Mail Archive Search: <+from:rakefet@rakefet.com>

Results:

References: [ +from:rakefet@rakefet.com: 234 ]

Total 234 documents matching your query.

201. [AMPS] Amp opinion/infomation requested ASAP!! (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 30 Mar 1999 10:19:20 -0800; I forgot to add, for those who don't know, that the Matchboxes are link-coupled parallel-tuned, balanced circuits. The 4 to 1 balun in most modern tuners is very inefficient when the SWR on a balance; /archives//html/Amps/1999-03/msg00699.html (9,009 bytes)
202. [AMPS] Blower speed reduction (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 30 Mar 1999 21:52:00 -0800; I just picked up a Kooltronic model KBB35-102 centrifugal blower. Te outlet on it is 2-1/2" square. There's no CFM rating on it, but it produces enough air for 10 3-500Z's, I think. Since I have just; /archives//html/Amps/1999-03/msg00707.html (7,139 bytes)
203. [AMPS] Amplifier for CW (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sat, 13 Feb 1999 15:02:59 -0800; OK, even though I have a perfectly good working amplifier, reading about all these building projects has made me decide that I want to build one too. Here's my question: I'm a CW operator. I got a mi; /archives//html/Amps/1999-02/msg00363.html (7,810 bytes)
204. [AMPS] Amplifier for CW (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 14 Feb 1999 11:48:35 -0800; Well, I won't need a circuit to cut the tubes off between characters. True, it's not a lot of components. That's about the same as a pair of 3-500z'z. Only one tube/socket, lower plate voltage, too.; /archives//html/Amps/1999-02/msg00381.html (7,885 bytes)
205. [AMPS] Tube rating question (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 23 Feb 1999 19:42:54 -0800; Eimac's data sheet says that the 3CX800A7 has a plate dissipation of 800 watts. But then they say that it '...will deliver 750 watts PEP and 750 watts keydown CW output to 350 mHz'. I don't think the; /archives//html/Amps/1999-02/msg00643.html (7,702 bytes)
206. [AMPS] Dollars per dB (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sat, 02 Jan 1999 19:23:14 -0800; How about the QRO lid with GOOD antennas but wet noodle brains who insists on calling and calling, even though he can bloody well hear that the DX is working someone else. Now THAT's aggravating. 73,; /archives//html/Amps/1999-01/msg00035.html (8,909 bytes)
207. [AMPS] Re: SERIOUS commentary from N4XY on "no-code" (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 28 Jan 1999 08:04:52 -0800; Well, it depends on what the meaning of 'bit' is (hmm, where have I heard that before). In my opinion, the word 'yes' is one bit. Just because you are transmitting a lot of bits in your sense doesn't; /archives//html/Amps/1999-01/msg00530.html (9,060 bytes)
208. [AMPS] Re: SERIOUS commentary from N4XY on "no-code" and "bounced" submission to [CW] from Bob Marston, K1TA [LONG] but please read all (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sat, 30 Jan 1999 18:02:10 -0800; But since the SSB signal needs about (1800/50) = 36 times the bandwidth, the rate would have to be 36 times higher to break even... 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/a; /archives//html/Amps/1999-01/msg00634.html (9,554 bytes)
209. [AMPS] 3-500Z filament voltage (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 31 Jan 1999 11:47:00 -0800; <snip> What I did was bring out the filament pins directly from the tube socket to pin jacks on the back of my amp. I put 10K resistors in series with each line, and bypassed them at the pin jacks. S; /archives//html/Amps/1999-01/msg00665.html (8,364 bytes)
210. [AMPS] SB-200 problem (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 06 Dec 1998 08:03:19 -0800; Your antenna or feedline has a problem. Try with the exciter alone and fix the antenna problem first before worrying about the power output. Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.; /archives//html/Amps/1998-12/msg00090.html (8,120 bytes)
211. [AMPS] SB-200 problem (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 06 Dec 1998 09:43:20 -0800; Sorry, I read your message wrong. You said that the *input* swr was high. The problem may be in the input circuit of the SB200 or the tuning/loading conditions. Vic -- FAQ on WWW: http://www.contesti; /archives//html/Amps/1998-12/msg00096.html (8,189 bytes)
212. [AMPS] SB-200 problem (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 06 Dec 1998 09:47:55 -0800; I misread his message- I thought he was talking about the *output* swr. Sorry. I guess either the input circuit has been misadjusted or damaged. Maybe the tubes are weak, as he suggests, and the chan; /archives//html/Amps/1998-12/msg00097.html (8,524 bytes)
213. [AMPS] Telephone RFI Radio Shack Phones (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 08 Dec 1998 08:06:07 -0800; I am using a king's ransom worth of KCOM filters here (we have a home office with a bunch of phones). The answer is: they do work, on some phones. But there are some stubborn ones for which they do n; /archives//html/Amps/1998-12/msg00139.html (8,768 bytes)
214. [AMPS] Plate Choke (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 28 Dec 1998 08:02:14 -0800; I recently went through a big 'fix-the-choke' project. I found that the resonant points with the choke installed in the amplifier were significantly different than they were with the choke on the ben; /archives//html/Amps/1998-12/msg00442.html (7,594 bytes)
215. [AMPS] 3-500z question (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 13 Oct 1998 07:24:07 -0700; The 3-500z in my SB1000 seems to be getting a little tired. It seems to take more drive to get less grid current and output then before, and power seems to drop off as it gets warm. I'm going to open; /archives//html/Amps/1998-10/msg00143.html (7,706 bytes)
216. [AMPS] 3-500z question (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 13 Oct 1998 09:32:09 -0700; This is a new problem that did not appear before. So I will check for bad connections, burned switch contacts etc. However, the problem is that I can't seem to get the 150 ma grid current with normal; /archives//html/Amps/1998-10/msg00148.html (8,241 bytes)
217. [AMPS] Direct reading screen meters & High Voltage (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 27 Sep 1998 08:26:03 -0700; If you are intending to put the meter in a HV circuit, you MUST mount it on an insulating panel behind the main panel of the amp and make sure that it is impossible to contact the adjusting screw on; /archives//html/Amps/1998-09/msg00296.html (8,068 bytes)
218. [AMPS] Thanks for SB-1000 help! (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 01 Jun 1998 07:52:20 -0700; I've finally gotten all of the bugs out of my SB-1000 and made various improvements. I added vacuum-relay QSK and replaced the parasitic supressor (thanks, Rich), put in a soft-start circuit, added a; /archives//html/Amps/1998-06/msg00006.html (7,784 bytes)
219. [AMPS] Class C? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 05 Jun 1998 12:17:34 -0700; Just a theoretical question: I don't ever operate anything but CW. If I were building an amplifier, which I'm currently not, what's wrong with a grid-driven class-C tetrode? I suppose that one would; /archives//html/Amps/1998-06/msg00081.html (6,823 bytes)
220. [AMPS] Ip:Ig (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 12 Jun 1998 12:37:24 -0700; I have an SB-1000. The manual suggests that you tune up this way so that the tank is properly tuned for the peak currents that will occur with SSB. For CW, they state that plate current should be red; /archives//html/Amps/1998-06/msg00156.html (7,696 bytes)

Current List: 201 - 220
Page: [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]