Kodak EKTAGRAPHIC 470 - Manual (Page 18)

Hz slide-advance pulses and 150 Hz
program-pause signals. Like most cas­
sette machines designed for audiovi­
sual use, the tape is intended for
recording and playing in one direc­
tion only and must be rewound before
being replayed.
If the cassette is accidentally
turned over and played in the wrong
direction, you will hear the 1000 Hz
slide-advance pulses (the "beeps”) re­
produced over the loudspeaker—not
the soundtrack.
(Models 220 and 270)
TAPE TRACKS
SIGNALS AUDIO
4 3 2 1
Playing Continuously Repeating
Sound-Slide Programs
A silent or recorded endless-loop cas­
sette having properly spaced slide-
advance pulses can be used as a tim­
ing device to advance a sound-slide
program designed to repeat continu­
ously. Record slide-advance pulses (at
least 1 1/2 seconds apart) on the end­
less-loop cassette at the intervals de­
sired. Short endless-loop cassettes are
preferred. Be sure to use only the type
that have sprocket teeth on the hub of
the take-up reel. Clean the metal heads
and tape-guide path in the built-in
cassette machine often because these
tapes are heavily lubricated.
Model 570AF: We suggest using
the built-in variable-electronic timer
as the timing device to advance the
continuously repeating program in­
stead of an endless-loop cassette.
©
Mi
1
An endless-loop cassette.
Some Sources of Endless-Loop
Compact Cassettes Designed
to be Played in the Vertical
Plane
Compact-cassette format continuous-
loop tapes are usually designed to be
played in the horizontal plane, label
up. However, owners and users of the
EKTAGRAPHIC AudioViewer/
Projector interested in producing
and presenting continuously repeat­
ing sound-slide programs may want
to purchase continuous-loop cas­
settes designed to be played vertical­
ly. Two firms marketing such cas­
settes are:
• Visual Horizons, Inc.
180 Metro Park
Rochester, NY 14623
• Mann Endless Cassette Industries
P.O. Box 1347
3700 Sacramento St.
San Francisco, CA 94101
These companies are mentioned
for the convenience of our custom­
ers. This does not constitute a recom­
mendation or endorsement by
Eastman Kodak Company.
Stereo Music Tapes
Cassette tapes that have audio record­
ed on all four tracks (such as those
sold for playback on home cassette
players) will trigger sporadic and un­
wanted slide advances (and program
pauses, with Models 470 and 570AF).
Tapes having no audio recorded
on tracks 3 and 4 (such as those
recorded with an EKTAGRAPHIC
AudioViewer/Projector or with most
audiovisual cassette recorders) can be
played satisfactorily.
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