rewindand all the way from the head for fast forward.
Movement of this control will wind the tape on the de-
sired reel at a high speed as long as the control is in
this position, This control is primarily used in 1o-
catingadesiredportionof arecordingin a few seconds.
To Play A Recory!!4g-
l. Thread tape as described under rtThreading
the Tape".
2. Turn control knob (6) to I'Forward'! and ampli-
fier to playback.
3, Adjust tlte t'Volumet'and t'Tonetr controls for
desired listening level.
To Edi.t And Splice Tape-
NOTE: Since it is impossible to edit and splice one
track without affecting the other, recordings
which are to be edited should be limited to
one trdck only.
l. Thetapemaybeeditedby cutting out unwanted
portions, or by joining selections into another sequence.
Announcements may be inserted between selections,
etc. Unused sections of tape can be spliced together
for re-use.
2. Forbestresults, cuttape at a slight diagonal,
join ends together with splicing tape on the glossy side
and trim off any excessive width.
Erasing Recorded Material-
Units having erase head the tape is erased auto-
matically when unit is in the record position, ff it is
desired to erase a recording without putting anything
on the tape follow the normal recording procedure,
but leave tJre "Volume" control set at its extreme
counterclockwise position.
ADJUSTMENTS
Removal Of Main Escutcheon-
To remove front panel, remove "tape feed com-
pensator", tapelifter (if used), the four panel retain-
ing screws at top and bottom edges and remove knob
from tape motion control (6). With motor turned off,
place tape motion control in forward position and lift
off panel (24).
Takeup Drive Belt-
If the takeup reel (20) does not drive properly,
loosen the idler bracket mounting screw (46) slightly
andmovebracketto right, increasing belt (13) tension.
NOTE: Tootighta belt will cause undesirable tension
on tape during play. Do not move arm so far
to right as to cause the lower corner to dig
intothe takeup reel hub when the Tape Motion
Control is placed in the rewind position.
Supply Reel Brake-
Place Tape Motion Control (6) in "Rewind" po-
sition, loosen brake bracket mounting screws (4?)
Blightly and so adjust bracket that pad (28) is just
clear of supply reel hub (2?). Tighten screw. With
this adjustment properly made the brake spring will
Page 4
be forced away lrom the bracket approximately L/ 64
inchwhenthe Tape Motion Control is in "Stop" position.
Rewind Drive Adjustment-
Set rewind drive adjustment nut (25) so that
spring (26) does not bear on bearing bracket when
Tape Motion Control is in "Stop" position. (This
adjustment must not be changed after setting supply
reel brake adjustment. )
Takeup Reel Brake-
No adjustment is provided or necessary. Fail-
ure could oceur only because of excessive wear or
damage to pad (18).
IIead Adjustments-
Head height is determined by fixed spacers.
(A thinner spacer is provided for erase head (21) be-
cause of added track width. ) Each head is factory
adjusted using a very high frequency alignment tape
and special indicators. Do not attempt azimuth ad-
justment unnecessarily.
To adjust head face parallel to tape, loosen
retaining nut slightly and, using constant frequency
tape, turn head (22) to obtain position providing maxi-
mum volume oscilloscope, or meter indication.
(Adjust azimuth before completely re-tightening nut. )
To adjust azimuth use a suitable allen wrench
andadjust.thetwo set-screws alternately for maximum
indication. A high frequency tape (at ieast 7500 cps)
is necessary for precise adjustment. Tighten retain-
ing nut and check to see that no reduction in output
results. Use of an oscilloscope or output meter is
essential. The procedure for adjustment of binaural
heads is indentical. An erase head requires no azimuth
adjustment. Merely position the head so face is paralLel
to tape.
Adjustment Of Tapelifter And Pressure Pad
Assemblies-
NOTE: Pressure pad assemblies can be used only on
binaurai or erase record head assemblies
(two heads). Thetapetifter mechanism, how-
ever, is adaptable to single head unit.
Adjust cam (53) on shift rod (14) so that it is
barelyin contact with lifter when Tape Motion Control
is in forward position. See that lifter assembly (in-
stalled after front panel is in place) is bottomed on
mounting screw. Bend tapelifter support slightly if
necessary to bring tapelifter fingers parallel to face
of head and approximately l,/16 inch above top of head
bracket (20) when Tape Motion Control (6) is in rtstop'
position, When installing or readjusting a pressure
pad assembly (5?) it may be necessary to bend the
pad holder spring (59). With the tape motion control
in the I'Forward" position, the pad rest squarely and
very lightly on the face of the heads and on the tape
path. No appreciable flexing of the springs should be
noticeableasthepressure pads are raised to the lifted
position. The mounting screw is accessible after the
panel is in place only if the tape motion control is in
the "StopI or t'Rewind" position,
Adjustment Of Tape Feed Compensator-
The purpose of the "tape feed compensatorl is
to absorb and average out the slight variations in tape
