43 -0700; ? yes. ? Does screen current exist without drive? This is hardly a logical method to cut the tube off, Ian. Tis easier to switch grid bias. Ordinary relays are more suitable for switching 90vdc than; /archives//html/Amps/1999-12/msg00085.html (10,977 bytes)
192. [AMPS] Tetrode Amp Help (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 10 Dec 1999 03:20:45 -0700; ? The grid of the 4CX350A has a rating of 2mA Max. G-G service with this tube is Bananas. ........ - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.h; /archives//html/Amps/1999-12/msg00086.html (9,494 bytes)
193. SV: SV: [AMPS] Tetrode Amp Help (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 10 Dec 1999 10:36:16 -0700; cap gain indeed, George. G2 DAF amplifer salesmen seem to be somewhat DAFt. They are sort of like inventors of 400mpg carbs for autos. cheers - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ; /archives//html/Amps/1999-12/msg00091.html (9,709 bytes)
194. [AMPS] New AMP Pix (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 10 Dec 1999 10:36:18 -0700; ? Editorial: Building a 2, 8877 amplifier puzzles me. 2, 8877s incurs more tube cost than a single 8171 . 8877s require a higher-pressure, noisier blower. A pair can do up to 5 out. The 8171 can do; /archives//html/Amps/1999-12/msg00092.html (8,436 bytes)
195. SV: SV: SV: [AMPS] Tetrode Amp Help (score: 1): Author: measures@vcnet.com (measures); Date: Fri, 10 Dec 1999 15:43:39 -0700; ? Please name another grid-driven "linear amplifier" design that uses widely varying screen potentials. ? yes. Seasons greetings, Lars. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW; /archives//html/Amps/1999-12/msg00099.html (9,602 bytes)
196. [AMPS] Little amp -- wanted (score: 1): Author: measures@vcnet.com (measures); Date: Sun, 12 Dec 1999 12:49:35 -0700; ? A tetrode that is designed for 50 watts or more of drive has better stability than one designed to work with a few watts of drive. cheers, Vic - Rich..., 805.386.3734, www.vcnet.com/measures. -- F; /archives//html/Amps/1999-12/msg00124.html (8,068 bytes)
197. SV: SV: SV: [AMPS] Tetrode Amp Help (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 13 Dec 1999 12:19:23 -0700; The TS-830S has the lowest IMD of any transceiver, yet it does not have a regulated screen supply. Why? The screen supply is fairly stiff and the Final Unit incorporates RF-NFB ? So did spark transm; /archives//html/Amps/1999-12/msg00131.html (11,938 bytes)
198. SV:SV:SV: [AMPS] Tetrode Amp Help (score: 1): Author: measures@vcnet.com (measures); Date: Mon, 13 Dec 1999 21:22:19 -0700; In which piece of equipment, Bob? - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amp; /archives//html/Amps/1999-12/msg00146.html (9,140 bytes)
199. [AMPS] SB-230 re-tube? (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 14 Dec 1999 06:03:00 -0700; ? However, for multi-tube installation, the socket spacing with 3cx800A7s must be a bit wider than with 8874s in order to accomodate the 3cx800A7's wider anode cooler. - Rich..., 805.386.3734, www.v; /archives//html/Amps/1999-12/msg00152.html (9,829 bytes)
200. [AMPS] Power Supply Cap Suitability (score: 1): Author: measures@vcnet.com (measures); Date: Tue, 14 Dec 1999 09:23:21 -0700; Such capacitors are typically derated to 60% of peak v. for continuous filter service. Cheers, Grant. - Rich..., 805.386.3734, www.vcnet.com/measures. -- FAQ on WWW: http://www.contesting.com/ampsfa; /archives//html/Amps/1999-12/msg00156.html (7,473 bytes)

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