[78-L] question on tape baking

[Robert M. Bratcher Jr.]

On 9/17/2009 10:29:59 PM, David Lennick (dlennick at sympatico.ca) wrote:
 > Michael Biel wrote:
 > > -------- Original Message --------
 > >  Subject: Re: [78-L] question on tape baking
 > >  From: "Robert M. Bratcher Jr." <bratcher at pdq.net>
 > >  Date: Thu, September 17, 2009 1:27 pm
 > >  To: 78-L Mail List <78-l at klickitat.78online.com>
 > >
 > > dl wrote:
 > >>> It may be the same as Ampex 291, which was sold
 > >>> as for educational use.
 > >
 > >> I don't think I've ever seen Ampex 291. Was that another
 > >> reject tape sold cheaply?
 > >
 > > I seem to recall it was in orange and brown boxes.  I think I have some
 > > of it from our school library.  Educational sales were usually bulk
 > > sales.
 >
 > Blue on blue, I thought, but they could have changed the design from time
 > to
 > time. Some broadcasters and syndicators used 291 for programs they shipped
 > out.
 > Maybe it was good for high speed duplicating.
 >
 > dl

So I'd guess that Ampex 291 was a voice grade tape right? How does it 
compare in sound quality to Ampex 641 which was also a voice grade 
tape? Of & I saw a picture of an Ampex 291 box. It's blue on blue in 
color. 1.5 mil & 1200 feet in length.