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81. [AMPS] SB1000 (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 30 Jul 2000 07:25:19 -0700; Yes, it does. No conversion needed. 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Pr; /archives//html/Amps/2000-07/msg00204.html (6,650 bytes)
82. [AMPS] Two Questions (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 12 Jun 2000 10:43:51 -0700; If the amplifier is single-ended, you can theoretically use a pi-output circuit with a balanced grid circuit to provide a place to hang the neutralizing capacitor. However, I suspect that there may b; /archives//html/Amps/2000-06/msg00115.html (7,936 bytes)
83. [AMPS] SB-1000 (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sat, 17 Jun 2000 19:00:30 -0700; The stock plate RF choke may have a resonance near 17 meters. I replaced the one in mine with an Ameritron AL80B choke, which works well on all bands, including WARC. Cost about $25 from Ameritron. T; /archives//html/Amps/2000-06/msg00231.html (7,788 bytes)
84. [AMPS] WTB or trade: counter dial (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 21 Jun 2000 09:29:41 -0700; I need a turns counter dial for a vacuum cap. I have one which is metal, about 3" x 3", and has a crank handle at the bottom with an 'odometer' above it. I would like another one like this if possibl; /archives//html/Amps/2000-06/msg00297.html (6,916 bytes)
85. [AMPS] Amadon (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 29 Jun 2000 10:19:52 -0700; Bytemark at <http://www.bytemark.com> is a dealer that sells small quantities of Amidon products. 73, Vic, K2VCO Fresno CA -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesti; /archives//html/Amps/2000-06/msg00494.html (6,865 bytes)
86. [AMPS] Henry SS750 results (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 05 May 2000 08:10:50 -0700; Recently I carried out some tests on my new Henry Radio SS750HF amplifier. This amplifier contains 8 2SC2879 transistors; it has 4 modules each with two transistors and splitter-combiner circuitry. T; /archives//html/Amps/2000-05/msg00058.html (9,062 bytes)
87. [AMPS] Henry SS750 results (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 05 May 2000 09:42:17 -0700; I presumed this referred to duty-cycle considerations. In other words, 500 watts RTTY. Anyway, if the amp can't deliver 750 watts CW for a short period, then it is saturating at not able to deliver 7; /archives//html/Amps/2000-05/msg00061.html (8,507 bytes)
88. [AMPS] Henry SS750 results (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Fri, 05 May 2000 09:44:09 -0700; I can't seem to write. Here's what I meant to say: I presumed this referred to duty-cycle considerations. In other words, 500 watts RTTY. Anyway, if the amp can't deliver 750 watts CW for a short per; /archives//html/Amps/2000-05/msg00062.html (7,403 bytes)
89. [AMPS] SS750 output -- more tests (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Sun, 07 May 2000 19:35:40 -0700; I'm still trying to figure out why I can only get about 600 watts output on 14 MHz from my Henry SS750 amplifier (8 x 2SC2879). I measured the output into the dummy load with various levels of drive,; /archives//html/Amps/2000-05/msg00093.html (8,563 bytes)
90. [AMPS] SS750 output -- more tests (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 08 May 2000 07:21:41 -0700; Mine has the 2 db attenuator (AT1) in all of the time and the 3 db one (AT2) is switched in on 160, 80, and 40 meters. Not on this test, though I did on the previous test on all bands with 100 watts.; /archives//html/Amps/2000-05/msg00104.html (8,789 bytes)
91. [AMPS] SS750 output -- more tests (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 08 May 2000 11:02:43 -0700; The spec sheet says 15 db typical, 13 db minimum at 28 MHz. I would expect the gain to be greater at 14 MHz. And I have a 2 x 2SC2879 amplifier, as well as my TS850S which uses 2SC2879s; both of thes; /archives//html/Amps/2000-05/msg00108.html (9,565 bytes)
92. [AMPS] SS750 output -- more tests (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 08 May 2000 11:47:18 -0700; I just had another look at the schematic -- now I'm really mystified. In the schematic, there are three relays connected to the 40, 20, and 10 meter control lines. Each of these relays' normally CLOS; /archives//html/Amps/2000-05/msg00109.html (8,734 bytes)
93. [AMPS] SS750 20 meter test and (maybe) explanation (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Mon, 08 May 2000 19:38:50 -0700; Here are the results of testing the SS750 (8 x 2SC2879) on 14 MHz. including collector currents. Someone also asked what the bias voltage is; it is +0.66 volts on all the modules. Testing was into a; /archives//html/Amps/2000-05/msg00113.html (9,319 bytes)
94. [AMPS] SS750 20 meter test and (maybe) explanation (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 09 May 2000 07:57:00 -0700; I don't know if this means anything, but a check of the impedance looking into the coax feeding my antenna (which seems to work much better with the amp than the dummy load) with an ancient Millen an; /archives//html/Amps/2000-05/msg00120.html (9,480 bytes)
95. [AMPS] SS750 20 meter test and (maybe) explanation (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 09 May 2000 08:14:17 -0700; I am not sorry I bought this amplifier; it has a very good cooling system and will probably prove to be quite reliable. I chose it over the TenTec (etc.) because it appeared to be conservative in des; /archives//html/Amps/2000-05/msg00121.html (8,546 bytes)
96. [AMPS] QSK5 Unit (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 18 May 2000 08:23:37 -0700; I think the speed you need depends on whether you can get a good early 'transmit' signal from your exciter. I've used the vacuum relay / reed relay circuit on Rich's web site successfully in several; /archives//html/Amps/2000-05/msg00216.html (8,323 bytes)
97. [AMPS] FS: SB-1000 heathkit amp (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Thu, 06 Apr 2000 15:33:43 -0700; For sale, Heathkit SB-1000 160-10m linear. Has single 3-500Z providing about 750 watts CW and 1 kw PEP SSB output. Wired for 240v, can be changed to 120v. Modifications include soft start, vacuum rel; /archives//html/Amps/2000-04/msg00043.html (7,085 bytes)
98. [AMPS] FS: Power supply (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Tue, 01 Feb 2000 18:58:16 -0800; I have changed plans and I have a just-built 3200v power supply for sale. It contains a 60-lb Dahl hypersil transformer rated 2400v at 1a CCS with a 220/240 50/60 hz primary. Especially on 60 hz I ex; /archives//html/Amps/2000-02/msg00005.html (6,942 bytes)
99. [AMPS] Power Supply Diodes (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 02 Feb 2000 19:43:10 -0800; My theory is that a transient on the AC line is the cause. It was spread unevenly across the diode string because of junction-capacitance differences. Paralleling each diode with a low-tolerance .001; /archives//html/Amps/2000-02/msg00012.html (8,456 bytes)
100. [AMPS] Wire size (score: 1): Author: rakefet@rakefet.com (Vic Rosenthal); Date: Wed, 02 Feb 2000 19:49:57 -0800; I'm going to power a solid state amp with about 120 amps of 13vdc. I'll need about 6-8 feet of wire to get from the PS to the amp. What wire size should I use? 73, Vic, K2VCO Fresno CA -- FAQ on WWW:; /archives//html/Amps/2000-02/msg00013.html (7,555 bytes)

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