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181. [AMPS] "the old days" (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 13 Apr 1999 17:51:41 -0700; Many of us didn't. I'm sort of an amateur historian and I love to read old QST's from the 30's and 40's. Every couple of months there was a note about some guy going to the big pileup in the sky as a; /archives//html/Amps/1999-04/msg00284.html (7,733 bytes)
182. [AMPS] Re: Full break-in... (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 16 Apr 1999 12:54:47 -0700; I've had very good results with my single 3-500z using the vacuum relay circuit described on Rich Measures' web site <http://www.vcnet.com/measures/> I used a 150v current-limited supply and Kilovac; /archives//html/Amps/1999-04/msg00312.html (7,718 bytes)
183. [AMPS] Heathkit SB-1000 coil and choke values? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 25 Apr 1999 07:45:41 -0700; I replaced the choke in mine with one purchased from Ameritron <http://www.ameritron.com>. It works fine on all bands 160-10, including WARC. Cost about $25. The AL80B choke is the one to ask for. I; /archives//html/Amps/1999-04/msg00390.html (9,206 bytes)
184. [AMPS] Power Meter Readings Question (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 28 Apr 1999 07:59:21 -0700; First of all, most power meters are very inaccurate when the SWR gets above 2 to 1. Secondly, an SWR of 2 to 1 means that the antenna impedance is either half or twice that of the line. This mismatch; /archives//html/Amps/1999-04/msg00412.html (9,139 bytes)
185. [AMPS] 3-500Z Datasheet (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 02 Mar 1999 08:57:03 -0800; Please post results to the reflector. I need this too! 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQ; /archives//html/Amps/1999-03/msg00020.html (7,004 bytes)
186. [AMPS] 8877 pulls source? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 08 Mar 1999 07:51:59 -0800; Carl, you mentioned 8877 medical pulls available from 'Equipment Recyclers'. Can you or anyone else give me an address, phone number, or web address of this company or anyone else who has 8877 pulls; /archives//html/Amps/1999-03/msg00165.html (7,012 bytes)
187. [AMPS] Chokes and Dipping chokes? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 12 Mar 1999 07:24:05 -0800; First of all, be sure you are shorting the choke when you test it. You are looking for series resonances, and shorting converts them into parallel resonances which the dip meter can detect. Second, y; /archives//html/Amps/1999-03/msg00251.html (8,824 bytes)
188. [AMPS] CW amplifier progress (well, daydream progress) -- long (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 15 Mar 1999 14:29:34 -0800; I'm contnuing to plan my CW-only amplifier. I've taken one irrevocable step and bought a DTR-2000L tank circuit with the switch, caps, coils, etc. The rest of the parts will dribble in over time, unn; /archives//html/Amps/1999-03/msg00322.html (11,309 bytes)
189. [AMPS] CW amplifier progress (well, daydream progress) -- long (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 15 Mar 1999 20:18:26 -0800; I haven't been able to find these $190 guaranteed pulls! I sent an email to Radio Recyclers, and checked out some other leads. If you can tell me who is selling these I will look into it. OK, I see t; /archives//html/Amps/1999-03/msg00334.html (10,842 bytes)
190. [AMPS] Re: [Amps] CW Amplifier progress (well, daydream progress) -- long (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 16 Mar 1999 08:01:08 -0800; I thought about this. My investigations so far haven't lead me to any cheap ones. They may be out there, but the prices I've seen so far have been quite high. Unfortunately, I can't ask for a guarant; /archives//html/Amps/1999-03/msg00347.html (8,188 bytes)
191. [AMPS] CW amplifier tubes (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 18 Mar 1999 21:43:53 -0800; I've gotten some quotes on tubes. The best price so far on tested, guaranteed medical-pull 8877's is $270 (yes, I've used the telephone). A pair of Eimac 3-500Z's, also medical pulls, is $150. Both t; /archives//html/Amps/1999-03/msg00461.html (8,915 bytes)
192. [AMPS] CW amplifier tubes (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 19 Mar 1999 09:40:50 -0800; $489.00 This is true. I just felt that if I am building a new amp, I might as well try to get maximum power. 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions:; /archives//html/Amps/1999-03/msg00487.html (7,774 bytes)
193. [AMPS] CW amplifier tubes (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 19 Mar 1999 10:03:00 -0800; I should have said "maximum *legal* power". Limits are what give meaning to life. 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Admini; /archives//html/Amps/1999-03/msg00489.html (7,724 bytes)
194. [AMPS] SB-220 info (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 19 Mar 1999 12:58:07 -0800; In my search for amplifier ideas, I want to look at the SB-220 schematic. Is there one on the net? 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@cont; /archives//html/Amps/1999-03/msg00491.html (6,633 bytes)
195. [AMPS] PS caps (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 21 Mar 1999 21:32:48 -0800; OK, I'm planning the 3000v supply for my 2 x 3-500Z amplifier. I am going to use a FW doubler, like the SB-220, with a string of 8 capacitors. Looking at the Mouser catalog, they have Mallory CGS, 21; /archives//html/Amps/1999-03/msg00539.html (7,766 bytes)
196. [AMPS] phantom plate and grid current (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 22 Mar 1999 23:00:37 -0800; Probably time for fundamental frequency neutralizing stuff. Use a GDO as an absorbtion wavemeter to find out, with reduced plate v so as not to damage the tubes. 73, Vic, K2VCO Fresno CA -- FAQ on WW; /archives//html/Amps/1999-03/msg00574.html (7,450 bytes)
197. [AMPS] Filament choke rod material (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 23 Mar 1999 14:36:57 -0800; I have a couple of Amidon R33-050-750 ferrite rods. They are 1/2" x 7-1/2" in size. They make these rods with R33 and R61 material; the R33 has a permeability of 800 and the R61 of 125. My question i; /archives//html/Amps/1999-03/msg00588.html (7,211 bytes)
198. [AMPS] PS caps (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 25 Mar 1999 17:17:27 -0800; Vic Rosenthal <rakefet@rakefet.com> writes: I bought 8 matched caps from him (not the module, just the caps) for $68. The set I got measured about 240 mf each, CDE type DCM. 73, Vic, K2VCO Fresno CA; /archives//html/Amps/1999-03/msg00618.html (7,524 bytes)
199. [AMPS] Transformer source (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 26 Mar 1999 14:39:03 -0800; I hope I'm not wearing out my welcome with all of my questions, but here's another: I'm looking for a transformer for my homebrew amp project. Plate supply needed is 3000v at 800 ma, CW duty cycle. I; /archives//html/Amps/1999-03/msg00631.html (7,001 bytes)
200. [AMPS] Amp opinion/infomation requested ASAP!! (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 30 Mar 1999 09:03:10 -0800; Right. The T-network is very popular because it easy to match a wide range of impedances with practical components, but it is a highpass filter. I have been successfully using an old Johnson 275-watt; /archives//html/Amps/1999-03/msg00697.html (8,995 bytes)

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