deeb wrote: > >> > We had a 2 meg (!) drum drive for use as a aid to doing CTD casts ( > Conductivity, Temp and Depth.) > > It was a sealed unit driven by a 1850 rpm A/c motor.and it had a Rhodium > plated drum > It was mounted on the second deck in a dry airconditioned lab space. > > Unfortunately the motor acted a a sort of gyroscope and wiped the > read/write heads out in a short period of time. > > The drive cost about $8 K (1972) and was deemed SOTA. > > Repair estimate was 3-4 K so we never got any use from it !
Hi dee- Do you remember how many tracks? Or anything about the head mechanisms? Oh .. sealed, eh? No inspection windows? For the benefit of innocent bystanders, a drum would have as many heads as there were tracks, so there was no "seeking", no seek latency. Izzat right? Sorta like a edison wax recordings with multiple pickups. Ohh, nobody remembers those either? (Well, actually, neither do I, but I remember pictures of them.) Can you explain the "gyroscope-effect" damage. I don't follow. ..jim -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
