From: Patent Tactics, George Brock-Nannestad
obviously you are right, ½ inch master!s Lyrec also made equipment for 1"
masters. The old Lyrec website has been frozen as a time capsule and is
> On 1/13/2011 8:51 PM, George Brock-Nannestad wrote:
> > From: Patent Tactics, George Brock-Nannestad
> > Hello Michael [Shoshani],
> > you never understood high speed commercial dubbing. Well, it was a high
> > reproduction of the master 1/4 inch tape and dubbing it onto high speed
> > recording cassette tape,
> The duplicators I saw here in the U.S. often used a 1/2 inch master
> because it was four track -- both sets of stereo tracks were recorded at
> the same time. The master was in a bin-loop which played over and over
> and over and over.
> > collecting the recorded cassette tape in a cassette,
> > putting in an empty cassette and recycling the master. The cassette tape
> > from a pancake and was cut.
> They usually recorded the entire pancake from the continually repeating
> bin-loop master. The recorded pancake was placed on the cassette
> loading machine, and a cue tone told the machine where to cut. The fun
> part is watching the automatic splicing block splice the tape onto the
> middle of the C-0's leader. Then the tape is wound into the cassette
> until the tone stops it, and then the automatic splicer tacks the other
> half of the leader onto the tape and is wound back into the cassette and
> it drops down a chute to the pile of cassettes. I videotaped one of
> these machines and ought to put it on YouTube -- but I bet there already
> is one.
> > It was very quick, but there was no loss of high
> > frequencies, because that is all dependent on the gap length, and that
> > the same. It was a fully automated process, and LYREC of Denmark made
> > good duplicating equipment. The electronic difficulty was in the bias
> > frequency, which was in the Megahertz range, and you had to be very
> > with your stray capacities.
> The interconnect cables were video cables because the frequencies were
> up in the video range.
> > Mechanically it was a challenge, but LYREC did
> > solve that. LYREC machines are still in operation, I think, and their
> > markets were in India and Russia. Kind regards, George
> I think there still might be some going here in the U.S.
> Mike Biel [log in to unmask]
> > ---------------------------------------
> >> On Thu, 2011-01-13 at 19:21 -0500, Tom Fine wrote:
> >>> But, none of this warm and fuzzy nostalgia will make those piece of
> >> garbage pre-duped tapes sold to
> >>> the Walkman Generation sound any better. They were disposable junk,
> >> almost all of them ended up
> >>> in landfills in the 90's, replaced by much better sounding CD's. I
> >> fell for the trap since I
> >>> could dub my own tapes.
> >> Same here. I never understood how high speed commercial dubbing worked
> >> in the first place; it seems that all the high frequencies would be
> >> out of the reproduction and recording range of the equipment involved.
> >> I made my own LP to cassette dubs, carefully setting the recording
> >> to kick just below -0 db on the loudest passages so as not to ride gain
> >> constantly.
> >> My children will never know such geeky joys. :)
> >> Michael Shoshani
> >> Chicago