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21. Re: [Amps] 220V service for amplifier (score: 1): Author: ka1xo@juno.com; Date: Thu, 4 Dec 2003 09:33:39 GMT; Dear Paul, I read your posting about the Alpha 77 series primary a.c. wiring shortcomings. My question is how does this affect taking my 77Sx into hotel rooms? Rich Measures already suggested using t; /archives//html/Amps/2003-12/msg00051.html (8,558 bytes)
22. Re: [Amps] 3-500Z plate durability (score: 1): Author: ka1xo@juno.com; Date: Wed, 10 Dec 2003 00:28:34 GMT; In light of the observation of internal parts becoming so hot they glow a dull red in glass envelope tubes, and the ensuing call for comments thereon, please allow a reflection from the last thirty f; /archives//html/Amps/2003-12/msg00158.html (8,894 bytes)
23. Re: [Amps] Home Built Amp (score: 1): Author: ka1xo@juno.com; Date: Thu, 11 Dec 2003 11:27:27 GMT; Hey! I'm hereby cancelling the order for my new Sx77 for hotel room-portable DXpedition use. The homebrew on ebay just fits the bill. And the bid is still hovering around $15.50. Why spend $5K on a n; /archives//html/Amps/2003-12/msg00173.html (7,324 bytes)
24. Re: [Amps] (score: 1): Author: ka1xo@juno.com; Date: Mon, 15 Dec 2003 04:18:16 GMT; We use Bird 43's for the NYC AWS 850/1900 MHz. overlay project, and they give acceptable sweeps up to 2 Gigs. Only Verizon has 1KW amplifiers on line for GSM. Our PA's are max 100W. So I don't know i; /archives//html/Amps/2003-12/msg00245.html (6,800 bytes)
25. Re: [Amps] 220VOLT LINE...Redux and ?? (score: 1): Author: ka1xo@juno.com; Date: Mon, 15 Dec 2003 04:45:01 GMT; Dear Mike, The Henry 2KD at 220vac input is said to consume 15 amps, tops. The #10AWG feed from your distribution panel, at 50 feet, is plenty of circular mils to not heat up when your key is down. T; /archives//html/Amps/2003-12/msg00246.html (7,395 bytes)
26. Re: [Amps] Buck boost transformer (score: 1): Author: ka1xo@juno.com; Date: Thu, 18 Dec 2003 07:09:03 GMT; Gary, Most commercial stations I've worked at use B&B XFMRs. Even the 3 phase XMTR lines had BnB's. Hal _______________________________________________ Amps mailing list Amps@contesting.com http://li; /archives//html/Amps/2003-12/msg00290.html (6,600 bytes)
27. Re: [Amps] Swan Mark 1 Resting Plate Current (score: 1): Author: ka1xo@juno.com; Date: Mon, 22 Dec 2003 23:47:35 GMT; Dear Bill, How is your grid current situation? Did you monitor Ig before you did the modifications? The resting current should adjust. Hal Mandel KA1XO/2 _____________________________________________; /archives//html/Amps/2003-12/msg00345.html (6,410 bytes)
28. [Amps] Vacuum Relays for Sale (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Sat, 27 Dec 2003 00:33:48 -0500; Sirs: Please see: http://www.anthonywelsh.com Tony has two different vacuum relay types for sale with coil voltages from 12 to 24 VDC. Additionally, in my new tetrode amplifier I am using two Jenning; /archives//html/Amps/2003-12/msg00408.html (6,733 bytes)
29. [Amps] DUMMY LOADS (score: 1): Author: "Harold B. Mandel" <ka1xo@juno.com>; Date: Sun, 28 Dec 2003 11:29:41 -0500; Gentlemen, My paint can oil-filled dummy load does not provide the time duration necessary to achieve perfect tuning as it gets very hot and pops off the vent cap in addition to changing its internal; /archives//html/Amps/2003-12/msg00422.html (6,947 bytes)
30. [Amps] Regulated HV and Bias Supplies (score: 1): Author: ka1xo@juno.com; Date: Wed, 31 Dec 2003 09:09:57 GMT; Gentlemen, In the current thread one of us mentioned real-time situations versus theoretical circumstances. For me, this discussion is very apropos because of the project I am involved with currently; /archives//html/Amps/2003-12/msg00477.html (9,046 bytes)
31. [Amps] Replacment Blower Sought (score: 1): Author: ka1xo@juno.com; Date: Fri, 2 Jan 2004 00:49:42 GMT; Gentlemen, Would you please help me locate a Rotron VS37A2-R1 or suitable substitute for the 77Sx series? Thanks, Hal KA1XO << KA1XO@JUNO.COM >> _______________________________________________ Amps m; /archives//html/Amps/2004-01/msg00011.html (6,182 bytes)
32. [Amps] Step start resistors, another solution (score: 1): Author: ka1xo@juno.com; Date: Tue, 6 Jan 2004 01:22:45 GMT; Sirs, When talking about soft starts and step starts, and hearing Alek mention the Emtron system I must join the contingent and add my experiences and commendations. The Emtron system of soft start t; /archives//html/Amps/2004-01/msg00062.html (6,813 bytes)
33. [Amps] ALPHA 77 RF POWER CAPACITORS (score: 1): Author: ka1xo@juno.com; Date: Thu, 8 Jan 2004 12:18:53 GMT; Gentlemen, Not too long ago in this reflector a discussion was had about certain RF power capacitors being prone to failure in the ALPHA 77Sx amplifier, more specifically thus: From what I see of the; /archives//html/Amps/2004-01/msg00088.html (8,538 bytes)
34. [Amps] O/SYS GLITCH (score: 1): Author: ka1xo@juno.com; Date: Fri, 9 Jan 2004 02:03:04 GMT; Gents, The requirement in our market is that zeroes need to be slashed because there are properties with identifiers using the letter O and the numeral Zero in places that interchange, and I had my k; /archives//html/Amps/2004-01/msg00097.html (6,926 bytes)
35. Re: [Amps] Fw: Check up for SB200 (score: 1): Author: ka1xo@juno.com; Date: Fri, 9 Jan 2004 07:48:56 GMT; Dear Stu, Isn't Pat Stein from Commander Amplifiers just North of you in Ohio? Hal Mandel KA1XO _______________________________________________ Amps mailing list Amps@contesting.com http://lists.cont; /archives//html/Amps/2004-01/msg00101.html (6,236 bytes)
36. [Amps] M.O.V.'s (score: 1): Author: ka1xo@juno.com; Date: Fri, 9 Jan 2004 11:22:20 GMT; Some time ago, mention was made about using an MOV near the power amplifier tube as protection against transient surges, perhaps in the filament area. Looking at Mouser's MOV selection, the reader is; /archives//html/Amps/2004-01/msg00103.html (6,565 bytes)
37. Re: [Amps] Homebrew "Hi-Pot" design issues (score: 1): Author: ka1xo@juno.com; Date: Sat, 10 Jan 2004 00:58:57 GMT; Dear Jim, I wonder how a flyback transformer setup from a large-screen CRT color television set would suffice for a source of HV at a pittance of amperage? You're dealing with 25 ~ 35 KV on them. Hal; /archives//html/Amps/2004-01/msg00119.html (7,350 bytes)
38. Re: [Amps] Homebrew "Hi-Pot" design issues (score: 1): Author: ka1xo@juno.com; Date: Sat, 10 Jan 2004 07:16:37 GMT; http://www.discovercircuits.com/F/flyfack.htm This is a website that discusses the "25 ~ 30 KV Power Supply." With such a tiny amperage requirement the regulation and control of the primary circuitry; /archives//html/Amps/2004-01/msg00121.html (7,409 bytes)
39. [Amps] RF Power Capacitors (score: 1): Author: ka1xo@juno.com; Date: Mon, 12 Jan 2004 01:21:09 GMT; Would somebody recommend a source of transmitting RF Power capacitors that would handle 5 or 6KV, provide about 2000pF, carry 11 amps and be suitable plate blockers for 2 8877's, please? There are a; /archives//html/Amps/2004-01/msg00129.html (6,289 bytes)
40. [Amps] Transformer varnish removal (score: 1): Author: ka1xo@juno.com; Date: Thu, 15 Jan 2004 05:58:36 GMT; At Home Cheapo you will find gallon cans of Methyl Ethyl Ketone, quart cans of Acetone, of Toluol or Toluene, and of isopropyl alcohol. Try not to smoke, and don't do this in the kitchen or basement; /archives//html/Amps/2004-01/msg00155.html (8,325 bytes)

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