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Total 6 documents matching your query.

1. [Amps] Need for input tuning circuit (score: 1): Author: Bill Turner <dezrat1242@ispwest.com>; Date: Fri, 08 Oct 2004 15:41:13 -0700; Consider a grounded-grid 8877 HF amplifier. I understand the need for an input tuning circuit to maintain linearity operating SSB, but what if the operation is CW or RTTY? What if the 8877 is driven; /archives//html/Amps/2004-10/msg00100.html (6,684 bytes)
2. Re: [Amps] Need for input tuning circuit (score: 1): Author: "Phil Clements" <philk5pc@tyler.net>; Date: Fri, 8 Oct 2004 18:27:34 -0500; Consider a grounded-grid 8877 HF amplifier. I understand the need for an input tuning circuit to maintain linearity operating SSB, but what if the operation is CW or RTTY? What if the 8877 is driven; /archives//html/Amps/2004-10/msg00101.html (8,538 bytes)
3. Re: [Amps] Need for input tuning circuit (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Sat, 09 Oct 2004 11:10:24 -0700; Bill L. Fuqua wrote: But, if you are only operating CW or FSK it is not needed. Due to the fact that intermodulation distortion is not an issue. You can operate class C. The only need for some ( very; /archives//html/Amps/2004-10/msg00117.html (7,930 bytes)
4. Re: [Amps] Need for input tuning circuit (score: 1): Author: "DF3KV" <df3kv@aol.com>; Date: Sat, 9 Oct 2004 22:37:45 +0200; standard current flow voltage) and key is up. running the Hi Vic, How was full class-C maintained on the opposite cycle, when no grid current flows? For full class-C the 813 has to be biased with -15; /archives//html/Amps/2004-10/msg00118.html (8,166 bytes)
5. Re: [Amps] Need for input tuning circuit (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Sat, 09 Oct 2004 17:40:24 -0700; DF3KV wrote: How was full class-C maintained on the opposite cycle, when no grid current flows? For full class-C the 813 has to be biased with -155V at 2250V EHT There needs to be a capacitor across; /archives//html/Amps/2004-10/msg00121.html (8,094 bytes)
6. Re: [Amps] Need for input tuning circuit (score: 1): Author: craxd <craxd1@ezwv.com>; Date: Sun, 10 Oct 2004 09:57:34 -0400; Vic, Peter, and others, I think what Vic is talking about is using a "grid leak" bias circuit. The tube actually has bias this way by charging the capacitor up which is parallel with a resistor. This; /archives//html/Amps/2004-10/msg00129.html (9,904 bytes)

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