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Specifications

* S p e c i f i c a t i o n s  are  s u b j e c t  to  change  without  notice

Accessories

Dust  cover

Single  pole  plug
Plug  for  connection  to  external  power  supply
Plug  for  connection  to  external  speaker

Fuse  (T500mA)

Operating instruction manual

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1
1

1

1
1

TOA Corporation

PRINTED  IN  JAPAN

133-07-082-40

Model

Power  Requirement

Rated  Output

AC

DC

Power
Consumption

Frequency  Response

Total  Harmonic  Distortion

Inputs

Wired  Mic

Auxiliary

Outputs

External

Speaker

Line  out

Signal  to  Noise  Ratio

Tuner  Section  (WTU-770)

Aerial  system

Receiving Sensitivity

Squelch Sensitivity

Receiving  System

Signal  to  Noise  Ratio

Cassette Section

Track  Format

Recording  System

Tape  Speed

Wow  &  Flutter

FF/REW  Time

Ambient  Temperature

Dimensions  ( W × H × D )

Weight

Finish

WA-641

WA-641C

220V/240V  AC  (Selectable),  50  Hz

Dry  Cells-8pcs.  (R20P  or  D  size),  External  DC  10  to  16V

15W  at  AC  (Max  20W),  6W  at  DC

44W  (Rated  output)

1300mA

70  to  10k  Hz  3dB  deviation

Less  than  3%  (at  rated  output)

Mic  1,  2 : — 5 4 d B v  600  ohms  (Swtichable  with  wireless  microphone)

-20dBV  500k  ohms

8  to  16  ohms,  more  than  20W  of  rated  input

0dBV  600  ohms

More  than  70dB  (at  rated  output)

Rod  aerial

More  than  80dB  (20dB

µ

V  input,  1kHz  Mod.  40kHz  Dev.)

More  than  75dB  (20dB

µ

V  input,  1kHz  Mod.  15kHz  Dev.)

14dBuV  (0dB = 1

µ

V )

Superheterodyne  System

More  than  95dB  (102dB: Aweight)  (60dB

µ

V  input,  40kHz  Dev.)

More  than  90dB  (102dB:  Aweight)  (60dB

µ

V  input,  15kHz  Dev.)

2  track-1  channel  (Mono)

AC  bias

4.8cm/sec.

0.3%  WRMS

Within  100  sec.  (C60  tape)

-10  to  40  °C  (14  to  104  °F)  at  AC

0  to  40  °C  (32 to  104  °F)  at  DC

366×456×200 mm  (14.4"  ×  18.0"  ×  7.9")

7.3  kg  (16.1  Ibs)

8.3  kg  (18.3  Ibs)

Light  green  (ABS  resin)

All manuals and user guides at all-guides.com

Summary of Contents for WA-641

Page 1: ...s Microphone Operating The Wired Microphone Using External Equipment Operating The External Speaker Using The Aux Input Using The Line Out Jack 1 1 2 4 5 6 7 7 8 8 Using The Cassette Deck Each Part Name And Function Playback Fast Forward And Rewind Recording Tape Travel Modes Cassette Tapes Maintenance Troubleshooting Specifications TOA Corporation 9 10 10 11 12 13 13 14 15 All manuals and user gu...

Page 2: ...g under the scorching summer sun or in locations where unit is exposed directly to the sunlight Also avoid in stalling unit close to heaters Take care that unit is not exposed to rain or that raindrops should not enter unit as it will cause electric shocks and breakdowns of unit Be sure to take hold of a plug to unplug the power cable from an AC outlet otherwise the cable is disconnected When unit...

Page 3: ...on indicator This lamp comes on when unit receives a signal from the wireless microphone Wired microphone volume control Mic 1 Mic 2 volume control This is a volume control for both the wireless and wired mic rophones Aerial Fully extend this aerial when using the wireless microphone Mic 1 wired mic jack 600 ohms 54dBV This jack can be used for both balanced and unbalanced type plugs Mic 2 wired m...

Page 4: ...matically switches over the power source to the dry cell power supply Note If unit is not in use for two weeks or longer take the dry cells out of unit to prevent breakdowns the dry cell leakage causes OPERATION ON EXTERNAL 12V DC OPER ATIONAL ON 10V to 16V DC A storage battery may be used by means of a plug for external power supply standard acces sory In making its connection observe correct pol...

Page 5: ...0 module inserted into the receptacle lengthwise 4 Attach the frequency marker supplied with the module to the corresponding volume control See Fig 2 Note Special cares are required so as not to insert the tuner module into the wrong receptacle nor attach the frequency marker to the wrong volume control Fig 2 Volume control on top panel 5 Fit the tuner cover in place after mounting the tuner modul...

Page 6: ...about disturbing radio waves When the meeting amplifier is installed very close to equipment that produce electric noise such as industrial use sewing machines and fluorescent lamps sound transmission from the wireless mic rophone can be interrupted In such a case put the wireless microphone closer to the amplifier or change the location of the amplifier 3 Take care about a null spot Signal dropou...

Page 7: ...the desired tone WA 641C Using External Equipment OPERATING THE EXTERNAL SPEAKER External speaker connector External speaker connection plug EXT SP EXT SP WA 641C External speaker 20W 8 16 ohms 7 1 Connect an attached external speaker connec tion plug to the speaker cable Note Use the speaker with rated power input of 20 watts or more and impedance of 8 to 16 ohms 2 Insert the plug into the extern...

Page 8: ... cassette deck Adjust the AUX input volume control for the desired volume Tone control can be performed with the bass treble control The input sensitivity is 500k and 20dBV For connec tion use a phone plug supplied The balanced type plug may also be used The LINE OUT jack connects to an extension ampli fier or cassette deck used for recording For con nection of these equipment use a phone plug sup...

Page 9: ...g this button Dust cover cassette holder Tape counter Counter reset button Press this button to reset the tape counter display to 000 Fast forward Rewind but tons Press this button to send the tape forward or in the re verse direction at top speed Stop button By pressing this button tape motion can be stopped Direction selector indicator This selector allows the tape to travel in the forward or re...

Page 10: ...ape travel direction Adjust the Tape control for desired playback level turning the control clockwise To stop playback press the Stop button 1 2 Press the preferred Fast forward button or or To stop the fast forward operation press the Stop button Tape motion stops Even when the tape is not travelling pressing the Fast forward button sends the tape running at top speed If the Fast forward button i...

Page 11: ... indicator Lights Direction indicator Only either or the two blinks If two tabs have both been removed Recording mode indicator Does not light Direction indicator Neither indicator blinks Recording is only possible in the direction indicated by the blinking direction indicator if only either of the two indicators is blink ing 5 Press the preferred Direction button and that pressed Direction indica...

Page 12: ...rsed at tape end Automatically reversed at tape end Tape run 12 2 To restart recording press the Direction in dicator button that is blinking The indicator changes indication from blinking to lighting allowing you to begin recording By repeating the above steps 1 and 2 different programme sources can be recorded one after another in the same tape travel direction When you wish to reverse the tape ...

Page 13: ...Adhesive tape DEMAGNATIZING THE HEAD The recording head becomes magnetized when you use the tape deck for prolonged periods of time This results in noise being generated and loss or recording which you want to keep The recording head should therefore be demagnetized regularly with the head eraser commercially sold in the mar ket CAUTION Do not grease any section as this causes breakdown of the dec...

Page 14: ...h in ON position Has wireless mic dry cell not been exhausted Change dry cell with new one No output sound Is wired mic not connected Remove wired mic No playback sound Is playback level control set to minimum Rotate control clockwise Recording button defies attempts to depress it Have erasure prevention tabs been removed Cover tab openings with adhesive tape Playback sound is distorted Recording ...

Page 15: ...imensions W H D Weight Finish WA 641 WA 641C 220V 240V AC Selectable 50 Hz Dry Cells 8pcs R20P or D size External DC 10 to 16V 15W at AC Max 20W 6W at DC 44W Rated output 1300mA 70 to 10k Hz 3dB deviation Less than 3 at rated output Mic 1 2 54dBv 600 ohms Swtichable with wireless microphone 20dBV 500k ohms 8 to 16 ohms more than 20W of rated input 0dBV 600 ohms More than 70dB at rated output Rod a...

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