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81. [AMPS] Floating Grids (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Mon, 6 Nov 2000 15:18:44 +0100; With some socket, also the actual method to ground grid is prone to have inductance, and inductive reactance yes increases with frequency. With proper bypassing capacitors and short leads, like with; /archives//html/Amps/2000-11/msg00071.html (7,851 bytes)
82. [AMPS] Floating Grids (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Mon, 6 Nov 2000 15:39:39 +0100; It happens if catode becomes floating, but generally it does not. Transceivers, IP shunt resistor (and meter) and bias zener where never replaced after grid coil opened in the SB220 and TL 922 we re; /archives//html/Amps/2000-11/msg00072.html (7,827 bytes)
83. [AMPS] Floating Grids (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Tue, 7 Nov 2000 09:29:04 +0100; As I told in my message, all depends by the tube and its socket. When a tube socket is mechanically unsuitable for short, low inductance ground connection, or inside the tube itself there's a long l; /archives//html/Amps/2000-11/msg00081.html (8,572 bytes)
84. [AMPS] Floating Grids (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Tue, 7 Nov 2000 09:30:20 +0100; As I told in my message, all depends by the tube and its socket. When a tube socket is mechanically unsuitable for short, low inductance ground connection, or inside the tube itself there's a long l; /archives//html/Amps/2000-11/msg00082.html (8,590 bytes)
85. [AMPS] AL-1500 Problem (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Wed, 15 Nov 2000 12:52:43 +0100; it, it amps and power about 90 move 700Ma. Could be a problem of readings, sampling and related circuits, check for wattmeter accuracy too. With 0.7 or 1A of plate current the input power is over 3; /archives//html/Amps/2000-11/msg00151.html (8,431 bytes)
86. [AMPS] possible amp tube (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Sat, 18 Nov 2000 11:03:52 +0100; One of the ipotesys could be that under a commercial perspective smaller transmitting tubes (up to 5/10 Kw) are already at the end of their existance and also thet Russia prices rised too much and to; /archives//html/Amps/2000-11/msg00202.html (7,657 bytes)
87. [AMPS] Grounds (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Mon, 20 Nov 2000 22:33:43 +0100; On my opinion it has a small meaning talking about potentials between ground and neutral, what counts is the amount of current that eventually flows and this has to be kept minimal. Differential safe; /archives//html/Amps/2000-11/msg00243.html (10,129 bytes)
88. [AMPS] Hi Power Connectors (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Mon, 20 Nov 2000 22:38:10 +0100; It depends by frequency and duty cycle. Professionally, PL259 is not considered at all, while N is not considered as an Hi power connector. 73, Mauri I4JMY specifications -- FAQ on WWW: http://www.co; /archives//html/Amps/2000-11/msg00244.html (8,662 bytes)
89. [AMPS] Hi Power Connectors (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Tue, 21 Nov 2000 22:39:41 +0100; I believe it. For a few minutes, I've done tests with N up to 6 Kw @ 100 MHz (continuous carrier) with no failures or damages. This is possible with properly installed N connectors althought I wouldn; /archives//html/Amps/2000-11/msg00270.html (11,291 bytes)
90. [AMPS] Hi Power Connectors (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Wed, 22 Nov 2000 11:16:51 +0100; I don't know any serious manufacturer of professional equipment that uses PL259 in something UHF that has been designed in the last 20 Years. For example, even solid state 1Kw HF amplifiers by Motoro; /archives//html/Amps/2000-11/msg00283.html (9,458 bytes)
91. [AMPS] Hi Power Connectors (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Wed, 22 Nov 2000 12:03:39 +0100; creates more equivalent a Point totally missed, a current of 6 A is 6 A. (5.5 for 1500W) If a connection is proper to withstand 6A @ 50 MHz it doesn't heat and there is no present or future damage.; /archives//html/Amps/2000-11/msg00285.html (10,190 bytes)
92. [AMPS] Hi Power Connectors (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Wed, 22 Nov 2000 12:18:42 +0100; common, or equipment I've recently. The N connector is widely used up to 0.8-1 Kw. Above 800W and up to a couple of Kw the preferred connectors are 7-16 (mostly devoted for TV applications and in Eu; /archives//html/Amps/2000-11/msg00286.html (9,719 bytes)
93. [AMPS] Hi Power Connectors (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 23 Nov 2000 15:16:56 +0100; below! even at 50Hz ratings. If the contact resistance is low enough not to produce a noticeable (dangerous) heat along itself, within reasonable limits, pin size alone and its receptacle aren't eno; /archives//html/Amps/2000-11/msg00335.html (10,130 bytes)
94. [AMPS] Re: Circuit for measuring RF voltage... (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Thu, 23 Nov 2000 23:45:53 +0100; +/-5% excluding analogue tone. Add known Any indirect measurement, i.e. evaluating RMS power through a voltage, needs calibration. So called in-line wattmeters are actually voltage/current meters, p; /archives//html/Amps/2000-11/msg00348.html (8,705 bytes)
95. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Tue, 28 Nov 2000 15:47:02 +0100; Statistically, the overall reliability is also an inverse function of the number of components used. The point if adopting some newer and more complex circuit, other than for didactical purposes, sho; /archives//html/Amps/2000-11/msg00397.html (10,751 bytes)
96. SV: [AMPS] SB-220 Glitch Resistor ??? (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Tue, 28 Nov 2000 16:55:18 +0100; My point was: "is it worth the effort to replace a rough but simple resistor with a more complex circuit using of active and passive components ?" 73 Mauri I4JMY of than of jacket. -- FAQ on WWW: htt; /archives//html/Amps/2000-11/msg00403.html (10,296 bytes)
97. [AMPS] Hi Power Connectors (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Wed, 29 Nov 2000 13:35:41 +0100; On my opinion, for Hi power applications best available connectors are EIA flange connectors (7/8", 1-5/8" etc.) that are built for a lot of cables, from the small RG213 and up to 7/8" lines, and eve; /archives//html/Amps/2000-11/msg00423.html (9,223 bytes)
98. [AMPS] Low Pass Filter (score: 1): Author: i4jmy@iol.it (Maurizio Panicara); Date: Wed, 29 Nov 2000 23:04:54 +0100; This is a multi-part message in MIME format. --=_NextPart_000_00C2_01C05A58.C8F38BC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Generally it's not a ma; /archives//html/Amps/2000-11/msg00438.html (11,796 bytes)
99. [AMPS] Low Pass Filter (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Thu, 30 Nov 2000 10:43:04 +0100; amps@contesting.com, "'Maurizio Panicara'" <i4jmy@iol.it> harmonic Regulations 01 on Because the requirements involve the equipment itself, but practically speaking even a -40 dB rejection combined; /archives//html/Amps/2000-11/msg00445.html (9,116 bytes)
100. [AMPS] A Question re Power Levels (score: 1): Author: i4jmy@iol.it (i4jmy@iol.it); Date: Mon, 9 Oct 2000 09:57:23 +0200; Stated an impedance ratio, the PI tune capacitor, the load capacitor and the coil have only one solution for each chosen Q. To mantain the same PI circuit, lowering plate voltage requires a decrease; /archives//html/Amps/2000-10/msg00138.html (8,943 bytes)

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