Subject: TOHM CAMAC power supply fixed
Ioanni.Katsavounidis@lngs.infn.it
Date: Tue Sep 21 1999 - 09:24:35 EDT
Ciao a tutti,
The TOHM CAMAC Kinetic Systems, Model 1500 power supply that broke
during last weekend (was giving +10.2V on the +12V line) just got fixed.
The broken components were located on the positive voltage regulator
card - these are two (2) 2N3054 transistors. The power supply has tested
OK under the "standard" +5A load (together with a 3A load on the -12V
line). It is now located on the calibration uVAX crate (QVT). There is
also another good spare located on the "BBUONO's" self.
For the record, these 2 transistor had normal diode voltage drops,
but when used as Q3 (= the transistor for the +12V line on the regulater
card) had their voltage decreasing from 12.5V -> 11.2V within 1 minute.
A presto,
Ioannis
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