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Old 9th Mar 2021, 8:57 am   #9
KeithsTV's Avatar
Join Date: Aug 2007
Location: South Bradford, West Yorkshire, UK.
Posts: 2,419
Default Re: Need an Isolation Transformer for CTX-S (Philips 14CT2006)

The TDA2577 data sheet shows that connecting pin 13 to 12v via a 12k resistor changes the time constant for use with a VCR. Therefore try connecting D8 to pin 13 via a 12k resistor.

If you are going to use it with a VCR I'd keep the audio input but delete all the circuit associated with the audio output ( IC2b, IC2c and IC2d and the associated components) I'll post a modified circuit later.

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