In a previous post, I described how I discovered that the SCELBI cassette write card didn’t work with a standard 7493 in position Z4 without changing the value of the capacitor located between Z13 and Z14. I went ahead and ordered some 7493A parts, which arrived yesterday. Last night, I installed one in position Z4 of the cassette write card. As expected, with the “A” version part, the SCELBI cassette write card works with the standard .02uF capacitor.

Also, I have posted a new version of the Cassette BOM V2.1.