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Re: [ARSCLIST] Re print-thru - tails out

Aron Levinson:

> Actually my experience has been that you should never 
> run and store the tape in any shuttle mode as the tape 
> is wound much tighter and this increases print through. 

This is not correct as it depends on if the tape machine is constant
tension or constant torque.

The Studer A812/A820 are constant tension in ALL modes and the actual
tension in all modes can be adjusted to any desired value by adjustments
to the software controlling the machines in real time.

You are correct if we are speaking about constant torque machines such
as the Ampex AG440 series.

> The suggestion for storage has been 
> tails out played in real time. 

Makes no difference when using good correctly slit tape and a constant
tension tape machine.

If the tape has country laning due to bad slitting, American tapes
Ampex/Scotch, then the actual tape pack is much worse than using German
tape, AGFA/BASF, which do not exhibit country laning using precision
slitting machines because of the use of AEG hubs by the Germans on their
tape recorders with no top flange and thus using American tapes means
instant disaster on such equipped tape machines.

> The real time speed does not 
> pack the wind as tightly.

Only holds for contant torque machines.

But even then the actual torque IS adjustable using pre set power
resistors setting the actual current through the winding motors and this
can be adjusted any way you want it.

So it should be possible to have higher torque during real time speed
than fast winding for example.

Problem here is that constant torque machines have the highest tension
at the innermost part of the NAB hub while having least tension at the
outside diameter.

This is not good as to get sufficient packing tension at the outermost
diameter then it becomes dangerously high at the innermost diameter.


Goran Finnberg
The Mastering Room AB

E-mail: mastering@xxxxxxxxx

Learn from the mistakes of others, you can never live long enough to
make them all yourself.    -   John Luther

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