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1. [Amps] eb-104 bias question (score: 1): Author: Dan Sawyer <dansawyer@earthlink.net>; Date: Sun, 16 Jan 2011 13:17:03 -0800; All, I am building an eb-104. After several false starts, assembly errors, the board is up and running at low power with two devices. The current question is related to the bias circuit. I am using a; /archives//html/Amps/2011-01/msg00164.html (6,891 bytes)
2. Re: [Amps] eb-104 bias question (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Sun, 16 Jan 2011 17:31:10 -0700; Dan, The EB-104 uses an MC1723 voltage regulator. D5 is a 28 volt zener for the input of the regulator assuming you are obtaining the bias voltage from the 50 volt supply. I assume you have removed D; /archives//html/Amps/2011-01/msg00165.html (8,379 bytes)
3. Re: [Amps] eb-104 bias question (score: 1): Author: Dan Sawyer <dansawyer@earthlink.net>; Date: Sun, 16 Jan 2011 21:00:22 -0800; Thank you for all for your replies. They uncovered an interesting series of errors. I removed R6 and the result was the bias surged and wiped out a MOSFET - unambiguous 'white flash'. Whoops. The IC; /archives//html/Amps/2011-01/msg00167.html (10,413 bytes)
4. Re: [Amps] eb-104 bias question (score: 1): Author: "Baruch Zilbershatz" <4z4rb@bezeqint.net>; Date: Mon, 17 Jan 2011 07:37:17 +0200; There is more to that board. Make sure that the bypass caps near the ferrite beads where the 50v goes are much better than the one u got from CCI put more caps 0.1/200v on that line . Also make small; /archives//html/Amps/2011-01/msg00168.html (11,037 bytes)

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