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References: [ +from:Peter_Chadwick@mitel.com: 967 ]

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81. [AMPS] Fan motor capacitors (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 7 Feb 2001 08:51:08 -0000; As usual, it all depends. Some motors use a centrifugal switch to switch the capacitor out when it has got to speed, so the cap is just there for starting. Usually, these caps are in the 20 - 100 mFd; /archives//html/Amps/2001-02/msg00174.html (7,967 bytes)
82. [AMPS] rheostats (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 7 Feb 2001 16:45:30 -0000; John, What do you use on your big amps? I would guess something slightly more sphisticated than a rheostat...... 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@con; /archives//html/Amps/2001-02/msg00179.html (7,052 bytes)
83. [AMPS] rheostats (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 7 Feb 2001 17:11:36 -0000; Maybe, but a rheostat for a tube with a 5kW filament is not the best way.......even if you're not in California where you can't waste that much power! 73 Peter G3RZP -- FAQ on WWW: http://www.contest; /archives//html/Amps/2001-02/msg00184.html (7,201 bytes)
84. [AMPS] SB-220: Operate/Standby Switch (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Fri, 9 Feb 2001 08:07:29 -0000; It all depends on how creative your accounting is at hiding real costs. A $6 rheostat has to be ordered by purchasing. It has to be unpacked and placed in stores. It has to be issued to the line and; /archives//html/Amps/2001-02/msg00196.html (9,672 bytes)
85. [AMPS] switches (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 12 Feb 2001 09:49:52 -0000; Tom's points are very interesting: I've always been accustomed to switches where you actually design them yourself on the templates provided by the manufacturer, so you can decide on make before brea; /archives//html/Amps/2001-02/msg00232.html (9,031 bytes)
86. [AMPS] switches (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 12 Feb 2001 10:56:44 -0000; To cover 80 through 10, you need roughly a 10 to one variation in inductance. However, the coil resistance stays the same, so the unloaded Q goes down at the 'low inductance' end - if everything else; /archives//html/Amps/2001-02/msg00234.html (8,261 bytes)
87. [AMPS] test (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 19 Feb 2001 13:04:31 -0000; -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com; /archives//html/Amps/2001-02/msg00237.html (6,802 bytes)
88. [AMPS] switches (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 20 Feb 2001 08:01:24 -0000; I sent this last week but it didn't get through. This is very true. It should be noted that both Tom and I said 'can', however, and not necessarily that the problem will occur. If it does happen, the; /archives//html/Amps/2001-02/msg00259.html (8,125 bytes)
89. [AMPS] Creepy Amplifier (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 20 Feb 2001 08:36:58 -0000; I'd be inclined to suspect tubes producing some reverse grid current. However, have you measured the bias at the grid pin? (Put a series resistor or an RF Choke in series with the meter. A digital me; /archives//html/Amps/2001-02/msg00260.html (7,900 bytes)
90. [AMPS] switches (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 22 Feb 2001 13:49:15 -0000; Actually, it's a pretty fundamental distinction in this case. A parasitic resonance occurring in the partially short circuited tank circuit could lead to flash over without any parasitic VHF oscillat; /archives//html/Amps/2001-02/msg00298.html (7,965 bytes)
91. [AMPS] k2riw 2m amp! (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 26 Feb 2001 13:09:12 -0000; What's the rated 3rd order IMD of each of these amplifiers at 750w PEP out? 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests:; /archives//html/Amps/2001-02/msg00348.html (8,487 bytes)
92. [AMPS] Advice On Homebrewing Chassis Please (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 2 Jan 2001 09:06:07 -0000; Being too mean to have numbered drills as well as metric and fractions, I cheat a bit by drilling undersize and reaming. A hand held taper reamer does the job nicely..... 73 Peter G3RZP -- FAQ on WWW; /archives//html/Amps/2001-01/msg00032.html (7,052 bytes)
93. [AMPS] Himu triode 4-400A distorsion products?? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 2 Jan 2001 10:50:47 -0000; Even then, you're pushing things to get more than about 400 watts out with reasonable linearity. In fact, nearer 4kV is better. 73 Peter G3RZP -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submis; /archives//html/Amps/2001-01/msg00035.html (7,759 bytes)
94. [AMPS] Himu triode 4-400A distorsion products?? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 2 Jan 2001 12:17:01 -0000; All my 4-400s have metal anodes (Eimac, Penta and a Siemens). The Siemens one surprises me - I'd have expected graphite.... I use a single 4-400 in gg on 10m. I found that it needs about 3.7 - 3.8kV; /archives//html/Amps/2001-01/msg00038.html (8,415 bytes)
95. [AMPS] Himu triode 4-400A distorsion products?? (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 2 Jan 2001 15:48:26 -0000; I guess it depends on how you define 'common'. My 4-250 amp has a custom made switch, suggesting the manufacturer had problems, too. (It's the PA deck from a military tx) I've seen suitable switches; /archives//html/Amps/2001-01/msg00046.html (8,200 bytes)
96. [AMPS] 77SX (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 3 Jan 2001 09:00:11 -0000; Paul's comments on open circuit neutrals causing problems bring a wry smile. That's because I've been told by the elctricity people that such an occurrence is so rare that it needn't be worried about; /archives//html/Amps/2001-01/msg00089.html (8,092 bytes)
97. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 4 Jan 2001 08:53:19 -0000; I'm constantly surprised at how bad the key clicks are from modern transceivers. I've been told it's because of complaints from contesters/DX ers that rise and fall times of the order of 5msec are to; /archives//html/Amps/2001-01/msg00121.html (9,840 bytes)
98. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Thu, 4 Jan 2001 14:03:49 -0000; Is this phenomena peculiar only to Icom rigs, or do Yaesu and Kenwood do it also? Funny, these rigs - slow attack on ALC, too fast a rise on the rising edge of the keying waveform...........somebody; /archives//html/Amps/2001-01/msg00126.html (9,260 bytes)
99. [AMPS] Comments please (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 15 Jan 2001 10:56:06 -0000; Paul asked : I've been on holiday for a week, so only just read the e-mails....and yes, thanks for asking, it was fine and the autotuning on my antenna tuner is now finished and working! I tried reed; /archives//html/Amps/2001-01/msg00356.html (8,074 bytes)
100. [AMPS] Output Pulse from ICOM 706 (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Mon, 15 Jan 2001 11:05:47 -0000; The advertisers are and publishers are in a cleft stick though - they heavily rely on each other. In point of fact, relatively few amateurs have any problem with these design faults. Mark commented:; /archives//html/Amps/2001-01/msg00357.html (9,866 bytes)

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