6 Sep
2005
6 Sep
'05
6:19 a.m.
>>>> "Scott" == Scott Stevens
<chenmel at earthlink.net> writes:
Scott> On Fri, 02 Sep 2005 00:41:10 -0700 Brent Hilpert
Scott> <hilpert at cs.ubc.ca> wrote:
> Vintage Computer Festival wrote:
> >
> > On Tue, 30 Aug 2005, Brent Hilpert wrote:
> >
> > > The sad part is that at least two of the control panels look
> like > > they may have just been stripped from complete units.
> >
> > There's nothing terribly special about the 3420 drives. I mean,
> who > (beside my insane self) is going to want one? And if so,
> for what, > other than gawking at it?
>
> Yeah, well, they're just neat, that's all. Side-by-side-reel
> vacuum-column tape drives: #2 on the list of iconic aspects of
> early computers, although I take #it from it's appearance and what
> you and William are saying that these (3420s) are late models(last
> of the breed?).
>
Scott> Where I worked, in the late 70's, it was the NEWER drives that
Scott> had vacuum columns. The old drives were the ones I had to
Scott> deal with the most. It was a COM facility so the only thing
Scott> we ever did was read tapes, but they came from all over the
Scott> place (different customers). Also, it was only the NEWEST
Scott> drive that had 6250 bpi. Mostly we dealt with 800 and 1600
Scott> tapes, and with drives that had switchable 7/9 track heads. I
Scott> wouldn't call vacuum column drives an icon of EARLY
Scott> computers...
Curious. The old IBM 360/44 I used, and the Cyber 73 with old slow 7
track tape drives, both had vacuum columns. The first couple of
magtape drives for PDP11s from DEC all had vacuum columns. It wasn't
until the TS03 and TS11 ("tape stretch 11") that DEC tried to do it on
the cheap without vacuum columns.
paul