Re: PYE TT1 - First Transistor Portable UK TV
Everything was just about ready to reinstall the chassis into the cabinet, then disaster! Two OC171 transistors in the vision IF strip have gone down with the dreaded whisker problem. Fortunately I found an AF114 which is a near equivalent to replace one that would not respond to cutting off the screening can lead. As for the other OC171 I just got with simply disconnecting the metal can lead.
Now 25volts P - P video is present at the CRT grid connector.
DFWB.
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