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101. [AMPS] Power Supply Diodes (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 02 Feb 2000 22:00:00 -0800; That's why I suggested a transient. It doesn't look like a current-related problem. Did you have a mov in the primary or some kind of transient-absorbing circuitry across the secondary? Whether or no; /archives//html/Amps/2000-02/msg00021.html (8,900 bytes)
102. [AMPS] Wire size (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 02 Feb 2000 22:02:34 -0800; Yes, and the consensus of opinion is that the voltage drop with smaller wire would be a bigger problem than heating. For example, according to the table in the ARRL handbook, 10 feet of #6 would drop; /archives//html/Amps/2000-02/msg00022.html (7,884 bytes)
103. [AMPS] Ameritron ALS600 (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 13 Feb 2000 19:52:46 -0800; I would think you could see this on a scope. That would establish if what they are telling you is correct. Perhaps you could make an attenuator so that the 450 would need to be at full output to driv; /archives//html/Amps/2000-02/msg00228.html (7,599 bytes)
104. [AMPS] Loss in doorknob caps? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 20 Feb 2000 21:53:34 -0800; Someone else can tell you about losses, but I would expect that the stray inductance in the doorknobs would be much greater than with air variables. This, combined with the tolerance of the capacitor; /archives//html/Amps/2000-02/msg00406.html (7,561 bytes)
105. [AMPS] Rich is back, now how about KM1H ??? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 21 Feb 2000 11:10:04 -0800; Good idea. I would also like to see Tom, W8JI, too. Perhaps these guys would agree not to try to kill each other! I remember reading an article in which someone said that a software company could onl; /archives//html/Amps/2000-02/msg00438.html (8,588 bytes)
106. [AMPS] Spreadsheet pgm (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 21 Feb 2000 19:07:35 -0800; I think you mean <http://www.ifwtech.demon.co.uk/g3sek/pi-l-net.zip> Clicking on this link downloads the Pi/Pi-L net design spreadsheet. If you can't download it, I can email a copy. 73, Vic, K2VCO; /archives//html/Amps/2000-02/msg00460.html (7,161 bytes)
107. SV: [AMPS] AL-80 / SB-1000 circuit improvements (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 29 Feb 2000 07:28:07 -0800; We've had this discussion numerous times in the past. I have an SB1000. The manual describes a tuning procedure that allows 500 ma current for a short period only, so that the tank circuit will be op; /archives//html/Amps/2000-02/msg00654.html (8,140 bytes)
108. [AMPS] Wanted: tetrode amp (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 05 Jan 2000 10:37:35 -0800; I'm looking for an amplifier, either commercial or a reasonable homebrew job, with about 500 to 1500 watts output that will provide this with 10-15 watts drive. Plate supply need not be included. I h; /archives//html/Amps/2000-01/msg00126.html (6,789 bytes)
109. [AMPS] abnormallly high plate current (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 06 Jan 2000 07:10:55 -0800; Lane, What's the grid current, and how much driving power is it getting? If you are driving it harder and getting less output, the tube may be dying. I had a similar situation, and it was due to a ti; /archives//html/Amps/2000-01/msg00150.html (8,370 bytes)
110. [AMPS] abnormallly high plate current (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 06 Jan 2000 07:11:59 -0800; Oops. Then I'm stumped. 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems:; /archives//html/Amps/2000-01/msg00151.html (8,871 bytes)
111. [AMPS] Henry solid-state experiences? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sat, 15 Jan 2000 20:48:53 -0800; Has anyone used any of the Henry solid-state amplifiers (SS500HF, SS750HF, SS1200HF)? Opinions? 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contes; /archives//html/Amps/2000-01/msg00348.html (6,916 bytes)
112. [AMPS] Henry solid-state experiences? (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 16 Jan 2000 11:54:12 -0800; In what way will it not forgive you if, for example, you transmit into the wrong antenna? I'm considering it for fixed station use, so I don't expect large swr variations in my antenna, but I've been; /archives//html/Amps/2000-01/msg00362.html (7,839 bytes)
113. [AMPS] SB-220 conundrum (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 18 Jan 2000 08:39:47 -0800; An off-the-wall guess: I recall that with grid-driven amps, a big difference between the point of minimum current and maximum output was often indicative of improper neutralization -- in other words,; /archives//html/Amps/2000-01/msg00394.html (8,642 bytes)
114. SV: [AMPS] UrgentSwedish questions (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 24 Jan 2000 07:39:56 -0800; If I'm not mistaken, contact no. 9 goes to the padder capacitor. The other side of the padder goes to the plate. This is the high potential point. Contact no. 7 is grounded. The arc can be from conta; /archives//html/Amps/2000-01/msg00498.html (8,222 bytes)
115. [AMPS] Little amp -- wanted (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sat, 11 Dec 1999 19:27:49 -0800; I have recently built a neat little 10 watt transceiver (Elecraft K2), and want something to boost its output to about 500w. I am just finishing my 'big' -- by my standards, anyhow -- 1500 watt ampli; /archives//html/Amps/1999-12/msg00114.html (7,992 bytes)
116. [AMPS] Little amp -- wanted (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 12 Dec 1999 10:41:53 -0800; I think you're right. However, a grid-driven tetrode amp could probably be modified to do this; as sold, any such amp must be arranged to dissipate some of the drive power to allow it to work with 50; /archives//html/Amps/1999-12/msg00122.html (7,838 bytes)
117. [AMPS] Need K9AU address (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 13 Dec 1999 10:17:09 -0800; Does anyone have the new (in MN) address for Frank, K9AU, the guy that sells used tubes? QRZ is out of date, and I misplaced the address. A phone number would be nice, too. 73, Vic, K2VCO Fresno CA -; /archives//html/Amps/1999-12/msg00130.html (6,594 bytes)
118. [AMPS] QRO HF 2500DX (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 27 Dec 1999 19:57:46 -0800; A buddy of mine who does not have internet access has expressed an interest in the QRO Technologies HF 2500DX amplifier. Does anyone have any experiences, comments, etc.? 73, Vic, K2VCO Fresno CA --; /archives//html/Amps/1999-12/msg00396.html (6,560 bytes)
119. [AMPS] WTB: NCL2000 (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 28 Dec 1999 18:56:31 -0800; I'm looking for an NCL-2000. Must be in good working condition, with good tubes (I know, I know). 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@cont; /archives//html/Amps/1999-12/msg00398.html (6,608 bytes)
120. [AMPS] Bandswitch question (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 10 Nov 1999 14:23:57 -0800; I have a nice bandswitch, 2 poles x 8 positions. I believe it came from a Dentron amp; it's a little bigger than the SB220 type of switch and it has round fixed contacts and a very nice wiping-type s; /archives//html/Amps/1999-11/msg00268.html (7,122 bytes)

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