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61. [AMPS] Need Info on LK-500 (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Thu, 8 Apr 1999 17:31:45 -0400; Hi folks, I have an opportunity to buy a used LK-500 from a local friend who will let me play around with it for a while before I decide on buying it. I haven't seen it yet. I'm not sure about the mo; /archives//html/Amps/1999-04/msg00167.html (9,174 bytes)
62. [AMPS] Parasitic suppressors/another question, (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sat, 10 Apr 1999 09:53:10 -0400; can be directly attributed to the operator rotating the band switch instead of the load control while tuning up. The physical layout of the tune, load and bandswitch controls makes it easy to turn th; /archives//html/Amps/1999-04/msg00215.html (10,912 bytes)
63. [AMPS] 87A Fault 17 (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sat, 10 Apr 1999 11:59:53 -0400; For a couple of years, I was getting intermittent fault #17 trips on my 87A while operating in contests, mostly on 10M and 15M. The manual describes this fault as "Abnormally low or high amplifier ga; /archives//html/Amps/1999-04/msg00223.html (12,157 bytes)
64. [AMPS] More on LK-550ZC (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sat, 10 Apr 1999 18:17:32 -0400; My friend who heard snap/crackle when he turned on his LK-550ZC that had sat idle for 3 1/2 years reports that there are no spider webs or insects inside the RF compartment and nothing there looks am; /archives//html/Amps/1999-04/msg00224.html (7,298 bytes)
65. [AMPS] 87A Fault 17; cause & cure (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Mon, 12 Apr 1999 14:52:37 -0400; Dick, Thanks for the notes on adjusting DRIVE/Po/ALC. Since my spike problem occurs most often in CW mode, it seems more likely that it isn't caused by misadjustment, but by a genuine problem with th; /archives//html/Amps/1999-04/msg00263.html (10,837 bytes)
66. [AMPS] Alpha/Power and Henry Radio (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Mon, 12 Apr 1999 15:11:59 -0400; and You can do that with an Alpha 89, 87A or 91b (soon to be 99.) In trying to find more info on the LK-550ZC, I searched the QST CD-ROMs and came across a whole bunch of Alpha ads from 1988-1989. R; /archives//html/Amps/1999-04/msg00264.html (8,151 bytes)
67. [AMPS] Re: Ground System suggested for QRO Amps (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Tue, 13 Apr 1999 22:02:45 -0400; Jim, I think all the Yaesus are built this way. You need to get one of those "Front End Savers". Here's a link: http://home1.gte.net/crlewis/FES.htm. I've heard very good things about these boxes. 7; /archives//html/Amps/1999-04/msg00285.html (7,526 bytes)
68. [AMPS] RF BURNS (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Thu, 15 Apr 1999 13:25:05 -0400; A good friend was over last night and we got to talking about HV mishaps. He said his worst experience happened while wiring up a new contest station. Evidently, the owner of the station had wired th; /archives//html/Amps/1999-04/msg00292.html (8,905 bytes)
69. [AMPS] power meter errors (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Thu, 29 Apr 1999 18:37:16 -0400; I know of at least two power meters that compensate for readout errors due to mismatch, and have other useful features as well. Unfortunately, both are rather hard to obtain. The Nye RFM-003 RF Power; /archives//html/Amps/1999-04/msg00456.html (11,136 bytes)
70. [AMPS] Line Wiring again -- subpanels? (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Tue, 9 Mar 1999 02:16:51 -0500; Hi folks. I'm returning to the reflector to learn some more about amps before I buy a second one. I've been reading the archives and see that the discussion certainly has been lively! I read the orig; /archives//html/Amps/1999-03/msg00178.html (11,376 bytes)
71. [AMPS] Line Wiring again -- subpanels? (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Tue, 9 Mar 1999 19:12:24 -0500; ? Warning: I am not an expert. . If the tower receives a healthy wiring. I would not connect the tower ground to the subpanel. Since bolts can be in the megavolts, I would have a plug/socket/20' serv; /archives//html/Amps/1999-03/msg00198.html (15,036 bytes)
72. [AMPS] Line Wiring again -- subpanels? (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Tue, 9 Mar 1999 19:53:49 -0500; take Yeah, that's actually part of my system. The 1/0 wire from the panel goes to one of the 12 tower electrodes (which are interconnected with 1/0 radials, all Cadwelded), where it is Cadwelded to; /archives//html/Amps/1999-03/msg00199.html (10,866 bytes)
73. [AMPS] Line Wiring again -- subpanels? (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Tue, 9 Mar 1999 20:01:16 -0500; Thanks for the helpful replies, folks. The unanimous verdict is that the ground and neutral must *not* be connected at the subpanel. The way I see it, after I disconnect them I have three choices: 1.; /archives//html/Amps/1999-03/msg00200.html (8,582 bytes)
74. [AMPS] Re: Sub-panels (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Tue, 9 Mar 1999 20:02:08 -0500; required more I found the instruction sheet, but the manufacturer's name and model number are not on it. I got them from a local electrical supply house. As I recall, they're made by some well-known; /archives//html/Amps/1999-03/msg00201.html (8,615 bytes)
75. [AMPS] Line Wiring -- resolution (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Wed, 10 Mar 1999 18:23:47 -0500; For those who are interested in things electrical... I trudged through the snow and removed the connection I had put between the ground and neutral bars in the tower subpanel and connected the surge; /archives//html/Amps/1999-03/msg00221.html (9,580 bytes)
76. [AMPS] 3CX800A7 plate current leakage (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sun, 14 Mar 1999 00:17:10 -0500; What's a reasonable value for plate current leakage for a healthy 3CX800A7 in GG with cathode bias voltage at cutoff? Is 17 mA OK, or would that indicate a leaky tube? 73, Dick, WC1M -- FAQ on WWW: h; /archives//html/Amps/1999-03/msg00277.html (7,204 bytes)
77. [AMPS] 3CX800A7 plate current leakage (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sun, 14 Mar 1999 17:23:17 -0500; False alarm. The tubes aren't leaking. See my next post on "87A Ip Meter Problem". 73, Dick, WC1M ? It should be under 500uA, Dick. What is the bias V? Have you tested the tube for leakage on a high-; /archives//html/Amps/1999-03/msg00288.html (8,195 bytes)
78. [AMPS] 87A Ip Meter Problem (long) (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Sun, 14 Mar 1999 20:11:51 -0500; Hi folks. Here's a problem I've encountered with amateur radio's most complex amp. Hopefully, I can resolve this tomorrow with some nominal test voltages from Alpha Power, but I thought perhaps the e; /archives//html/Amps/1999-03/msg00292.html (16,668 bytes)
79. [AMPS] 87A Ip Meter Problem (long) (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Mon, 15 Mar 1999 10:32:18 -0500; ? With 33v of cutoff bias, anode-current in healthy tubes should probably be under 50uA. My guess is that there is a leakage problem with both tubes. To find out for sure, a high-pot test is the best; /archives//html/Amps/1999-03/msg00311.html (9,659 bytes)
80. [AMPS] strange idling current (score: 1): Author: Dick Green" <dick.green@valley.net (Dick Green); Date: Mon, 15 Mar 1999 18:50:44 -0500; Yes, that's what I've seen on most op amps, but this one is in fact designed for a higher voltage supply. The op amp in question is a Motorola MC1536, which I found on a chip directory web site list; /archives//html/Amps/1999-03/msg00327.html (10,530 bytes)

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