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Total 7 documents matching your query.

1. [Amps] AL-1500 Circuit Diagram (score: 1): Author: R.Measures <r@somis.org>; Date: Tue, 1 Mar 2005 08:48:36 -0800; In the AL-1500 diagram, the cathode is connected to one side of the heater, C7 couples RF from the tuned-input to the cathode ,and C8 couples RF from the tuned-input to the other side of the heater.; /archives//html/Amps/2005-03/msg00002.html (6,360 bytes)
2. Re: [Amps] AL-1500 Circuit Diagram (score: 1): Author: Vic Rosenthal <vic@rakefet.com>; Date: Tue, 01 Mar 2005 09:08:21 -0800; I'm going to guess. The heater is connected to the cathode and isolated from ground by an RF choke because if it were grounded, then the heater-cathode capacity would reduce the drive available on th; /archives//html/Amps/2005-03/msg00004.html (8,018 bytes)
3. Re: [Amps] AL-1500 Circuit Diagram (score: 1): Author: "Jerry Muller" <jerry@k0tv.com>; Date: Tue, 1 Mar 2005 12:17:34 -0500; If the heater isn't driven, the heater will sputter itself to the cathode and eventually it will end up with a short between the heater and the cathode. You need to put a filament choke in an amplifi; /archives//html/Amps/2005-03/msg00006.html (8,266 bytes)
4. Re: [Amps] AL-1500 Circuit Diagram (score: 1): Author: TexasRF@aol.com; Date: Tue, 1 Mar 2005 12:18:59 EST; In the AL-1500 diagram, the cathode is connected to one side of the heater, C7 couples RF from the tuned-input to the cathode ,and C8 couples RF from the tuned-input to the other side of the heater.; /archives//html/Amps/2005-03/msg00007.html (8,087 bytes)
5. Re: [Amps] AL-1500 Circuit Diagram (score: 1): Author: "Dr. William J. Schmidt, II" <bill@wjschmidt.com>; Date: Tue, 1 Mar 2005 19:43:08 -0600; ** I'm posting this for K0DD.... Reply to him at rbonner@qro.com ** He's right, there is no reason to do that. My 77DD amplifiers drove only the cathodes and it only takes a single 1 amp RFC per tube; /archives//html/Amps/2005-03/msg00013.html (11,470 bytes)
6. Re: [Amps] AL-1500 Circuit Diagram (score: 1): Author: "Phil Clements" <philk5pc@tyler.net>; Date: Tue, 1 Mar 2005 20:47:13 -0600; 160 meters on the Alpha 77DX/SX has always appeared to me to be an after-thought. They can be made to work with several mods. One of them is, as Dr. Schmidt suggests, is a filament choke in the heat; /archives//html/Amps/2005-03/msg00014.html (9,341 bytes)
7. Re: [Amps] AL-1500 Circuit Diagram (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 2 Mar 2005 05:52:14 -0800; A driver-powered heater? Now there's a new one. If C8 were removed, C7 would couple all of the drive to the cathode. Richard L. Measures, AG6K, 805.386.3734. www.somis.org ___________________________; /archives//html/Amps/2005-03/msg00017.html (8,875 bytes)

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