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From: wrd@tekigm2.TEK.COM (Bill Dippert)
Newsgroups: comp.sys.atari.8bit
Subject: Atari 1200XL Chroma
Message-ID: <1375@tekigm2.TEK.COM>
Date: Wed, 14-Jan-87 19:35:08 EST
Article-I.D.: tekigm2.1375
Posted: Wed Jan 14 19:35:08 1987
Date-Received: Thu, 15-Jan-87 20:25:28 EST
Reply-To: wrd@tekigm2.UUCP (Bill Dippert)
Distribution: world
Organization: Tektronix, Inc., Beaverton, OR.
Lines: 23
Keywords: Q7 Emitter

Recently Richard Andrews answered how to hget chroma out on the 1200XL,
however, as I asked him:

Appreciated your answer.  However, one slight problem -- not being an
electronic engineer, I do know which is the emitter of Q7 on the 1200XL.
Having a spare mother board in front of me, I see that:

the left hand leg goes to C61 (? -- 1 is covered by component)
the middle leg goes to R31
the right hand leg goes to R43

Question:  which leg is the emitter?

If anyone else on the net has the answer, please post it.  I have previously
posted similar answers, but have tried to keep the answers in terms that even
I can understand -- then I figure anyone can do it.  Since the circuit board
has all components labelled, it is a fairly easy task to trace out each leg to
see where it goes, but to determine whether it is the emitter or not
(particularly - as I understand it - these transistors do not have a standard
configuration).  If I get an answer, I will post it, as Richard and I cannot be
the only ones using 1200XL's!

--Bill Dippert--