Nakamichi 1000 User manual

NAKA-00024
Nakamichi
TOOO
Operating Instructions
Printed by: Schaltungsdienst Lange, Berlin (GERMANY)

We thank you very much for your purchase
of the Nakamichi 1000.
This recorder is designed especially for the
professional use and is adaptable for the
standard 19” rack.
The transport mechanism, heads and
circuitry of the Nakamichi 1000 are the
outcome of the highest state of art
developed by Nakamichi Research Inc.
and its performance is comparable to the
professional quality 3-head reel-to-reel
recorders.
Before using this recorder please read this
instruction manual very carefully so that all
functions and features will fully be used
with the highest performance.
CONTENTS:
Control Functions.............. 1
Connections. ............00005 3
Playback Procedures ............ 4
Before Recording.............. 5
Level Calibration .............. 6
Recommended Cassette Tapes and
Tape Selector Switch ............. i
Record Procedures ............. 8
Additional Recording and
Playback Techniques............ 9
Peak Level dB Meter............ 10
Cassette Lid Removal! and
Lubrication ................... 10
Double Noise Reduction System... .11
Trouble Shooting Chart.......... 12
Specifications ................ 13
Optional Accessories............ 13

Control Functions
SILAS LETRAS ALLER AIT SARE TET SAE IE NEI STUN IE
|
1
|
|
H {
\ { {
{ H
| H
1
;
8 AERA YRE TG SSI I
| 4
|
@ Tape Run Indicator:
During recording/playback, a green lamp
moves from right to left hand side showing
the actual tape run.
@ Adjustment Lid:
When you opened this lid, you will find
functions such as the recording head azimuth
adjust, test tone, and pitch control.
© Cassette Lid:
The Lid will be opened when the EJECT
button is pushed.
© Eject Button
@ Tape Counter
© Pause Button:
Used to momentarily stop the tape in
recording or playback mode.
When depressed during recording, the
recording circuits remain operative, and the
capstan remains in motion but the pinch
roller is retracted,
@ Record Button:
Recording will be commenced when pushed
simultaneously with the Play Button.
© Fast Forward Button:
Serves tape to move rapidly from right to
left reel. When the tape reaches the end,
depress the Stop Button or allow auto-stop
to function.
© Rewind Button:
Serves tape to move rapidly from left to
right reel.
Depress the Stop Button or allow auto-stop
to function.
@ Stop Button:
When pushed, the entire motions will stop.
@ Play Button:
Tape runs at the standard speed, and when
you touch the Button, playback of the
pre-recorded tapes will commence.
@ Auto Rewind Switch:
If you set the Auto Rewind Switch to ’’ON”,
the tape will stop at the tape-end and
automatically be rewound to the other end.
@® Headphone Jack:
The headphones should have an impedance
of 80hm.
® Tape Start Memory Switch:
If you set the tape counter to “000” at the
start of each recording andset the Tape Start
Memory Switch to “ON”, then the tape will
be rewound at the touch of the Rewind
Button to the preset pointamd will stop.
© Output (Line Output Level
Controls):
The output level of monitoring sound from
the tape or sound source cam be controlled
either in recording or playback.
® Line Input Level Controls
® Mic Input Level Controls
® Blend Mic Input:
These controls can be indeendently
adjusted. The Mic Input Lewel Controls do
not function unless microphones are plugged
in. During recording fromtine line input the
Mic Input Controls do notaf fect S/N Ratio.
® Blend Mic Input Jak
@® Mic Input Jack R
@ Mic Input Jack L

VOLTAGE SELECTOR
{
@ Dolby NR Switch:
Set the DOLBY NR Switch to “’IN’’ when
you play back a recorded tape made under
the DOLBY System, or when you make
recording under it. This System is
international, and recordings made under it
can be reproduced by any cassette tape deck
equipped with the same System, regardless
of its make.
@ Monitor Switch:
Source
The input signals from the sound source can
be directly monitored by adjusting the
sound volume with the Line Input/Mic Input
Controls.
Tape
To play back a recorded tape, set the Switch
to “’Tape’’.
In recording, instantaneous off-the-tape
monitoring is possible so that it will permit
instant comparison of the recording with the
input signal.
@ Power Switch:
When you turn the Power Switch to “ON”,
the Level Meters, Tape Run Indicator and
Stop Button will illuminate to show that the
power is being supplied to the deck.
2
REMOTE 3 WEAD CASSETTE
® DNL (Dynamic Noise Limiter)
Switch:
The DNL System is only effective in
playback. By using it in combination with
the DOLBY System, further improvement in
noise suppression is available. The DOLBY
System does not reduce high frequency noise
contained in input signals. The DNL on the
other hand effectively decreases such noise if
it is used in playback of a recorded cassette
made with or without the DOLBY System.
@® Limiter Switch:
After record level setting has been made, the
Peak Limiter prevents distortion from
sudden transient peaks in live recording.
@® Tape Selector Switch:
Set to “EX for high output, Nakamichi
EX, EX II tapes, and to ,,SX” for Nakamichi
SX tape. Be sure of using tapes having
proper bias level and equalization.
@ Peak Level Meter:
The Meters indicate a wide range from -40dB
to +5dB, the 0dB of which conforms to the
“DOLBY” NR Standard Level.
® Line Input Jacks
@ Line Output Jacks
@ 19 KHz MPX Filter Switch
@ Test Tone Level Calibration
@ Record Level Calibration:
Enable you to set correct Dolby level
for any cassette tape.
@ DIN Mic Input Socket:
DIN Connector must be of SM type.
@® DIN IN/OUT Socket:
To be connected with a DIN Cord.
@ AC Power Supply Cord
@ Ground Terminal
@ Voltage Selector Plug:
You can change over either to 100V, 117V,
220V or 240V.
@® Remote Control Socket
® Pitch Control:
Standard Tape Speed of 1-7/8 ips. is set at
click position in the center.
@ Alignment Beacon:
Enables to adjust the azimuth alig nment of
a recording head according to each cassette
tape (Refer to ‘Before Recording”’).
® Test Tone Switch
® Record Head Azimuth Alignment
@® Playback Head Azimuth Alignment

Connections
rm RECORD CAL =
Sx
e ©
fa
REMOTE S5ETTE SYSTEM
chi TOO
RESEARCH IMC :
n JAPAN
Connecting the Line Output: Connecting the DIN Connector Connection to Digital T imer:
Connect
to
the
Tape
Monitor
of
your
Stereo
Socket:
Set
the
socket
of
a
timer
to
“’Remote’’.
If
Amp or AUX Jacks from the Output Jacks tf your Stereo Amp is equipped witha DIN ~— you use a Remote Control, connect to the
through pin cords. Connector Socket, connect with a DIN Cord. Remote Socket of the timer.
Connecting the Line Input: In this case, please do not use pin cords
Connect to the Tape Rec Jacks of your simultaneously.
Stereo Amp from the Input Jacks through
pin cords.
BLEND
Os
Microphones and Headphone: Please use the microphones having ’ Please use the headphone tawing impedance
As shown in the above Fig., both of the impedance of 600 ohms. of 8 ohms. ;
right and left Stereo Microphones and the Insert the Stereo Headphones into the
Blend Microphone can be connected. Headphone Jack as shown in the above Fig.

Playback Procedures
POWER OUTPUT
OFF
@ Adjust the sound volume with the Output
Level Controls.
@ Turn on the Power Switch. The level
meters and the cassette compartment
window will illuminate to indicate power
supply to the deck. Also the “Stop’’ Button
will light.
@ To stop the tape, touch the Stop Button.
If you push the Eject Button, the Cassette
: Compartment Lid will open to expose the
@ Push the Eject Button and load a cassette, cassette inside.
then close the cassette compartment lid.
DAL DOLBY NR MONITOR .
tht TAPE
SOURCE
© Set the Monitor Switch to “Tape”.
© It is not necessary to touch the STOP
Button each time you rewind or fast forward
the tape during playback.
Also you can change to the playback mode
directly from the rewind or fast forward
mode without causing damage to the tape.
TAPE LIMITER DNL
Sx ON IN
DOLBY NR
LIMITER ~ DNL DOLBYNR MONITOR
ON IN iN TAPE
EX boge aur ; 5 @)
@Set the Tape Selector Switch to “EX’’
or “SX” according to the tape in use.
OFF OUT OuT
© If you play back a tape recorded under
the “Dolby System”, be sure to set the
“Dolby NR” Switch to “IN”.
© Touch the Play Button to start the tape.
@ When you push the “PAUSE” Button,
the tape run will stop momentarily.
Pitch Control
te
Standard tape speed of 1-7/8 ipsis set at
click position in the center. Any speed
within the range of + 6% (half tone) can be
selected by turning the knob to “L”’
direction for lower pitch and ’’H” direction
for higher pitch,
The tape speed of 1-7/8 ips will be always
maintained in recording, regardless of the
position of the Pitch Control Knob.
Note:
* The Nakamichi 1000 is so designed
that the Lid will not open, even if you push
the “Eject” Button while the tape is running.
* When the tape reaches its end, it will stop
automatically.
* The ‘’Peak Limiter” Switch has no effect
during playback.

Before Recording
Record Head Azimuth
Alignment Screw
Tape
Erase Head
Pinch Roller
Head Azimuth Alignment
As shown in the above Fig. the Nakamichi
1000 is of a 3-head type wherein each of
erase, recording and playback heads is
individually installed. A part of a cassette
housing in which a tape runs serves as a guide
for tape run.
As a case may be according to each plastic
moulding, the high frequency part may be
lowered because of the inaccurate azimuth
alignment of head slit between recording
and playback heads.
Accordingly, it is recommended that you
perform accurate azimuth alignment when
you change a tape to another.
Azimuth Alignment Procedures
Record Head
@ Load a cassette into the cassette
compartment.
@ Turn the Test Tone Switch on.
© Touch the RECORD Button and then the
Play Button to start the tape.
© Set the Monitor Switch to “Tape”.
© Adjust the Record Head Azimuth
Alignment (RH) Screw so that the both
Alignment Beacons flickers alternately. tf
only the left Alignment Beacon flickers, turn
the RH Screw clockwise. And if only the
right Alignment Beacon flickers, turn it
counter-clockwise.
Caution:
It takes about 0.3 second until the
Alignment Beacon responds to the turning
of the RH Screw. It is necessary to turn
the RH Screw little by little with a
reasonable interval. if you turn it to the
wrong direction, the Alignment Beacon will
not flicker. The turning direction must be
carefully determined according to the above
instructions.
It is not a fault of the deck!
Anti-Tape Spill Device:
The Nakamichi 1000 is equipped with
the tape spill sensing system which stops all
the functions of the unit instantaneously
when spill of the tape is about to start.
In case the functions of the unit stop
automatically, please check the cassette
tape first. The tape spill usually occurs with
a second Class cassette tape the housing of
which is being moulded with less precision,
and physical property of tape itself is rather
poor.
Also a thinner tape such as C-120 cassette
often causes heavy friction inside the
cassette housing which will also be sensed by
the said device.
Heads Maintenance
(1) Playback Head
No Adjustment is necessary with respect to
the playback head azimuth, since it is
adjusted prior to delivery from our factory.
(2) Head Cleaning
All parts that come into contact with the
tape must be frequently cleaned. Even the
best tape formulations leave a deposit of
oxide sheddings on the heads, pinch roller
and capstan. Failure to perform a periodic
cleaning of these parts can result in signal
dropouts, loss of high frequencies and
wow and flutter. A cleaning kit is supplied
with the Nakamichi 1000, but some Q-tips
and isopropyl alcoho! (preferably
undiluted) will perform quite adequately.
sponamenoayecter SP TE PETER MMH A
(3) Demagnetizing
All metal parts that come into contact with
the tape must be occasionally demagnetized
to prevent the build-up of residual
magnetism that can add hiss to and
partially erase the high frequencies on a
tape being played. Although the heads and
capstan of Nakamichi catsette decks require
demagnetization much less frequently than
most other tape decks, it should nevertheless
be performed once every 50 hours of use
to be on the safe side. A Nakamichi
Demagnetizer is recommended for this
purpose since it is specialy designed for
ease of use with cassette decks, but any
properly designed demagnetizer will do.
Remove all tapes from the vicinity of the
tape deck before proceeding. Make sure the
tape deck is “OFF."’ Turn the demagnetizer
on and slowly bring the tip as close as
possible to the record/pliy fheads (it is not
necessary to demagnetize the erase head).
Do not make contact wih the head unless
the tip of the demagnetiter is covered with
thin vinyl or rubber to aroicd scratching the
surface of the head (a pice of vinyl tape
may be used to cover th: tip if it is not
already covered). Move the demagnetizer
tip slowly in a random pattern about the
surface of the head for a least 10 seconds
and then slowly move it tovvard the
capstan. Repeat with thecapstan, and then
slowly withdraw the demagrtetizer. Turn it
off after it is at least 2 fet from the deck.
Never turn the demagnetzer off while it is
close to the head or capsan aS this may
semi-permanently magneize the metal part.
5

Level Calibration
Dolby NR Level Calibration
The Dolby NR standard level (200 nW/m)
of the Nakamichi 1000 is set to 0 dB.
Particularly, when you record with Dolby
NR “In” adjust the OdB signal of the built-in
400 Hz Test Tone to OdB according to each
of the tapes to be used.
‘
© Set the position of the Tape Selector
Switch according to the type of the tape in
DRL = DOLBY NR MONITOR
aN uN TAPE use.
Aeonioo sen DOLBYNR MONITOR
iN TAPE
Cy
iA
ouT SOURCE
@ Set the “Monitor Switch” to ‘Tape’.
@ If away from OdB, adjust the Tone Cal
Level to obtain the accurate OdB.
If the levels are not within 1 4B of “O
dB”, adjust the appropriate Level
Calibration Controls (Left or Right, EX or
SX) clockwise or counter-clockwise (Fig.
A or Fig. B) to obtain a O dB reading
on both meters.
Note:
The recorder must be in the record mode
with the “Monitor” switch in the “Tape”
position in order to perform this calibration.

Recommended Cassette Tapes and
Tape Selector Switch
The tape selector switch on your Nakamichi
cassette deck has been specially designed to
simultaneously change both the Bias. and
Equalization. Although the unit has been
factory adjusted for Nakamichi EX {or EX
Il) tape in the “EX” position and for
Nakamichi SX tape in the “SX’’ position,
certain other tapes shown in the
recommendation table below may be used
with excellent results. The ““EX”’’ position
utilizes the standard 120 microsecond
equalization and a “high” bias
(approximately 10% higher than normal)
compatible with a variety of low-noise/high-
output/high-density formulations. The
“SX” position utilizes the ‘high resolution”
70 microsecond equalization and a special
bias (approximately 45% higher than
normal) which allows the use of high
coercivity tapes. To realize the full
potential of your Nakamichi cassette deck,
it is recommended that you use one of the
‘following cassette tapes (tapes other than
Nakamichi are listed in alphabetical order):
Position of Tape
T Mod
Nakamichi
TDK
Nakamichi
Nakamichi
Fuji
Maxell
Maxell
TDK
C-60, C-90
C-60, C-90
C-60, C-90
C-60, C-90
C-60, C-90
C-60, C-90
C-60, C-90
C-60, C-90

Record Procedures
DOLBYNR MONITOR
iN TAPE
OFF felons OUT en Bs “™ g
@ Set the Dolby NR Switch to “IN” for @ When recording from FM Stereo
recordings free from hiss noise. Braodcasting, set the MPX Filter at the rear
panel to “ON”.
LIMITER
ON
Note:
1. The DNL is effective only in the playback
mode.
2. The Monitor Switch can be switched over
i BU ain eal to “Tape” or Source” at any time during
@ Set the Tape Selector Switch according to o recording.
the type of tape in use, to “SX” for a @ Push the Reset Button to reset the Tape 3. To prevent an accidental erasure of a
Nakamichi SX tape only and to “EX” for Counter to ‘000’. recorded cassette, break off the tabs on the
the other tapes such as Nakamichi EX, side opposite to that exposing the bare tape
EXI{ tapes. with a screw driver or the likes.
i
A cassette has ‘’Tabs”’ on the side opposite
to that exposing the bare tape. If you break
them off with a screwdriver or the likes, the
cassette will prevent the depression of the
@ Touch the Record Button and then touch Record Button, thus eliminating the
the PAUSE Button while keeping your possibility of erasing a valuable recorded
© For recordings of sound with wide finger tip on the former. The red lamp will cassette by mistake.
dynamic range, set the Limiter Switch to light to show that the deck is in the Take advantage of this feature when you
“On” then the peak limiter prevents recording mode. At another touch on the wish to preserve a cassette into which you
distortion from sudden transient peaks. PLAY Button, the tape will instantly start have made recordings. If you wish to
running to record. preserve the recording in only one side,
RES os break only one of the tabs.
eal DGLEY Ka MONITOR Touch the PAUSE Button whenever you y
ay in TAPE want to stop the tape without cancelling the Se CHS
recording mode.
Cy © Touch the Stop Button to release the
recording mode and then the tape will stop.
Our OUT SOURCE
@ Set the Monitor Switch to “Source” and © By setting the Monitor Switch to “Tape”
adjust the recording volume levels with instantaneous off-the-tape monitoring during
Line Input/Mic Input Level Control. recording is possible.
@® If you set the tape counter to “000” at Note:
the start of each recording, and set the Should you ever want to make arecording
Memory Switch to ““ON”’, then the tape will into a cassette with such tabs already
be rewound to preset point and stop at the broken, seal the tab openings with masking
touch of the Rewind Button. tape or plug it with an erasure rubber, etc.

Additional Recording and Playback Techniques
Direct Copying from Tape to T ape: reels and high quality cassette deck, alike the
You can perform Hi-Fi recording from open _ original source.
Line Inputs Left and Right, Microphone microphones, and also micog>hones L, R
Inputs Left and Right, and Blend with Blend (L + R) microgho ne can be
Microphones. As shown in the Fig below, conducted.
the mixing of a disc record with
Record Mixing:
The Nakamichi 1000 serves also as a
smail type mixer through 5 different
individual volume controls, namely

Peak Level dB Meter Cassette Lid
Removal and
Lubrication
The Nakamichi 1000 incorporates true
Peak Reading Level Meters which cover a
wide range of -40 to plus 5 dB. The
needles will move from the “Off”
indication to the (infinity mark) mark
when the power is turned on. Since the
Peak Level Meters are able to accurately
When dubbing onto the Nakamichi 1000
from a 15 ips/2 track open reel recorder,
it is suggested that the red mark at -8 dB
on the Peak Level Meters be used as a
guideline for the setting of record levels.
Play a O dB or O VU test tone on the
open reel deck. Set the input levels on
the Nakamichi to the red mark (-8 dB).
This will provide compensation for the
10
indicate sudden musical peaks, it is
possible to record with the needles
reaching O dB (occasionally even a bit
higher depending on the type of tape in
use and the type of source material being TO Remove Cassette ‘Lid:
recorded) without distorting the recording. Push the Eject Button. Pull the lid up until
it gets unlocked, then pull it forward. To fix
it on, push the lid down until it gets locked.
Lubrication:
The moving parts of the Nakamichi 1000
transport are fitted with oil-less bearings.
It is not necessary for the user to provide
lubrication.
fact that the 15 ips/2 track recorder has
greater headroom. Exact levels may
deviate from this suggested starting point
since open reel recorders vary in available
headroom as do the recording practices of
open reel users. For 7-1/2 ips open reel voltage selector
tapes try -5 dB as a starting point = -2 :
dB for 3-3/4 ips. On the Power Supply Voltage:
While your Nakamichi Tri- Trace is adjusted
to the power supply voltage of your country :
prior to shipment from our factor y, it may
be readjusted to one of the foury oltages.
100, 117, 220 and 240V .. should you ever
move to an area where the powe supply
voltage is different. No adjustment is
necessary with respect to the freywiency of
the power,
220V— Eom TOY

Double Noise Reduction System
The Nakamichi 1000 incorporates the 2
Famous Noise Reduction Systems, namely
the Dolby Noise Reudction System and
DNL (Dynamic Noise Limiter) developed
by Philips, which enable to surpress
unimaginable noise level.
Dolby NR
Your Nakamichi 1000 incorporates the
Dolby Noise Reduction System (under
license from Dolby Laboratories, Inc.)
originally developed to produce a master
tape from which to cut records with a high
signal-to-noise ratio.
Noise heard from a recorded cassette
primarily comprises tape noise and the noise
produced by the playback equalizer
amplifier of the cassette tape deck, and is
largely distributed over a 2KHz to 10KHz
range. Such noise can be effectively reduced
by amplifying signals within this range at the
time of recording, then attenuating them in
playback, through a process as illustrated in
Fig. 1.
INPUT — PREAMP. -| DOLBY | REC.AMP.
= cg en ae C _. PLAYBACK __
EQ. AMP.
— PREAMP. - OUTPUT
Fig.1 Record/Playback Process
This treatment is given to such signals
regardless of their strengths, however, strong
high-frequency signals cannot be recorded.
So it is necessary to change the gain of this
Briel & Kyeer
Briiel & Kicer
Copenhagen
Potentiameter Range’ dB Rectifier:
Lower Lim Freq:
special circuit with respect to the strength of
the high-frequency signals. The Dolby
circuit makes this possible.
For instance, if high-frequency signals of
—40dB enter the Dolby circuit from input
terminals, it delivers signals of —30dB for
recording on to the tape. Conversely, if
high-frequency signals of —30dB enter the
same circuit from the playback head (Fig. 2),
it delivers signals of —40dB for reproduction
from the stereo amplifier.
Thus input/output signals are attenuated by
10dB, with equivalent reduction in the level
of tape noise and equalizer amplifier noise.
The circuit is designed so that it does not
affect signals of —5dB or greater.
Input Signals
-30
4
1
1
t
1
1
|
'
i}
if
'
4
|
|
|
|
1
sjeuBig jnding
PLAY
Amplification & Attenuation at 4KHz
Fig.2 Working Principle of Dolby NR Circuit
As is clear from the foregoing explanation,
the signal-to-noise ratio of sound improves
by about 10dB if it is recorded and
Briel & Kjoee Britel & Kjaer
Hz Wi Speed —.__ mm/sec Paper Speed:____ mm/sec.
sasites dB ABI
\
40-207
Measuring Obj: fT
af
nena
Dolby NR out:
OP 1124
Multiply Frequency Scale by
=== Dolby NR + ONL Eps
40000 20000
(1632/2012)
reproduced through the Dolby circuit,
enabling you to enjoy clean, transparent hi-fi
stereo sound. This system is international,
and recordings made under it can be
reproduced by any cassette or reel-to-reel
tape decks equipped with the same system,
regardless of their makes.
DNL (Dynamic Noise Limiter)
= we a T) roe eS
- eae
Fig. 4 DYNAMIC NOISE LIMITER : Steady-state characteristics.
Parameter : Level Vi in dB, Od} = 780mvV.
When set to “On”, DNL operates only whiie
playback. It also operates at Source Monitor
but has nothing to do with recording. As
shown in the above Fig, DNL serves
lowering more noise where level is low, it
further decreases noise while the Dolby NR
and S/N Ratio are in the preferable
condition.
The detailed data are shown below for your
ready perusal wherein dewease of only 3dB
will result in a great effeci from the acoustic
standpoint.
It also gives an effect when hiss noise or
scratch noise is noted fron the source.
11

Trouble Shooting Chart
CONDITION PROBABLE CAUSE REMEDY
Tape does not run. 1. Power cord is unplugged. Plug in power cord firmly.
2. Tape is loose inside cassette. Wind tape up.
3. Cassette lid is not firmly closed. Take out cassette and reset it carefully.
RECORD Lamp does not light. 1. Cassette is not loaded. Load cassette.
2. Cassette tabs are broken off. Place a piece of adhesive tape over
the tab opening.
3. PAUSE Button is touched. Release Pause mode.
Hissing sound is heard in playback. 1. Head is magnetized. Demagnetize head with a head demagnetizer.
Tape travel is unsteady. 1. Capstan shaft and/or pinch roller are Clean those parts.
dirty.
2. Tape winding inside cassette or tape Replace cassette.
guides are faulty.
Previously recorded sound remains. 1. Erase head is contaminated. Clean the erase head and pinch roller,
Reproduced sound is distorted. 1. Program material itself is distorted. Examine program material.
2. Recording volume levels are too high. Adjust appropriate recording level
controls.
In case it is distorted at transient peaks,
turn on the Peak Limiter Switch.
Cannot record. 1. Connection to each part is incorrect. Check connections.
2. Record head is contaminated. Clean head.
Cannot reproduce. 1. Connection to each part is incorrect. Check connections.
2. Monitor switch is set to “SOURCE”. Switch over to “TAPE”
3. Playback head is contaminated. Clean head.
Treble tones are weak. 1. Record head azimuth is not adjusted Adjust azimuth to match the cassette
precisely. used.
Large hum noise is heard in recording 1. Disturbing induction field exists nearby Keep away from amplifier, transformer,
or playback. the deck. fluorescent lamp, etc.
2. Connector cord grounding is defective. Use the perfect connector cord.
=
2

Specifications
Power Supply ..........00+- 0c eee
Power Consumption
Tape Speed
Wow & Flutter..............-2000-
Frequency Response
Signal to Noise Ratio
Total Harmonic Distortion
Erasure
Channel! Separation
Cross’ Tal k:.-«. cetdiee alta sltheen aca
Bias Frequency
Transistors
Diodes
ICS: 55 Sates ss eine
Input:
Mic: lnpult sia edit te sete ee eat slelletie
Blend Mic... ...... 0.22. eee eee
DIN Mic Input. ...............00..
LING ee dee ge Be hs Sed
DIN Radio ......
Output:
Line ....
DIN Line Output
Headphones...
Dimensions
e
further improvement without notice.
of Dolby Laboratories Inc.
DS-170 Digital Timer
. BOW Max.
. 0.5mV 6000hm
. 0.6mV 6000hm
Specifications and appearance design are subject to change for
Dolby NR under license from Dolby Laboratories Inc.
The word “‘DOLBY NR” and the Double-D-Symbol are trademarks
Condenser Microphone
CP-101 capsule CP-102 capsule option
Optional
Accessories
100, 117, 220, 240V 50/60 Hz
1-7/8 ips. + 1%
Less than 0.1% (DIN 45507 Weighted Peak)
35 - 20,000 Hz +3 dB
(Dolby NR In, SX or EX Il Tape)
Better than 65 dB
(Dolby NR In, Wrms, CCITT, 400Hz,
3% Distortion)
Less than 1.5% (at 400Hz, 0 dB)
Better than 60 dB
(at 1 KHz, Saturation Level)
Better than 35 dB (at 1 KHz, 0 dB)
Better than 60 dB (at 1 KHz 0 dB)
105 KHz
0.5mV 6000hm
100mV 47Kohm
10mV 27Kohm
1.0V (Max.) Variable
1.0V (Max.) Variable
1 mW 0 dB
20-11/16'(W) x 11-11/167(H) x 8-5/8’(D)
ae it
Electret Condenser Microphirse
CM-300
CP-1 capsule
CP-2 capsule
CP-3 capsule option
CP-4 capsule option
CM-1000
13