Re: Question: R7903 Cap Rectifier Board 130v supply

Denton, Adam (Exchange)

I find it mind boggling that transistors for driving lamps
are selected from a standard transistor type,
e.g. Q238 in 7904 is selected from MPS918.
Are you serious?!! MPS918 is used as a LAMP DRIVER??!!
My god, MPS918 is a rather delicate RF transistor
(VCEo = 15V, fT = 600MHz, Ic = 50mA). Just about the
LAST part I would ever choose to drive a lamp. Ouch!

To my mind that shows a lack of adult supervision in design
Scary. Did they employ the same lackey in the design of
the now-infamous 24xx U-800? :-O


From: Miroslav Pokorni []
Sent: Friday, October 31, 2003 10:42 PM
To:; Joe Sleator
Subject: Re: [TekScopes] Question: R7903 Cap Rectifier Board 130v supply

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