- 1. [AMPS] Automatic tuning of a VHF amp (score: 1)
- Author: davek@medphys.ucl.ac.uk (Dave Kirkby)
- Date: Mon, 10 Nov 1997 11:07:13 +0000
- Hi all, my latest VHF triode amp is going to use stepper motors to control the anode tuning and possibly loading, for two main reasons: 1) That way I can get the controls in the best position on the
- /archives//html/Amps/1997-11/msg00122.html (8,451 bytes)
- 2. [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)
- 3. [AMPS] Automatic tuning of a VHF amp (score: 1)
- Author: davek@medphys.ucl.ac.uk (Dave Kirkby)
- Date: Mon, 10 Nov 1997 12:26:26 +0000
- Thanks for your comments on automatic tuning. I assume a computer could be programed to do it from just the RF output, grid current and anode current - after all, thats all we use. However, I did not
- /archives//html/Amps/1997-11/msg00126.html (9,122 bytes)
- 4. [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)
- 5. [AMPS] Automatic tuning of a VHF amp (score: 1)
- Author: km1h@juno.com (km1h @ juno.com)
- Date: Mon, 10 Nov 1997 12:33:33 EST
- Dave, how important is it to have to retune once the amp is set up and running? In my 2M 3CX1000A7 I have had no need to retune in over 7 years....since I built it. I also did away with the mechanica
- /archives//html/Amps/1997-11/msg00128.html (11,194 bytes)
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