- 1. [AMPS] Re: 4-1000A Impedance Variations (score: 1)
- Author: measures@vc.net (Rich Measures)
- Date: Mon, 23 Mar 98 15:47:20 -0800
- You are talking about measuring swr with a tuned circuit/flywheel at the cathode. Cathode impedance, this is not. You must measure direct into the cathode? . . One problem with a noise bridge is tha
- /archives//html/Amps/1998-03/msg00372.html (8,151 bytes)
- 2. [AMPS] Re: 4-1000A Impedance Variations (score: 1)
- Author: jono@webspun.com (Jon Ogden)
- Date: Mon, 23 Mar 98 22:30:48 -0600
- It doesn't make any difference. The tuned input circuitry is supposed to match between 2 different impedances. 50 Ohms on the exciter side and whatever the tube impedance is on the other. For a 4-10
- /archives//html/Amps/1998-03/msg00374.html (8,680 bytes)
- 3. [AMPS] Re: 4-1000A Impedance Variations (score: 1)
- Author: jono@webspun.com (Jon Ogden)
- Date: Mon, 23 Mar 98 23:00:51 -0600
- Rich, One thing I want to point out is that I got the idea of using the RX noise bridge from the paper that Jim Thomson sent to me. Again that was an article by Irvin M. Hoff, W6FFC that was publish
- /archives//html/Amps/1998-03/msg00376.html (8,445 bytes)
- 4. [AMPS] Re: 4-1000A Impedance Variations (score: 1)
- Author: measures@vc.net (Rich Measures)
- Date: Tue, 24 Mar 98 06:57:33 -0800
- I think it does make a difference if you connect a pi network to the device you are trying to measure the Z of. Not quite. If this was the whole story, a Q of one would work perfectly, and it does n
- /archives//html/Amps/1998-03/msg00386.html (10,104 bytes)
- 5. [AMPS] Re: 4-1000A Impedance Variations (score: 1)
- Author: measures@vc.net (Rich Measures)
- Date: Tue, 24 Mar 98 06:57:43 -0800
- Easiest and quickest is not to waste your time measuring. I don't think I would be inclined to connect a Rx noise bridge to the cathode of 4-1000A with six or seven kV on the anode. To save time, bu
- /archives//html/Amps/1998-03/msg00388.html (9,117 bytes)
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