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Total 108 documents matching your query.

101. [AMPS] Strange Tube Problem (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Wed, 23 Jun 1999 08:56:13 +0200; One wonders whether it's safe to over engineer all voltage breakdown components when home brewing. Rather lose a switch or cap than a tube. The amp could be very parasitic and show no readily visible; /archives//html/Amps/1999-06/msg00588.html (7,641 bytes)
102. [AMPS] SMPSU for TWT's (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Mon, 21 Dec 1998 13:37:02 +0200; The article mentioned previously is: "Power Supply unit for Travelling-Wave Tubes" by Andreas Schaumburg, DF7ZW, appeared in VHF Communications 4/93. My copy is rather poor, and I can't find the orig; /archives//html/Amps/1998-12/msg00306.html (7,370 bytes)
103. Fw: [AMPS] Anode load line calculations. (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Mon, 21 Dec 1998 14:23:29 +0200; This is not peculiar to tubes. And is why the ICOM IC-781 running the PA transistors at 28 V achieves 37 dB IMD, compared to the typical 24-28 dB from 13 V transistors (IC-565, 476, Yeasu 847, 920, e; /archives//html/Amps/1998-12/msg00308.html (9,204 bytes)
104. [AMPS] Linearity in 6m linear (score: 1): Author: itr@nanoteq.co.za (Ian Roberts); Date: Tue, 22 Dec 1998 09:52:29 +0200; It is.... Now to inform this gentleman without collecting 5's. 73 Ian ZS6BTE -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUE; /archives//html/Amps/1998-12/msg00318.html (8,923 bytes)
105. [AMPS] Tetrodes and triodes in class E? (score: 1): Author: ITR@nanoteq.co.za (Ian Roberts); Date: Wed, 04 Nov 1998 08:06:38 +0200; Is it possible to operate tubes in class E, assuming that the HT can be switched at a RF rate? For CW only. Ian, ZS6BTE -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesti; /archives//html/Amps/1998-11/msg00067.html (6,600 bytes)
106. [AMPS] TWT supplies (score: 1): Author: ITR@nanoteq.co.za (Ian Roberts); Date: Thu, 19 Nov 1998 09:54:09 +0200; A German author published complete details for supplying a TWT at up to 7kV, with protection/sequencing, in VHF Communications some years ago. Switch mode it was too. I'll scratch it out if there is; /archives//html/Amps/1998-11/msg00270.html (7,270 bytes)
107. [AMPS] Beryllium in 2C39's and 4CX250fg's? (score: 1): Author: ITR@NANOTEQ.co.za (Ian Roberts); Date: Fri, 02 Oct 1998 13:20:38 +0200; I've been given 3 dozen of the 250's, and have a number of the 39's or variants. Vaguely readable on some of the EIMAC 250's are washed-out labels referring to a hazard. The Chinese versions (China E; /archives//html/Amps/1998-10/msg00010.html (7,911 bytes)
108. [AMPS] re: beryllium in tubes (score: 1): Author: ITR@NANOTEQ.co.za (Ian Roberts); Date: Mon, 05 Oct 1998 08:59:42 +0200; Thanks to the gentlemen that responded with their OPINIONS. Here is another submission, in direct conflict, also incorporating another dimension as a side shoot! I think the point here is that electr; /archives//html/Amps/1998-10/msg00016.html (8,709 bytes)

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