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switch  on  the  power  some  moments  before  you  play  records  for 
reproduction.  In  radio  reception,  however,  the  sound  can  be  heard  in 
about 

20 

seconds. 

2. 

Speaker  Phasing 

When the  left  and  right  speakers  are  attached  to  the  opposite 

( +) 

and  (-) 

terminals,  the  sound  level  midway  between  the  two  speakers  will  fall, 
a  deterioration  in  bass  being  especially  noticeable.  Listen  to  the  stereo 

recording  and  switch  the  SPEAKER  PHASE. 

It  is  in  proper  phasing 

if  the  sound  midway  between  the  two  speakers  becomes  full  and  the 
bass  tone  improves. 

3. 

HUM  BALANCER 

Adjust  in  the  following  manner:  Connect  all  the  lines  from  the  pickup 
and  to  the  speakers;  switch  on  the  power  and  turn  the  volume  control 
up  almost  to  maximum.  Turn  the  HUM  BALANCER  with  a  screwdriver 

or  coin  until  hum- an  irritating  drone- is  reduced  to  minimum. 

It 

will  suffice  to  adjust  it  only  once- you  need  not  adjust  it  again. 
The  hum  sometimes  decreases  depending  on  the  way  the  amplifier  power 
cord  is  plugged  into  the  socket.  Choose  the  position  with  the  least  hum. 

4. 

HOWLING 

When  the  record  player  is  placed  directly  on  top  of  the  speaker  case 
or  close  by  it,  the  sound  from  the  speaker  travels  to  the  player  pickup 
needle  and  causes  "howling".  It  then  becomes  impossible  to  raise  either 
the  volume  or  boost  the  bass  tones.  Adjusting  the  amplifier  will  not 

help  since  it  is  not  responsible  for  the  howling. 
In  order  to  avoid  howling,  keep  the  player  case  and  speakers  as  far  apart 

as  possible.  However,  if  you  are  forced  to  place  the  player  on  top  of 
the  speaker  lay  a  thick  cushion  or  sponge  mat  in  between. 

5. 

HEATING  OF  AMPLIFIER 

The  upper surface  of  the  amplifier  case  reaches  a  considerable  temperature 
with  the  elapse  of  time;  but  since  the  W-38  is  well  designed  with  this 
taken  into  account,  you  need  not  worry  about  it.  However,  do  not  place 
anything  on  top  of  the  case  thereby  blocking  the  ventilation  holes  and 

increasing  the  heat  inside. 

6. 

SPEAKER  SWITCH 

Turn  the  SPEAKER  (See  photograph)  to  OFF  position 

only 

when  you 

use  the  headphone.  Keep  it  at  ON  position  at  all  other  times. 

Caution: 

Donot  raise  volume  when  the  switch  is  in  OFF  Position  with 

a  stereo  headphone  disconnected. 

Otherwise,  it  is  likely  to  cause  a 

breakdown  in  your  amplifier. 

10 

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Содержание W-38

Страница 1: ...INSTALLATION AND OPERATING MANUAL DELUXE STEREOPHONIC AMPLIFIER AM AM FM SW Tuner Combination MODEL W 38 DISTRIBUTOR www hifiengine com ...

Страница 2: ...joy on the spot listening by adjusting the Loudness Control 5 Rumble Filter Irritating low level motor rumbling disturbances can be filtered out with the Rumble Filter 6 RP Cord Tape Recorder Terminal The W 38 is equipped with a special socket of the kind agreed to among the major tape recorder manufacturers a RP cord terminal by which recording and reproduction are possible using only one connect...

Страница 3: ... speaker midway between the two making the connections as shown in Diagram 2 By supplementing the volume in this way you can enjoy a very natural sterephonic reproduction RIGHT SPEAKER IMP SELECT LEFT SPEAKER RIGHT SP PHASE POSITION OF SPEAKER PHASE CENTER DIAGRAM 2 so won VOL CONT LEFT LEFT SPEAKER 3rd SPEAKER DIAGRAM 3 RIGHT SPEAKER If you decide to use three speakers first adjust the phasing of...

Страница 4: ...MINAL DIAGRAM 4 DIAGRAM 5 IMPORTANT Do not place the antenna line near fluorescent lighting which causes disturbance in the form of a buzz Antenna for Listening to a FM Broadcast Connect the FM antenna to G and FM as shown in Diagram 1 Turn the horizontal part of the T shaped ant nna towards the direction in which you can receive optimum reception and then pin both ends to either the ceiling or wa...

Страница 5: ...h a RP cord you can reproduce stereo recording merely by plugging the cord into the socket provided for this purpose Recording with a tape recorder Connect the lead lines from the LINE IMPUT terminals of the tape recorder to the terminals marked TAPE REC In the case of monaural recording either one top or bottom of the terminals may be used Playback of tape recorder Connect the lead line from the ...

Страница 6: ...lockwise to boost 6 TREBLE CONTROL The treble tones of both the left and right speakers can be adjusted simultaneously Turn clockwise to boost 7 BALANCE CONTROL This knob is for the purpose of balancing the left and right speakers Turn counter clockwise to boost the volume of the left speaker and clockwise that of the right speaker 8 FM STABILIZER FM AFC OFF Select FM station with switch at this p...

Страница 7: ...ereo and shortwave broadcasts 14 LEFT CHANNEL MAGIC EYE When you select the station with the TUNING 1 knob see that the magic eye expands to its maximum 15 RIGHT CHANNEL MAGIC EYE When you select the station with the TUNING 2 knob see that the magic eye expands to its maximum 16 SOCKET FOR TAPE RECORDER WITH RP CORD 17 RIGHT SPEAKER TERMINAL DIAGRAM 8 18 IMPEDANCE SWITCH Switch to correspond with ...

Страница 8: ...ectricity is on 2 VOLUME CONTROL 3 LOUDNESS CONTROL 4 RUMBLE FILTER 5 BASS CONTROL 6 TREBLE CONTROL 7 BALANCE CONTROL 9 SPEAKER SWITCH 2 RECORD PLAYBACK WITH STEREO PICKUP 10 PHONO 11 STEREO or REV 3 PLAYBACK OF TAPE RECORDER 10 AUX 11 STEREO OR REV Stereo reproduction LEFT When the left input terminal is used for monaural listening 4 RECORDING WITH A TAPE RECORDER The exact sounds coming out the ...

Страница 9: ...M2 11 STEREO or REV 12 FM Station Selection 13 AM Station Selection 8 Select FM station at OFF position and listen at ON 11 STEREO HEADPHONE USE 21 Plug in headphone jack 9 OFF To eliminate speaker sound ON To bring out the speaker sound DIAGRAM 9 V POINTERS 1 It takes approximately 50 seconds for the sound to emerge from the recorder after switching on the power A direct current flows into the fi...

Страница 10: ...t hum 4 HOWLING When the record player is placed directly on top of the speaker case or close by it the sound from the speaker travels to the player pickup needle and causes howling It then becomes impossible to raise either the volume or boost the bass tones Adjusting the amplifier will not help since it is not responsible for the howling In order to avoid howling keep the player case and speaker...

Страница 11: ...0dB 94Mc AM 46dB 1Mc Mag 3mV X tal 36mV input required for S N 20dB quieting AUX 225mV input required for 9 watt output SOc s f 10 5dB lOKc 8dB 1 8dB 8 5dB 50c s 8dB 20c s 15dB 50c s 15dB 10Kc 4dB Volume control at 30dB 14 watts per channel undistorted output 10 watts or 28 watts in total Harmonic Distortion less than 2 Within 20c s 50Kc 0 5dB output at 500mW RIAA MAG 30mV AUX 4mV volume maximum t...

Страница 12: ...www hifiengine com ...

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