Akai GX-77 Operator's Manual page 5

Tapes
Tape Care
e@ Fingering the magnetic surface of the tape
causes signal dropout. Particular care should be
taken with open reel tapes.
e@ Recordings cannot be made on the leader tape
at the beginning and end of the tape. Forward
the tape until! there is no feader tape in the head
path before recording.
@ Please do not leave tapes loaded on the deck
over long periods of time. Remove after use,
replace in their boxes and store in a cool, dry
place away from units producing magnetic
fields such as speakers or TVs.
e@ Long-period storage of tapes that was taken up
in a fast forward or rewind mode will cause
damage to the tape, leading to unexpected
troubles or will make them unfit for use. There-
fore, the tapes should be stored in a condition
as taken up in an orderly manner with the tape
traveling at the fixed speed of recording or
playback. However, either rewind or fast forward
the entire tape before using the tape after
storage.
Do not bend or force the tapes. Faulty reels
Can cause unstable tape travel so avoid loose or
warped reels.
Tape Recording Time
Marketed tapes are available in lengths of 740m (2,400ft), 550m (1,800
ft) and 370m (1,200ft) etc. The TAPE SPEED selector on this deck can
be set to either 19 cm/sec. (7-1/2 in.) or to 9.5 cm/sec. (3-3/4 in.).
Please refer to the chart following for the length of recording and play-
ing time at each speed.
* A fast speed gives good wow and flutter and frequency characteris-
tics but it also shortens playing time.
Tape Length 740m 550m 370m
Tape Speed 2400ft) (1800ft) (1200ft )
ee p (
One-way 60 45 30
19em/sec (7)4in)
Two-way 120 90 60
One-way 90 60
9.5em/sec (3% in)
Setting The Tape Selector
Please refer to the chart for the correct TAPE SELECTOR settings for
marketed tapes.
k
eee NORMAL
AKAI LN, WR
ec eae oc
The standard reference tape is the 150% (550m) in beled type. Each
tape position has been adjusted for the reference tape.
* Please set the BIAS Adjustment (ADJUST) Control to '0' when
recording with tapes designated as standard reference tapes.
4 as
Extra Efficiency (EE) Tapes 3
The TAPE SELECTOR has a position (EE) for the high
performance Extra Efficiency tapes. When recording
with EE tapes, set the TAPE SELECTORto EE and set
the BIAS ADJUST control to "0",
A
EXTRA EFFICIENCY
GX Head
When compared with other heads the GX heads in this deck are highly
efficient with their decreased magnetic change loss ad subsequent
corresponding decrease in the amount of compensation to the equalizer
circuit. This decrease in compensation can thus be attively used to
improve the tape's magnetic characteristics. tn particularthhe compensa-
tion for high frequency characteristics improves the high frequency
high level recording. Moreover although the noise inhermt in the tape
and the built-in amplifier is increased by the equalizr circuit, the
amount of decreased compensation decreases the noise tontributing to
an improved signal to noise ratio.