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Fantastic find! Thank you for posting this.
Sounds like a ~450 Hz tone, from a Tektronix TSG-170A generator. Wonder what 7 x 9 character font was used on that system.
Fantastic find! Thank you for posting this.
Sounds like a ~450 Hz tone, from a Tektronix TSG-170A generator. Wonder what 7 x 9 character font was used on that system.