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From: jerryw@teksce.SCE.TEK.COM (Jerry Willard)
Newsgroups: sci.electronics
Subject: Prescaler IC needed
Message-ID: <2986@teksce.SCE.TEK.COM>
Date: 10 Jan 90 19:33:58 GMT
Sender: jerryw@teksce.SCE.TEK.COM
Reply-To: jerryw@teksce.SCE.TEK.COM (Jerry Willard)
Organization: Tektronix, Inc., Beaverton,  OR.
Lines: 14

I'm trying to fix a TV tuner that has a bad prescaler IC.  The set isn't
very old but the IC that's in it is apparently already obsolete.  I haven't
been able to find a replacement anywhere.  I need help.

The part is a Plessey SP4020 (or Siemens SDA4020).

Plessey has another part (that is also now not available) that is a close
second: SP4634.

All of the other parts I can get won't work.   Can anyone suggest where I
can get one of these parts?

Jerry Willard,  Tektronix
jerryw@teksce.SCE.TEK.COM