KDS EQ-2000 User manual
1
INSTRUCTION MANUAL
For
KDS EQ-2000 MICROPHONE EQUALIZER
Thank you for purchasing our product EQ-2000 MICROPHONE EQUALIZER.
EQ-2000 MICROPHONE EQUALIZER is a high performance microphone equalizer having a specially designed
low-noise microphone amplifier for HF bands for an amateur radio station.
Please read this instruction manual carefully before using this unit for maximum performance and save this
instruction manual for future reference.
FEATURES
1. VERSATILE IN MICROPHONE INPUT: it can be used in 8 pin microphone circular plug (N-16-8P)
or 8 pin modular plug (RJ-45); either of the above two types of microphone plugs can be used by
changing an internal wiring of EQ 2000 for any kind of transceiver.
2. 2-WAY POWER: (1) Most transceivers providing DC 5-9 volts for the microphone can power the EQ-
2000 by proper wiring of microphone cord, (2) 4 pin old type transceiver or tube type transceiver
can be externally powered by DC 8-18 volts through the DC terminal of EQ-2000 with a battery or
well regulated power supply.
3. LOW TONE and HIGH TONE CONTROL: Because it is designed for voice communications operating in
400 - 3,000Hz, it is possible to have quality communication even under the heavy noise in HF bands.
CONTROLS and How to use
1. MIC INPUT A: 8 pin microphone circular plug (N-16-8P)
Connects a general 8 pin circular plug. MIC INPUT B cannot be used with MIC INPUT A at the same time.
2. MIC INPUT B: 8 pin Modular plug (RJ-45)
Connects modular plug. MIC INPUT A cannot be used with MIC INPUT B at the same time.
3. Power Switch ON: EQ-2000 in service; OFF: shut down the EQ-2000
4. Power LED: lights up when POWER Switch is on
5. MIC GAIN VOLUME: Variable for audio signal
6. LOW TONE Control (BASS Mark): variable low tone
7. HIGH TONE Control (Treble Mark): Variable high tone
2
8. EQ OUTPUT (8 pin circular plug; pin configuration: please refer to Table 9)
Connects a proper microphone cord (Optional) for the transceivers
9. Ground
While using this unit, in case of high VSWR with antenna, leakage of coaxial cable, external power supply
noise, external noise, etc., connect a wire between the transceiver and ground terminal of this unit.
Please try this when such noise is involved and enjoy communication without any noise.
10. POWER INPUT TERMINAL
Most recent transceivers providing DC 5 - 9 volts for the microphone can power the EQ-2000 by proper
wiring of microphone cord. However, 4 pin old type transceiver or tube type transceiver does not provide
power from the microphone connector. In such case, you can externally power DC 8 - 18V through the DC
terminal of EQ-2000 with a battery or low ripple well regulated power supply or AC adaptor.
Wiring method for various transceivers
Please refer to the following Table 1 to Table 8, and Figure 1.
Method to change the wiring is as follows: 1. Loosen 4Ea of M3*8 nut from top cover; 2. Connect a CON1,
CON3, J1, J2, J3, and PCB ground terminal to your microphone after referring to the following Tables.
Table 1. DTM-501/502 desktop microphone
Table 2. ICOM 8pin circular plug (I-8P): IC-707, 721,726,729,736,746,756,760,761,765,775,781,821,
Table 3. ICOM 8pin modular plug (I-8M): IC-706 Series
Table 4. KENWOOD and ALINCO 8pin circular plug (K-8P): TS-50, 140, 440,450,570,690,790,850,
870, 940,950,2000, DX-70, DX-77
Table 5. KENWOOD 8pin modular plug (K-8M): TS-V7, D-700,
Table 6. YAESU 8pin circular plug (Y-8P): FT-847, 920,990,1000MP,
Table 7. YAESU 8pin circular plug (P-88Y): FT-840, 1000,1011,1021,
Table 8. JRC 8pin circular plug: JRC-135, 145, 245
Table 9. Others
Please contact us regarding other transceivers or microphones not mentioned above
Cautions
1. For microphone input: in case of dynamic microphone, place the internal jumper (JP1) to the OFF
position. Factory setting is at the ON position.
2. Microphone cord (optional) is marked for Microphone side and Equalizer side on plugs. Please be
sure to properly connect plugs; otherwise, it causes a malfunction or does not operate properly.
3. Please avoid placing it in a place with direct sunshine, high temperature or high humidity.
This will cause a malfunction or improper operation.
4. We are not responsible for any malfunction caused by your modification of the unit.
3
5. Circuit, specification, ratings, and design are subject to change without notice due to advancements in
technology.
6. After service: Our products are manufactured under extensive quality control and testing. If the unit
becomes inoperable, or malfunctions during the transportation or normal use, please ask for service
at a sale’s representative or KDS Communications Company.
SPECIFICATION
1. Model -------------------------- EQ-2000
2. Input impedance -------------------- 100 kΩ
3. Microphone gain (Variable type)
3.1 Low cut or boost -------- ±12dB@490Hz
3.2 High cut or boost -------- ±12dB@2,800Hz
4. Microphone input
4.1 8pin circular plug (N-16-8R)
4.2 8pin modular plug (RJ-45)
5. Microphone output: 8pin circular plug (N-16-8R)
6. Maximum input level ------------------- 500 mV r.m.s
7. Frequency response characteristic ------------------ 200 Hz ~ 10 kHz
8. Distortion ---------------------------- Less than 1.5%
9. Power consumption -------------------- Less than 9 mA @DC13.8V
10. Dimensions -------------------------- 125 * 40 * 153mm (W * H * D)
4.9 * 1.6 * 6 inch(W * H * D)
11. Weight------------------------------ 450 grams (About 1 lb)
12. A/S Contact: KDS Communications Co., Ltd.
MA-2512 Kuro jonghap yutong dangi, #1258 Kurobon-dong, Kuro-gu, Seoul, Korea
Phone: +82-2-6679-7411/2 URL: http://www.kds-mic.co.kr
Wiring for various Microphone
Table 1. KDS’s DTM-501/502 desktop microphone
Connector pin Color Function Connection
terminal
Remarks
CON3-3 Orange PTT J3-3
CON3-4 Yellow PTT GND J3-4
CON3-5 Green UP J3-5
CON3-6 Blue DOWN J3-6
CON3-7 Purple U/D com. J3-7
CON3-8 White +B Power J3-8
J1-1 Red Circuit +B J2-8
4
supply
J1-4 Black MIC input J3-2
PCB ground Black GND J3-1
CON1-1 Brown MIC GND J2-1
CON1-2 Red MIC IN J2-2
CON1-3 Orange PTT J2-3
CON1-4 Yellow PTT GND J2-4
CON1-5 Green UP J2-5
CON1-6 Blue DOWN J2-6
CON1-7 Purple U/D Com. J2-7
CON1-8 White +B Power J2-8
* CON 2(Modular input) does not connect to microphone
표2. ICOM 8pin circular plug (I-8P): IC-707, 721,726,729,736,746,756,760,761,765,775,781,821
Connector pin Color Function Connection
terminal
Remarks
CON3-3 Orange PTT J3-3
CON3-4 Yellow PTT GND J3-4
CON3-5 Green UP J3-5
CON3-6 Blue DOWN J3-6
CON3-7 Purple U/D Com. J3-7
CON3-8 White +B Power J3-8
J1-1 Red Circuit +B
supply
J2-8
J1-4 Black MIC input J3-1
PCB Ground Black GND J3-2
CON1-1 Brown MIC IN J2-1
CON1-2 Red +B Power J2-8
CON1-3 Orange UP J2-5
CON1-4 Yellow SQUELCH N/A
CON1-5 Green PTT J2-3
CON1-6 Blue PTT GND J2-4
CON1-7 Purple MIC GND J2-2
CON1-8 White AF OUT N/A
CON 2(modular input) does not connect to microphone
Table3. iCOM 8pin modular plug (I-8M): IC-706 Series
Connector
pin
Color Function Connection
terminal
Remarks
CON3-3 Orange PTT J3-4
CON3-4 Yellow PTT GND J3-7
CON3-5 Green UP J3-3
CON3-6 Blue DOWN N/A
CON3-7 Purple U/D Com. J3-6
5
CON3-8 White +B Power J3-2
J1-1 Red Circuit +B
supply
J2-2
J1-4 Black MIC input J2-5
PCB gnd Black GND J2-8
CON 1(8pin circular plug) does not connect to microphone
Table 4. KENWOOD and ALINCO 8pin circular plug (K-8P):
: TS-50, 140,440,450,570,690,790,850,870,940,950,2000, DX-70, DX-77
Connector
pin
Color Function Connection
terminal
Remarks
CON3-3 Orange PTT J3-3
CON3-4 Yellow PTT GND J3-4
CON3-5 Green UP J3-5
CON3-6 Blue DOWN J3-6
CON3-7 Purple U/D Com. J3-7
CON3-8 White +B Power J3-8
J1-1 Red Circuit +B
supply
J2-8
J1-4 Black MIC input J3-1
PCB
ground
Black GND J3-2
CON1-1 Brown MIC J2-1
CON1-2 Red PTT J2-3
CON1-3 Orange DOWN J2-6
CON1-4 Yellow UP J2-5
CON1-5 Green +B Power J2-8
CON1-6 Blue SQUELCH N/A
CON1-7 Purple MIC GND J2-2
CON1-8 White PTT GND J2-7
CON 2(Modular input) does not connect to microphone
Table 5. KENWOOD 8pin modular plug (K-8M): TM-V7A, D-700
Connector pin Color Function Connection
terminal
Remarks
CON3-3 Orange PTT J3-8
CON3-4 Yellow PTT GND J3-5
CON3-5 Green UP J3-6
CON3-6 Blue DOWN J3-2
CON3-7 Purple U/D Com. J3-3
CON3-8 White +B power J3-7
J1-1 Red Circuit +B
supply
J2-7
J1-4 Black MIC input J3-1
PCB ground Black GND J3-4
6
CON 1(8pin circular plug) does not connect to microphone
Table 6. YAESU 8pin circular plug (Y-8P): FT-847, 920,990,1000MP,
Connector pin Color Function Connection
terminal
Remarks
CON3-3 Orange PTT J3-3
CON3-4 Yellow PTT GND J3-4
CON3-5 Green UP J3-5
CON3-6 Blue DOWN J3-6
CON3-7 Purple U/D Com. J3-7
CON3-8 White +B Power J3-8
J1-1 Red Circuit +B
supply
J2-8
J1-4 Black MIC input J3-1
PCB ground Black GND J3-2
CON1-1 Brown UP J2-5
CON1-2 Red +B Power J2-8
CON1-3 Orange DOWN J2-6
CON1-4 Yellow FAST N/A
CON1-5 Green PTT GND J2-4
CON1-6 Blue PTT J2-3
CON1-7 Purple MIC GND J2-2
CON1-8 White MIC J2-1
CON 2(Modular plug) does not connect to microphone
Table 7. YAESU 8pin circular plug (P-88Y): FT-840, 1000,1011,1021
Connector pin Color Function Connection
terminal
Remarks
CON3-3 Orange PTT J3-3
CON3-4 Yellow PTT GND J3-4
CON3-5 Green UP J3-5
CON3-6 Blue DOWN J3-6
CON3-7 Purple U/D Com. J3-7
CON3-8 White +B Power J3-8
J1-1 Red Circuit +B
supply
J2-8
J1-4 Black MIC input J3-1
PCB ground Black GND J3-2
CON1-1 Brown UP J2-5
CON1-2 Red U/D Com. J2-7
CON1-3 Orange DOWN J2-6
CON1-4 Yellow FAST N/A
CON1-5 Green - N/A
CON1-6 Blue PTT J2-3
CON1-7 Purple MIC GND J2-2
CON1-8 White MIC J2-1
7
CON 2(Modular plug) does not connect to microphone
Table 8. JRC 8pin circular plug: JRC-135, 145, 245
Connector pin Color Function Connection
terminal
Remarks
CON3-3 Orange PTT J3-3
CON3-4 Yellow PTT GND J3-4
CON3-5 Green UP J3-5
CON3-6 Blue DOWN J3-6
CON3-7 Purple U/D Com. J3-7
CON3-8 White +B Power J3-8
J1-1 Red Circuit +B
supply
J2-8
J1-4 Black MIC input J3-1
PCB ground Black GND J3-2
CON1-1 Brown UP J2-5
CON1-2 Red - N/A
CON1-3 Orange DOWN J2-6
CON1-4 Yellow +B Power J2-8
CON1-5 Green PTT GND J2-4
CON1-6 Blue PTT J2-3
CON1-7 Purple MIC GND J2-2
CON1-8 White MIC J2-1
* CON 2(Modular plug) does not connect to microphone
Table 9. Others: Please contact KDS for details
EQ-2000 Output connector pin configuration
1. MIC GND
2. MIC IN
3. PTT
4. PTT GND
5. UP
6. DOWN
7. UP/DOWN common
8. 8. +B Power (+DC 5~9V)
8
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