away  from  the  head,  and  the  function  switch  is put  in  STOP  position. CAUTION:  The  record  lock  lever  (shown  in figure  7-19  as  the  instant  stop/record  key  lock) must   be   pulled   forward   before   the   RECORD key can be depressed. This releases the brakes, holds  the  tape  against  the  head  by  pressure  pads, and   pushes   the   pressure   roller   against   the capstan  and  advances  the  tape.  The  function switch  is  then  turned  to  the  RECORD  position. Depressing the play key causes the same action as the record key except that the function switch moves  into  the  PLAY  position. HIGH-SPEED   LEVER.—Locate   the   high- speed lever in figure 7-19. You will find it to the left of the function keys. Moving the high-speed lever to the right causes the tape to advance at a much higher speed than during normal record or playback operation. When the lever is moved to the  left,  tape  is  rewound  onto  the  supply  reel. The  high-speed  lever  can  be  moved  when  the recorder  is  in  any  function  (PLAY,  RECORD, or  STOP)  and  the  play  or  record  key  will  be automatically   released.   When   the   lever   is returned  to  neutral,  the  recorder  is  left  in  the STOP   position. INSTANT   STOP   AND   RECORD   LOCK LEVER.—This  lock  lever  is  a  safety  feature  to prevent accidental erasure of prerecorded tapes. It   must   be   pulled   toward   the   front   of   the recorder  and  held  there  before  the  record  key can be operated. It also serves as an instant stop lever when the tape is in motion during record or playback.  When  the  instant  stop  lever  is  pulled toward  the  front  of  the  recorder,  the  tape  drive is  disengaged  and  the  tape  stops  instantly.  The recorder  returns  to  its  previous  operation  when the lever is released. RECORD-LEVEL    INDICATOR.—During recording  operations,  the  left  or  “Normal”  half of   the   indicator   flashes   to   indicate   a   correct volume  level  and  the  right  or  “Distorted”  half flashes  if  the  volume  setting  is  too  high.  If  the volume  level  is  preset  for  recording  before  the record key is pressed, the tone control should be turned  to  TREBLE.  However,  after  the  record key  has  been  pressed,  the  tone  control  adjust- ment  has  no  effect.  When  playing  prerecorded tapes,  ignore  the  flashing  of  this  indicator. SPEED  SELECTOR.—The  speed  selector  is mounted near the index counter at the left front of  the  instrument,  and  determines  whether  the tape  travels  at  7-1/2  or  3-3/4  inches  per  second (ips)  (19  or  9.5  ems).  The  speed  being  used appears on the speed selector dial. The recorder does  not  need  to  be  stopped  in  order  to  change speeds.   Rapid   forward   winding   can   be accelerated  by  setting  the  speed  selector  to 7-1/2  ips  (19  ems). INDEX   COUNTER.—The   index   counter can  be  set  to  zero  by  turning  the  knurled  knob toward the rear of the recorder. If the counter is zeroed  when  recording  or  playback  starts,  tape selections  can  be  indexed,  thus  providing  quick and accurate replay or editing. HEAD  TRACK  SELECTOR.—Figure  7-19 shows the location of a head track selector. This is peculiar to models with a quarter-track stereo head.  The  quarter-track  stereo  head  on  this model tape recorder may be used to make either 2-  or  4-track  monaural  recordings.  This  instru- ment will play back 2- or 4-track monaural and 2-or  4-track  stereo  tapes.  To  function  properly, however,  the  head  pole  pieces  must  contact  the tape at the proper level. The head track selector moves  the  head  to  the  correct  position  when properly set and when the proper side of the tape reel is up. There  is  a  rear  panel  which  contains  some important  controls.  These  are  shown  in  figure 7-20  which  is  a  drawing  of  the  rear  panel  con- trols. RECORD   MIKE/PUBLIC   ADDRESS (PA)-MONITOR   SWITCH.–When   this   slide switch  is  in  the  RECORD  MIKE  position,  the speaker does not operate when either the record or stop key is depressed. This is also true of any speaker which may be connected to the speaker output  jack  at  the  time.  When  the  switch  is  in PA-MONITOR   position,   the   speaker   is   con- nected so that the recorder can be used as a PA system  or  so  that  program  material  can  be monitored as it is being recorded. The switch has 7-38