[Milsurplus] RE: Transcription Disks

Wed, 1 May 2002 08:27:39 -0700

This also reminds me of  a great accounting of an early attempt by RCA to
make a video recorder.... the heads did not scan... they just cranked the
tape at an enormous rate past fixed heads.  to assist the stopping of the
tape the operator would have thick groves on his hands......

this was from the book fast forward chronicling the development of the video
tape industry...

ed sharpe archivist  for smecc
----- Original Message -----
From: "mikea" <[email protected]>
To: "ed sharpe" <[email protected]>
Cc: "Don Hendrickson" <[email protected]>; <[email protected]>
Sent: Tuesday, April 30, 2002 6:10 AM
Subject: Re: [Milsurplus] RE: Transcription Disks

> On Mon, Apr 29, 2002 at 09:14:12PM -0700, ed sharpe wrote:
> > Greetings!
> >
> > yes, 16 was a slow speed for transcription usage. if you really wanted
some
> > fidelity though you used  faster speeds.  the 16 would cover a longer
period
> > of time...
> > sort of like the 3 speeds on a reel to reel tape  unit... fast sounds
better
> > slow covers more time..
>
> Three, yes -- or more, or fewer.
>
> One Ampex instrumentation tape drive I used to maintain and use
> had speeds from 15/16 ips through 120 ips. Of course, it also
> filled an 84" high rack, weighed 450 pounds, and used 9200-foot
> reels of 2" tape, and had a top end of about 1.5 MHz at 120 ips.
> The tape path used air bearings throughout, and it was made like
> a (rather large, heavy, but beautifully precise) Swiss watch.
>
> And it was reel to reel. ;=)
>
> --
> Mike Andrews
> [email protected]
> Tired old sysadmin since 1964
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