CT1024, was VCF 3.0 ANNOUNCEMENT:

<>Common mod, mine has it too. < <Mine wasn't the most neat, ic's soldered on top of others, etc. Did it the same way, though I was somewhat careful in assemble so it was rugged. <I built the Bit Boffer from the March 1976 Byte. It was my second cassette <interface. The first was just a keyed tone, at about 110 baud. The third That was it. Never bilt one. I did KC standard using cpu cycles instead. <Were these the timing components for the 555 running at 15,840kHz? Pot. = <R38 and timing cap C16= 1nF? Were they out of tolerance for this frequency <or something else? My display was stable without 60Hz "sync" input and <moved around at about 1Hz with the input. Pot and cpu for the H osc, thouse could like it. The cap was garbage. Still have mine and it still works. Allison