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1. [Amps] K8CPA (score: 1): Author: k4ik@subich.com (Joe Subich, K4IK); Date: Tue, 24 Dec 2002 15:55:44 -0500; This thread ends right here ... There is no reason for responding to an obvious effort to stir up trouble and further public postings will be dealt with accordingly.; /archives//html/Amps/2002-12/msg00277.html (7,404 bytes)
2. [Amps] CQ Brussels & London (score: 1): Author: k4ik@subich.com (Joe Subich, K4IK); Date: Sun, 29 Dec 2002 22:22:22 -0500; I will be in Brussels 6-7 January and London 8-10 January. My schedule is relatively clear both evenings in Brussels and Wednesday evening in London. Anything interesting during that time? 73, ... Jo; /archives//html/Amps/2002-12/msg00318.html (6,322 bytes)
3. [Amps] SB-200 Problem (score: 1): Author: k4ik@subich.com (Joe Subich, K4IK); Date: Tue, 5 Mar 2002 10:19:18 -0500; What brand of tubes do you have? Some brands (Svetlana) required much higher cut-off bias and were unreliable in certain amplifiers unless the bias circuit was modified to provide a higher voltage.; /archives//html/Amps/2002-03/msg00087.html (8,439 bytes)
4. [Amps] AL-84 Modification Suggestions... (score: 1): Author: k4ik@subich.com (Joe Subich, K4IK); Date: Tue, 5 Mar 2002 14:19:04 -0500; Gerry, You might consider a 4CX400 (or the Russian surplus equivalent) instead of the 4CX250. The '400 should be good for 400 watts output if you can generate enough grid voltage (might require a 200; /archives//html/Amps/2002-03/msg00099.html (7,606 bytes)
5. [Amps] 3CX800A7 Cooling requirements (score: 1): Author: k4ik@subich.com (Joe Subich, K4IK); Date: Sun, 10 Mar 2002 11:50:39 -0500; The old Eimac data sheets call for 19 CFM at .35" back pressure at sea level and 23 CFM at .39" for 5000 feet. 73, ... Joe, K4IK; /archives//html/Amps/2002-03/msg00213.html (7,444 bytes)
6. [Amps] 10 Meters (score: 1): Author: k4ik@subich.com (Joe Subich, K4IK); Date: Thu, 14 Mar 2002 11:45:24 -0500; Why on earth would they use 42 Volts instead of the 48 Volt systems already in use in many other platforms? 42 volt systems will require a new set of development as opposed to the COTS (commercial o; /archives//html/Amps/2002-03/msg00314.html (8,844 bytes)
7. [Amps] Terminology Question (score: 1): Author: k4ik@subich.com (Joe Subich, K4IK); Date: Wed, 20 Mar 2002 21:18:09 -0500; The terminology came from the multiple batteries used in early equipment (particularly receivers). The B battery was the high voltage (plates), the A battery was the filament supplies (if I remember; /archives//html/Amps/2002-03/msg00450.html (9,127 bytes)
8. [Amps] Dentron GLA 1000 and Amp Supply Amplifier follow up comments. (score: 1): Author: k4ik@subich.com (Joe Subich, K4IK); Date: Fri, 29 Mar 2002 08:47:04 -0500; If someone produced a new PC board for it, a conversion to single 4CX400 would be interesting for the GLA-1000. The only real issue would be getting the proper high voltage. The 4CX400 is easier to; /archives//html/Amps/2002-03/msg00679.html (8,357 bytes)
9. [Amps] Help unsubscribing (score: 1): Author: k4ik@subich.com (Joe Subich, K4IK); Date: Fri, 29 Mar 2002 18:53:36 -0500; This list no longer operates with Majordomo software - it was converted to Mailman a couple months ago. When the conversion was done, every subscriber received a new "welcome message" with informatio; /archives//html/Amps/2002-03/msg00687.html (9,185 bytes)
10. [AMPS] New to the Amps list (score: 1): Author: k4ik@subich.com (Joe Subich, K4IK); Date: Tue, 22 Jan 2002 15:07:22 -0500; Tom, Does the AL-811 have provision for raising the plate voltage by 800 to 900 volts to be more compatible with the 572B? As I recall an 811 generally operate at 1200 - 1400 volts where the 572B li; /archives//html/Amps/2002-01/msg00173.html (8,023 bytes)
11. RE: [Amps] NCL 2000? (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Wed, 1 Oct 2003 02:36:08 -0400; If one needed to replace the 2x8122, it might be worthwhile looking at the Svetlana 4CX400. The tube is spec'd for 600 watts out in ICAS ... 1200 Watts for a pair ... with 2500 Volts on the plates. A; /archives//html/Amps/2003-10/msg00009.html (11,199 bytes)
12. RE: [Amps] Listed on ebay, 2 - HF RANGER 811 (UK) Linear Amplifier (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Sat, 15 Nov 2003 02:17:56 -0500; Unfortunately, since these are not "one off" amplifiers, and they do not seem to have FCC type acceptance, their importation to and use in the US is illegal. http://cgi.ebay.com/ws/eBayISAPI.dll?View; /archives//html/Amps/2003-11/msg00186.html (8,218 bytes)
13. RE: [Amps] HV fuse (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Mon, 19 Jul 2004 11:31:23 -0400; The US broadcast television transmitters using "inductive output tubes" (IOT) - essentially a single cavity output with a gridded electron gun - used triggered spark gaps to discharge the beam (anode; /archives//html/Amps/2004-07/msg00122.html (9,242 bytes)
14. RE: [Amps] Line Isolators for RF feedback (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Tue, 3 Aug 2004 23:26:28 -0400; Beware of the loss in the "beads" of the bead baluns. While they may not saturate, if there is substantial current on the outside of the coax you can see significant heating ... to the point of exce; /archives//html/Amps/2004-08/msg00028.html (8,264 bytes)
15. RE: [Amps] Audio BW -- Please just let us operate!! (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Fri, 27 Aug 2004 11:54:17 -0400; You're absolutely correct ... Double sideband AM and HiFi SSB with 4.5 and 6 KHz audio bandwidth are a complete waste of spectrum and are arguably illegal under rule 97.307(a): No amateur station tr; /archives//html/Amps/2004-08/msg00390.html (8,276 bytes)
16. RE: [Amps] Ebay sales (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Mon, 11 Oct 2004 10:35:20 -0400; There are those who would not want anyone to know they were bidding on a 3CX10K ... thus the reason for the hidden bidders list. Yes, the hidden list has a greater opportunity for "shill" bidding bu; /archives//html/Amps/2004-10/msg00146.html (7,522 bytes)
17. RE: [Amps] Re: Step-start calculation (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Sat, 20 Nov 2004 15:00:20 -0500; Problem is the rectifier is a Full Wave Doubler - not a Full Wave Bridge. Effective capacitance is 93/2 = 46.5 uF. 73, ... Joe, K4IK _______________________________________________ Amps mailing list; /archives//html/Amps/2004-11/msg00338.html (7,756 bytes)
18. RE: [Amps] Dx pedition amp ??? (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Wed, 1 Dec 2004 23:56:02 -0500; At 800 Watts CW output, you are seriously abusing that tube. The 8875 is rated for 300 watts plate dissipation, 800 W CW even in class C would be almost 400 watts of dissipation. Considering that the; /archives//html/Amps/2004-12/msg00020.html (7,500 bytes)
19. RE: [Amps] TL-922A - Loud Pop, Blown Fuses (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Sun, 5 Dec 2004 18:49:33 -0500; Except, if I recall correctly, the TL-922 puts the 3-500Z filaments in series. One cannot run the amplifier with only one tube! 73, ... Joe, K4IK _______________________________________________ Amps; /archives//html/Amps/2004-12/msg00092.html (8,731 bytes)
20. RE: [Amps] What is it called? (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Sat, 22 Jan 2005 12:02:59 -0500; Sounds like you're talking about Garolite ... it's a redish brown. Try McMaster-Carr ... www.mcmaster.com 73, ... Joe, K4IK _______________________________________________ Amps mailing list Amps@con; /archives//html/Amps/2005-01/msg00454.html (7,338 bytes)

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