Re: 7104 readout issue


Steven Bender
 

Sean,

A friend of mine found a burned resistor and bad TO-5 metal can transistor on the Readout Board in a military version of the 7603. The R was 3.9k, the TO-5 can something like a 2n2905 or 2n3440 with an OEM number. Maybe examine / check for those parts, if that transistor loses beta over time, it may overheat the R, then self destruct causing a loss of display.

Steven

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