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21. [AMPS] Drake L4B Improvements or suggestions (score: 1): Author: ggeurts@amp.com (Geurts, Gerard); Date: Wed, 11 Feb 1998 09:13:26 -0000; Let us assume: * 50 % TX/RX duty cycle (i.e. a 'run' station in a contest) * 35 wpm * 50 units per word ('Paris' standard) * 14 relay operations per word (based on 'Paris', using full break-in QSK) *; /archives//html/Amps/1998-02/msg00065.html (8,394 bytes)
22. [AMPS] Russian Triodes (score: 1): Author: ggeurts@amp.com (Geurts, Gerard); Date: Fri, 13 Feb 1998 08:04:44 -0000; These tubes are indeed available all over Europe. Another one is the GS35-b, a 1.5 KW plate dissipation triode that has had some coverage on the reflector as well. Very similar characteristics. It lo; /archives//html/Amps/1998-02/msg00084.html (7,442 bytes)
23. [AMPS] HF 813 amplifier thoughts. (score: 1): Author: ggeurts@amp.com (Geurts, Gerard); Date: Fri, 13 Feb 1998 08:42:58 -0000; I have done the same for a 50 MHz TB3/750 amplifier I made some years ago. I used a bifilar inductor, a shunt C to resonate the lot and power feed was somewhere 2/3 up from the cold end, indicating; /archives//html/Amps/1998-02/msg00086.html (7,422 bytes)
24. [AMPS] Automatic tuning of a VHF amp (score: 1): Author: ggeurts@amp.com (Geurts, Gerard); Date: Mon, 10 Nov 1997 11:43:34 -0000; In theory it is easy. If the triode is in grounded grid, the tube has a purely resistive load when the cathode and plate voltages are exactly 180 degrees out of phase. This takes care of output capa; /archives//html/Amps/1997-11/msg00123.html (9,074 bytes)
25. [AMPS] Automatic tuning of a VHF amp (score: 1): Author: ggeurts@amp.com (Geurts, Gerard); Date: Mon, 10 Nov 1997 13:39:15 -0000; I used to have a copy of Pappenfuss' 'SSB principles and circuits' (I think it was called). He described circuits using phase detectors and feedback loops controlling servos. This book was written i; /archives//html/Amps/1997-11/msg00127.html (7,584 bytes)
26. [AMPS] more power more TVI?? (score: 1): Author: ggeurts@amp.com (Geurts, Gerard); Date: Tue, 11 Nov 1997 14:03:23 -0000; TRX bad harmonic suppression, probably wide band solid state. Loads of TVI. Power amplifier tuned input, high Q tuned output, may be even PI-L. Less harmonics, less TVI. Gerard, PA3DQW / AA3ES -- FA; /archives//html/Amps/1997-11/msg00146.html (7,871 bytes)
27. [AMPS] Best HF Amplifier Today?? (score: 1): Author: ggeurts@amp.com (Geurts, Gerard); Date: Tue, 11 Nov 1997 17:00:10 -0000; Herb, Don't expect to get a sensible answer from the 'experts' on this reflector. They are so obsessed with their own ideas and personal vendettas that the only answer you will ever get on your quest; /archives//html/Amps/1997-11/msg00159.html (8,205 bytes)
28. [AMPS] AMPLIFIER QUESTIONS? (score: 1): Author: ggeurts@amp.com (Geurts, Gerard); Date: Mon, 17 Nov 1997 12:22:43 -0000; That is not the full explanation. The problem is that most of our 'RF power meters' (including those Bird Watt meters) are actually RF current meters, with a scale calibrated in Watts. This scale is; /archives//html/Amps/1997-11/msg00223.html (8,778 bytes)
29. [AMPS] GS-35B data sheet (score: 1): Author: ggeurts@amp.com (Geurts, Gerard); Date: Mon, 13 Oct 1997 09:52:07 +0100; Hello All, I am thinking about building an HF power amp with a Russian GS-35b triode I was given some time ago. Unfortunately, with the tubes I have I only got very limited information, and I am now; /archives//html/Amps/1997-10/msg00076.html (7,263 bytes)

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