[vcf-midatlantic] Head align Tape

David Gesswein djg at pdp8online.com
Sat Jun 17 20:47:30 EDT 2017

On Sat, Jun 17, 2017 at 08:19:52PM -0400, Duane Craps via vcf-midatlantic wrote:
> >>>7 track or 9 track? The Univacs are pretty old even for "vintage".
> Head alignment tapes are not track specific. They have one track the
> width of the tape and are used to adjust time delays to time align
> the bits coming off the read head when reading the alignment tape.
> Then a "scratch tape" is used while writing all ones to adjust the
> write delays while looking at the read amps. We used the same
> alignment tape for 7 and 9 track units.
I have alignment/skew tapes also. Nore are labeled with BPI. I haven't
tried them yet. Depending on how many are still good I can loan or possibly
donate one.

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