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Radio1950 · 12th Oct 2021, 11:49 pm

The +5V DC supply is completely isolated from the clock source.
The trial emitter follower was mostly to do with clamping the clock LOW state more towards 0V.

12th Oct 2021, 11:49 pm	#18
Radio1950 Hexode Join Date: Apr 2017 Location: Buderim, Queensland, Australia. Posts: 428	Re: Interesting Vintage TTL Logic IC Problem The +5V DC supply is completely isolated from the clock source. The trial emitter follower was mostly to do with clamping the clock LOW state more towards 0V.