Daiwa DK-200 User manual

DAIWA
ELECTRONIC KEYER
MODEL DK-200
MODEL DK-210

INTRODUCTION
The DK-200/DK-210 functions as a squeeze keyer with the DASH/DOT memory
The ratio of DASH/DOT and SPACE can be adjusted with the WEIGHT Control
With the WEIGHT control feature, you can adjust for the best DASH/DOT and SPACE ratio for each
operating speed
Two types of keying outputs are available: GRID BLOCK and DIRECT
A side-tone oscillator built in
LED speed indicator (Model DK-210 only)
The DK-200/DK-210 can be powered by a 9 Volt battery
Three modes: Automatic, Semi-Automatic and Tune (continuous tone) can select by MODE switch
SPECIFICATIONS
Speed 8 WPM 50 WPM
Side-tone oscillator frequency 500 3000 Hz
Keying output circuitry GRID BLOCK: 100 V, 10 mA max
DIRECT: +300 V, 100 mA max , –100 V, 10 mA
Power consumption 13 8 VDC (9 15 V) approx 100 mA / DK-200
200 mA / DK-210
or a 9 Volt battery can be installed inside the cabinet
Dimensions 150 mm W × 62 mm H × 150 mm D; 0,9 kg
LED Speed indicator DK-210 only
Other
RCA plug 2 pcs
Stereo phone plug 1 pc
DC plug with cord 1 pc
NOTE: The keyer can be operated by an AC adaptor (DC 12 V, 200 mA; maximum voltage of the
adaptor should not be exceeded DC 15 V when no load connecting)
PARALLEL CONNECTION OF TRANSCEIVERS

OPERATION
1 Speed indicator: The LED indicates the speed of code transmitted in WPM
2 Pilot LED: The pilot LED glows when the LINE switch is on
3 LINE Switch: The LINE Switch supplies power to the DK-200/DK-210
4 Speed control: The speed of keying is indicated by turning the Control
5 Weight Control: Ratio of DASH/DOT and SPACE is adjusted with this Control Setting the con-
trol knob at the fully clockwise position produces a perfect 1:3:1 DOT/DASH/
SPACE ratio Turning the knob counter-clockwise will decrease the ratio
6 Monitor Volume: Audio level of side-tone oscillator can be adjusted The knob at fully counter-
clockwise position is minimum output Turning the knob clockwise increases
audio output
7 Mode Switch: Three modes can be selected:
AUTO: The keyer works as fully automatic keyer
SEMI AUTO: The keyer works as semi automatic keyer or "Bug Key"; DOTS
are generated automatically while DASHES are controlled
manually
TUNE: The keying output is shorted whenever the Mode Switch
turned to the TUNE position
8 Key Jack: Solder a two conductor shielded cable to the phone jack supplied as shown
in fig 3 Insert the wired plug into the socket

9 Monitor Speaker: For side-Tone reproduction
10 DC socket Connect the DC plug supplied to a regulated power supply according to the
fig 1 Insert the DC plug to the DC socket
11 Keying output GRID BLOCK: The GRID BLOCK keying output can key negative 100 V
(10 mA max ) to ground This output can key all transceivers
with GRID BLOCK keying circuits
12 Keying output DIRECT: The DIRECT keying output can key 300 V (100 mA max ) to
ground
13 Side-tone frequency trimpot: Frequency of oscillator can be adjusted between 500 and
3000 Hz

CAUTION
Be sure to check the keying in your transmitter before connecting the DK-200/DK-210 (Either
GRID BLOCK or DIRECT) IF your transmitter seems to key continuously, use the other DK-200/DK-
210 keying output It is best to to verify the keying method used in your transmitter before con-
necting the keyer
Two transceivers can be connected to the keyer simultaneously Be sure to use the silicon diode
arrangement for current protection The total current flowing through the keying output circuitry
must not exceed the maximum current rating of the keyer!
NOTE
For a protection of an RF feed back in the keyer when a station operates with high power output,
it is necessary to use better quality shielded wires for the keying output and/or the key input All
connecting wires used including the main lead should be connected as shortest as possible
Operatin by a battery
The keyer can be operated by battery (9 Volt) A battery holder is provided inside the cabinet for
connecting a 9-Volt-battery The battery is cut off whenever the DC plug is connected in the DC
socket It is recommended to set the side-tone output at low level in order to conserve battery life
DK-210
It is also suggested to disable the speed indicator LEDs for saving the battery life The LEDs can
be disabled by cutting the orange-color lead between the PC board of the LED and the LINE
switch