LGP-30 Memory Drum Update

[Chuck Guzis]

On 01/03/2017 01:42 PM, Mark Linimon wrote:

> Very ambitious.  IIRC for the G-15 there is/are (one? two?) timing
> track(s) which were written at the factory.  Of course whatever that
> machine was, has not survived.  I remember reading that if you lost
> that timing track, your machine was toast.


Maybe.  ISTR that wehn CE's were working on the CDC STAR station drums,
they routinely rewrote timing tracks.  I recall that their only tools
were a scope and a Halliburton CE box.  Apparently, the goal was write a
track such that there was no detectable "splice" in the beginning/end of
the track.  Pretty much a cut-and-try operation.

Perhaps the LGP30 is similar.

--Chuck