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Total 13 documents matching your query.

1. Fw: [AMPS] Anode load line calculations. (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Sun, 20 Dec 1998 13:07:06 +0200; In response to various comments made on my original posting. I think that some hams misunderstand the basic principles of of rf amplifiers! The load impedance of a tube is defined by the anode voltag; /archives//html/Amps/1998-12/msg00297.html (11,258 bytes)
2. Fw: [AMPS] Anode load line calculations. (score: 1): Author: measures@vc.net (Rich Measures); Date: Sun, 20 Dec 1998 03:41:55 -0800; ? This presumes that the anode's voltage swing at 100w output in the 1000w amplifier is approx. 80% of the supply potential, which is undoubtedly not the case. It seems to me that RL at any power le; /archives//html/Amps/1998-12/msg00299.html (9,541 bytes)
3. Fw: [AMPS] Anode load line calculations. (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Mon, 21 Dec 1998 13:40:12 +0200; But Rich you misunderstand what I am trying to tell you and the others!!!! The anode voltage swing WILL be the 80% or so of the dc supply voltage - but it is now developed across a much higher impeda; /archives//html/Amps/1998-12/msg00307.html (12,211 bytes)
4. Fw: [AMPS] Anode load line calculations. (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Mon, 21 Dec 1998 14:23:29 +0200; This is not peculiar to tubes. And is why the ICOM IC-781 running the PA transistors at 28 V achieves 37 dB IMD, compared to the typical 24-28 dB from 13 V transistors (IC-565, 476, Yeasu 847, 920, e; /archives//html/Amps/1998-12/msg00308.html (9,204 bytes)
5. Fw: [AMPS] Anode load line calculations. (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 21 Dec 1998 05:39:59 -0800; ? John: Are we talking about a 100w amplifier using a 2000v anode supply, delivering 100w - - or are we talking about a 1000w amplifier using a 2000v anode supply, delivering 100w because of reduced; /archives//html/Amps/1998-12/msg00310.html (8,792 bytes)
6. Fw: [AMPS] Anode load line calculations. (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Mon, 21 Dec 1998 16:10:03 +0200; Both - but what's the difference? An amplifier set up to give 100W using a 2000V supply or a 1kW amp using the same ht have the same requirement. The point I was trying to make, and which you are con; /archives//html/Amps/1998-12/msg00311.html (10,116 bytes)
7. Fw: [AMPS] Anode load line calculations. (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Mon, 21 Dec 1998 10:00:13 -0500; On Mon, 21 Dec 1998 14:23:29 +0200 Ian Roberts <itr@nanoteq.co.za> writes: A big part of that 6M linear problem if it is a TE as I suspect, is that it uses a horrible bias circuit that goes into clas; /archives//html/Amps/1998-12/msg00313.html (10,708 bytes)
8. Fw: [AMPS] Anode load line calculations. (score: 1): Author: measures@vc.net (Rich Measures); Date: Mon, 21 Dec 1998 10:52:17 -0800; ? The requirement is seemingly set by the conditions under which the amplifier is tuned up. Assuming 60% effiency, if a 1666w input, w. 2000v anode supply, 1000w-out amplifier is, , tuned up at 1666; /archives//html/Amps/1998-12/msg00316.html (11,402 bytes)
9. Fw: [AMPS] Anode load line calculations. (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Tue, 22 Dec 1998 08:01:16 +0000; It definitely does not. Very simplistically, reducing the drive reduces the grid voltage swing which reduces the anode current swing (Ia is related to gm x Vg); the reduced anode current swing throug; /archives//html/Amps/1998-12/msg00319.html (10,331 bytes)
10. Fw: [AMPS] Anode load line calculations. (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 22 Dec 1998 06:42:09 -0800; ? amen, Steve Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-R; /archives//html/Amps/1998-12/msg00323.html (8,921 bytes)
11. Fw: [AMPS] Anode load line calculations. (score: 1): Author: johnf@futurenet.co.za (John Fielding); Date: Tue, 22 Dec 1998 17:07:10 +0200; We seem to have lost the thread somewhere along the line. The original question I posed was to do with the possibility of making an output network which ALWAYS provided the correct match to the tube,; /archives//html/Amps/1998-12/msg00325.html (12,682 bytes)
12. Fw: [AMPS] Anode load line calculations. (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 22 Dec 1998 07:46:03 -0800; ? However, when the amplifier is driven at low power output, the required RL is probably not considerably higher because dV/dI remains roughly the same. ? If I need 100w out instead of 1000w, I swit; /archives//html/Amps/1998-12/msg00328.html (13,718 bytes)
13. Fw: [AMPS] Anode load line calculations. (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 22 Dec 1998 15:53:00 -0000; I gather John's idea is to always have maximum plate voltage swing, regardless of power level. One way of doing this is to vary the B+ supply with the amplitude of the signal. A system doing this, al; /archives//html/Amps/1998-12/msg00329.html (8,817 bytes)

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