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Old 10th Mar 2021, 11:40 am   #11
KeithsTV's Avatar
Join Date: Aug 2007
Location: South Bradford, West Yorkshire, UK.
Posts: 2,422
Default Re: Need an Isolation Transformer for CTX-S (Philips 14CT2006)

Here's the modified circuit which includes the audio input which I think would be essential if you intend using it with a VCR.

As only one op amp is needed the quad op amp IC2 can be replaced by a single op amp such as a 741 or TL071. The pinout shown is OK for a 741 or TL071. If you use a different op amp check the pinout.

The unused inputs to the 4053 switch, pins 1,3,2 and 5 must be grounded.

I've also corrected the orientation of D6 & D9 and added a 12k resistor in series with D8 in the time constant switch control line.

Attached Files
File Type: pdf SCART mod 2.PDF (574.8 KB, 18 views)
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