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21. Re: [Amps] 4-250A (score: 1): Author: "W.F van Wyk" <zs6arf@telkomsa.net>; Date: Sun, 2 Jul 2006 08:30:59 +0200; Hi Bob, Thank you for your sane reply affirming exactly what I have been doing in my use of the 4-250A. I always take what is presented on this site and do my best to eliminate the technical extreme; /archives//html/Amps/2006-07/msg00035.html (8,323 bytes)
22. Re: [Amps] Maximum RF output in practical application: 4-250A (score: 1): Author: "W.F van Wyk" <zs6arf@telkomsa.net>; Date: Sun, 2 Jul 2006 12:40:28 +0200; Thanks Peter. That is what I usually aim at when I construct ... about a kW out but I have gone to considerable trouble and expense acquiring spectrum analyzer/communication analyzer and other test e; /archives//html/Amps/2006-07/msg00041.html (9,675 bytes)
23. [Amps] SK840 socket with 4cx1000A tube (score: 1): Author: "W.F van Wyk" <zs6arf@telkomsa.net>; Date: Sat, 3 Feb 2007 19:35:13 +0200; Greetings I have an SK840 socket with the 5cx1500A tube. The new 4cx1000A tube I also have fits perfectly in the SK840 socket. Can I use the SK840 as the base for my 4cx1000A in a new amp I am planni; /archives//html/Amps/2007-02/msg00026.html (6,541 bytes)
24. [Amps] 2M 8877 Amplifier: No grid or plate current (score: 1): Author: "W.F van Wyk" <zs6arf@telkomsa.net>; Date: Thu, 12 Apr 2007 20:01:46 +0200; Greetings, I am attempting to commission an 2 meter 8877 home built amplifier. As I did not do the construction I have to reverse engineer. The mechanical and electronic construction do look sound an; /archives//html/Amps/2007-04/msg00096.html (7,580 bytes)
25. Re: [Amps] love the microwave oven amp! (score: 1): Author: "W van Wyk" <zs6arf@telkomsa.net>; Date: Sun, 15 Mar 2009 06:06:08 +0200; I think the original builder were not a "dummy" at all. I see some good "homebrew" ingenuity and some care taken which is many times not evident in the commercial offerings. It is always easy to find; /archives//html/Amps/2009-03/msg00416.html (9,775 bytes)
26. [Amps] AMERITRON AL-80B TUBE ARC / SPLATTER (score: 1): Author: "Wynand" <zs6arf@telkomsa.net>; Date: Mon, 22 Jun 2009 22:33:42 +0200; Greetings from ZS land. I have an Ameritron AL-80B (single 3-500Z) on the bench that is uncooperative. HV is fine but once it goes beyond 100mA Grid Current with about 20 watts of drive the tube star; /archives//html/Amps/2009-06/msg00093.html (7,365 bytes)
27. Re: [Amps] AMERITRON AL-80B TUBE ARC / SPLATTER (score: 1): Author: "Wynand" <zs6arf@telkomsa.net>; Date: Mon, 22 Jun 2009 23:33:11 +0200; Hello Tony, Yes the arc is inside the tube.... as grid current increases with an increase in RF the tube start to glow red and then suddenly blue arcs start to flash quite symmetrically right at the; /archives//html/Amps/2009-06/msg00095.html (8,072 bytes)

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