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41. [Amps] TS-440S Update (score: 1): Author: k7fm@teleport.com (COLIN LAMB); Date: Mon, 15 Apr 2002 5:53:19 -0700; We speak of ALC causing the problem - but ALC simply allows the problem to occur. The real problem is "flat-topping" during the instant of the first pulse - prior to ALC shutting down the amplifier; /archives//html/Amps/2002-04/msg00357.html (9,255 bytes)
42. [Amps] dead tube (score: 1): Author: k7fm@teleport.com (COLIN LAMB); Date: Sat, 6 Apr 2002 11:6:12 -0800; it? Hi Jim: Have one of your friends sell it "AS-IS" on eBay. They can truthfully say they have no knowledge of electronics and they do not know if it works or not. Probably bring $40. It takes awhi; /archives//html/Amps/2002-04/msg00617.html (6,771 bytes)
43. [Amps] transformer theory - winding your own (score: 1): Author: k7fm@teleport.com (COLIN LAMB); Date: Tue, 9 Apr 2002 20:3:8 -0700; For those of you interested in transformer theory and to see some interesting home wound transformers - including a toroid design, see the following website: http://www.geocities.com/water_transforme; /archives//html/Amps/2002-04/msg00618.html (6,565 bytes)
44. [Amps] Lightning (score: 1): Author: k7fm@teleport.com (COLIN LAMB); Date: Wed, 17 Apr 2002 5:3:58 -0700; Since we do not fully understand lightning, nor know when or where it will strike, I propose that we treat it as a parasitic or arc over. A giant parasitic suppressor made of nichrome wire and tuned; /archives//html/Amps/2002-04/msg00619.html (7,385 bytes)
45. [Amps] More Lightning (score: 1): Author: k7fm@teleport.com (COLIN LAMB); Date: Wed, 17 Apr 2002 6:3:13 -0700; I received an e-mail suggesting that my suggestion to use nichrome in a parasitic suppressor lacks sufficient testing because it has not been hi-pot tested. Upon reflection, I remembered that one N.; /archives//html/Amps/2002-04/msg00620.html (7,048 bytes)
46. [Amps] FS: Amp parts (score: 1): Author: COLIN LAMB" <k7fm@teleport.com (COLIN LAMB); Date: Sun, 3 Mar 2002 13:15:27 -0800; "I have the following parts for sale. All are in new unless otherwise noted. I was going to build an 8877 amplifier, but my XYL surprised me with an Alpha for Christmas" How much for your wife?; /archives//html/Amps/2002-03/msg00032.html (6,500 bytes)
47. [Amps] Phonetics (score: 1): Author: COLIN LAMB" <k7fm@teleport.com (COLIN LAMB); Date: Thu, 14 Mar 2002 07:00:13 -0800; I have found a simple approach to understanding phonetics of a dx = contest station. Sometimes I cannot understand the call sign of a = strong station. I figure half the problem is at my end and the; /archives//html/Amps/2002-03/msg00299.html (7,376 bytes)
48. [Amps] Phoenitcs (score: 1): Author: COLIN LAMB" <k7fm@teleport.com (COLIN LAMB); Date: Thu, 14 Mar 2002 07:06:44 -0800; I forgot an even simpler approach, although I try not to practice it = often. If you cannot understand the phonetics, simply tune up on the dx station = frequency and whistle a bit with a few "testin; /archives//html/Amps/2002-03/msg00300.html (6,724 bytes)
49. [Amps] Interesting Zero Bias Tube - the Amperex ZB120 (score: 1): Author: k7fm@teleport.com (COLIN LAMB); Date: Tue, 26 Mar 2002 18:47:5 -0800; Here are the specifications of an interesting tube - the Amperex ZB120. ZB means zero bias. It is: "especially designed for Class B amplification. Can be used as linear r.f. power amplifier." It has; /archives//html/Amps/2002-03/msg00615.html (7,116 bytes)
50. [AMPS] Thanks for BIRD meter info! (score: 1): Author: k7fm@teleport.com (Lamb); Date: Mon, 11 Feb 2002 19:31:05 -0800; "Don't forget that to measure VSWR, you need a slug for "reflected" reading that's several times more sensitive than the one used for "forward" power. If you're a Bird user, you already knew that...!; /archives//html/Amps/2002-02/msg00097.html (7,905 bytes)
51. [AMPS] Thanks for BIRD meter info! (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Fri, 15 Feb 2002 08:49:19 -0800; "I have an even better spin on this... you can save even putting the short circuit on the outside and even needing RF drive to energise it! Disconnect the antennas, feeders, HF rig (driver) - you can; /archives//html/Amps/2002-02/msg00156.html (8,954 bytes)
52. [AMPS] Alpha 78 (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sat, 23 Feb 2002 08:36:17 -0800; This is a multi-part message in MIME format. --=_NextPart_000_007D_01C1BC45.29121220 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello: I converted a 76; /archives//html/Amps/2002-02/msg00241.html (16,145 bytes)
53. [AMPS] Alpha 78 (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sat, 23 Feb 2002 08:46:53 -0800; "? As I understand it, the larger anode cooler diameter limits it to two 3cx800s. The larger coolers also requires moving the sockets farther apart. Since the 78 has no tuned input, I would consider; /archives//html/Amps/2002-02/msg00242.html (8,273 bytes)
54. [Amps] Oil cooled (score: 1): Author: COLIN LAMB" <k7fm@teleport.com (COLIN LAMB); Date: Tue, 26 Feb 2002 18:50:06 -0800; Boy, that brings back memories. I ran 4 of them at over 200 watts input for over a year. Never replaced any of them. I still have them and the amp. I only ran 1,000 volts, though. All driven by a sin; /archives//html/Amps/2002-02/msg00294.html (8,929 bytes)
55. [AMPS] Chassis (score: 1): Author: k7fm@teleport.com (Lamb); Date: Tue, 1 Jan 2002 08:39:58 -0800; Cutting holes for sockets and various other parts on an amplifier require a certain amount of tools. It really does not take much more to cut the entire chassis - just the right size. Aluminum panels; /archives//html/Amps/2002-01/msg00004.html (7,681 bytes)
56. [AMPS] HB Chassis (score: 1): Author: k7fm@teleport.com (Colin Lamb); Date: Wed, 02 Jan 2002 10:51:57 -0800; Square holes can be cut with a good drill press and a milling table. this table can be cranked in both directions while you are using a milling bit. These tables are available from the tool companies; /archives//html/Amps/2002-01/msg00019.html (7,744 bytes)
57. [AMPS] HV Transformer (score: 1): Author: k7fm@teleport.com (Lamb); Date: Wed, 2 Jan 2002 14:06:00 -0800; I want to second Phil's comments about selecting the right transformer first. Although I love to use the parts I have, there is nothing worse than building a nice amplifier around an existing large t; /archives//html/Amps/2002-01/msg00025.html (7,625 bytes)
58. [AMPS] I did a dumb thing! (score: 1): Author: k7fm@teleport.com (Lamb); Date: Fri, 4 Jan 2002 05:24:19 -0800; If, despite your blunder, you predecease your 3-500 tubes, then we can say that there was no serious long term effect. However, a full evalutation cannot be made of the consequences until either you; /archives//html/Amps/2002-01/msg00045.html (7,379 bytes)
59. [AMPS] Power Limitations in Other Countries (score: 1): Author: k7fm@teleport.com (Lamb); Date: Sat, 5 Jan 2002 07:55:19 -0800; Power Limits? The Communications Act of 1934 says that you cannot use any more power than necessary to communicate. That means on weak signals or heavy qrm or competition, you are limited only by you; /archives//html/Amps/2002-01/msg00061.html (7,928 bytes)
60. [AMPS] GOOD FOR A LAUGH! I can't believe this. (score: 1): Author: k7fm@teleport.com (Lamb); Date: Wed, 23 Jan 2002 07:12:37 -0800; This was his "normal" operation because he was a "professional military operator" and he had the throttle up at emergency war position. And, it says he had two fans in the summer. Does that mean he t; /archives//html/Amps/2002-01/msg00181.html (7,943 bytes)

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