Globephone GS-8008 Space Commander Instruction Manual

12 BAND PROFESSIONAL

MONITOR RECEIVER

SPACE COMMANDER®

GS 8008 DX

INSTRUCTION MANUAL

INTRODUCTION

This is an All-wave Transistor Radio Receiver capable of listening to the broadcasts and receiving communications from all over the world in full range of radio waves, thoroughly from the Long wave-length (LW) to the Ultrahigh wave frequency band (UHF). In this respect, this is the first of its kind in the world. Being equipped with the digital Frequency Counter, it will enable you to read the frequency of the waves you receiving exactly.

Please enjoy yourself with the splendid sound quality and power output of this radio set.

IMPORTANT SPECIFICATIONS

1. Full coverage of 12 bands:
   LW, MW, SW x 4, VHF x 5 and UHF.

2. Equipped with Frequency Counter Display:
   LW~ SW (Direct reading up to 1 KHz).
   VHF1~5 (Direct reading up to 10 KHz).
   UHF (Not displayed)

3. Three way system available of AC, Batteries (UM-1 x 8) and External Supply (Car or Boat Batteries) for source power.

4. IC-power-amplifier for 5W power output.

5. Equipped with Bass, Treble Tone Control circuits capable of sound quality adjustment in full-fledged perfection.

6. Gear system adopted as tuning mechanism.

7. External antenna terminals additionally provided with a coaxial jack.

8. Additionally provided with three independent Telescopic Antennas matching to each band.

9. Adoption of low noise FET for AM and VHF tuners to improve anti-interference and sensitivity characteristics.

10. Double super heterodyne system highly effective against image interference:
    SW2, 3,4, VHF1, 2,5 and UHF.

11. RF Gain control for AM provided for the best adjustment of radio wave intensity.

12. Antenna adjusting control for AM capable of best matching with the antenna.

13. BFO pitch control for AM well facilitating the selection of SSB/CW reception.

14. Wide-Narrow switch for AM capable of change-over in selectivity corresponding to an aimed radio-wave.

15. Enhanced stability by employing crystal for the VHF second local oscillator.

16. VHF second IF circuit adopting a ladder type ceramic filter which brings sharp selectivity.

17. Squelch control for VHF and UHF (not workable for VHF4) for stable reception and for cutting interstation noise in selecting station.

18. Provided with a jack for tape recording and playback, and a Headphone jack.

LOCATION OF CONTROLS

1. Power switch
2. Light and Display ON-OFF switch
3. Wide – Narrow Selector
4. USB – NOR – LSB • CW selector
5. Radio – Tape selector
6. Volume control
7. Treble control
8. Bass control
9. RF Gain and BFO pitch control
10. Antenna adjust control
11. Tuning control
12. SW calibrator
13. Signal meter
14. Digital frequency counter display
15. AM – VHF selector
16. AM Band selector
17. VHF Band selector
18. Squelch control
19. Telescopic antenna for SW2 – SW4
20. Telescopic antenna for VHF
21. Telescopic antenna for UHF
22. Tape (IN – OUT) jack
23. EXT. Speaker and Headphone jack
24. Car or DC 12V Supply jack
25. Earth (Ground)
26. EXT. SW Antenna jack
27. EXT. VHF and UHF Antenna jack
28. EXT. ANT – TEL. ANT selector

A. PREPARATION FOR RECEPTION

1. ANTENNA CONNECTION

For LW, MW and SW1, you can enjoy them with a built-in ferrite bar antenna, and can also enjoy satisfactorily local reception of SW2, 3, 4 and VHF broadcasts even with the Telescopic antenna provided in this set.
For regular reception of shortwave broadcasts and amateur stations, however, the use of external antenna explained in another item is recommended.
In addition, since an antenna change-over switch is mounted in the rear cabinet of this set, extend the Telescopic antenna with the switch set to TEL position when used, and mount the external antenna with the switch set to EXT position when used.

2. BUILT-IN BATTERIES AND EXTERNAL POWER SUPPLY

1. This set provided a three way system available for built-in batteries and external DC power supply as well as AC power supply.
   In normal use, the AC power supply operates first with priority, being switched over auto-matically to the built-in batteries when the AC power supply is stopped due to a power failure or else.

2. The built-in batteries are used with eight UM-1 (“DD” size dry cell) batteries connected in series. Insert the dry batteries in the rear battery case placing in correct polarization of + – .

3. The external power supply can be used within a voltage from 12 to 15V, on the basis of 13.2V such as car battery, etc.

3. HOW TO USE DIGITAL FREQUENCY COUNTER

1. When the Light and Display switch is turned ON, a light on the scale board is lit and the Frequency Counter displays figures in fresh green color.
   This Frequency Counter reads directly the AM Band up to 1 KHz and the VHF Band up to 10 KHz, so that the receiving frequency can be correctly read, but the UHF Band is not displayed.

2. You can save battery power consumption by turning the Light and Display switch OFF during operation other than tuning in the case of operation with power supplies other than the AC power supply.

3. When selecting stations on SW2, 3, 4 Bands, make use of the SW calibrator to pinpoint the tuning.
   First, tune in to the ‘Standard Signal’ which can be obtained in your locality, usually at 5.0, 8.0, 10.0 or 15.0 MHz., and then, adjust the SW calibrator to the position where the pointer of the Signal Meter swings to the extreme right. Now you will obtain the most accurate SW frequency read-out.

4. Beating noise may sometimes occur a little on some bands at the “ON” position of Display, and in such case, you can receive with clear sound by turning the Display switch OFF. Whether the noise comes from beating or not, it can be made sure by turning the Display switch from ON to OFF.

B. RECEPTION OF SIGNALS OF LW, MW AND SW1 – SW4

1. Set the knobs of the receiver as follows:

• Power switch ON
• Display switch ON
• WIDE – NARROW WIDE position
• USB – NOR – LSB NORMAL position
• RF Gain control Extreme right (Normal position)
• Radio – Tape selector Radio position
• SW calibrator Approx. center (Refer to A-3-3) when the SW2, 3, or 4 Band is required to be set correctly.
• AM – VHF selector AM position
• AM Band selector Desired Band

2. When using the Telescopic antenna in the case of receiving SW2~4 Band, extend the SW Telescopic antenna with the ANT selector in the rear cabinet turned to the TEL position (lower side).

3. Receive signals by turning the Tuning control knob. At this time, correct read-out of frequency can be made since the Frequency counter operates as well as the dial pointer. Set the Tuning knob and the Antenna adjust knob so that the signal meter indicator will swing to a maximum, and adjust the Volume control knob so that the sound volume will become easily audible, and at this time also adjust the Bass and Treble controls to obtain the desired sound quality.

4. When any voice distortion exists due to an excessively intense signal, turn down adequately the RF Gain control counterclockwise.
In addition, in the case of intense jamming, turn the WIDE – NARROW ‘selector to NARROW, and the receiving bandwidth will become narrow to improve the articulation.

C. RECEPTION OF SSB SIGNAL OR CW SIGNAL

• You can receive the SSB signal if you search for amateur bands.
  The SSB signal switches the pointer of the Signal Meter when the meter setting is left at the AM position, therefore the contents of the signal are difficult to be understood.
  The CW signal is composed of intermittent carrier waves (in a form of Morse code) without voice on various other frequencies besides the amateur bands.

1. Make settings in the same manner as in the case of B, except for the following knobs:

USB – NOR – LSB-CW

• USB or LSB-CW position (For SSB, set the knob to USB at frequencies not less than 10 MHz, and to LSB position at frequencies less than 10 MHz.
• LSB – CW position at CW reception.

BFO pitch control

• Approx. center.

2. For the SSB signal, receive it with the Tuning control knob turned slowly and tune so that the contents may be understood.
Next, adjust the sound so as to be easily audible by turning the BFO pitch control clockwise and counterclockwise.
When the contents of the signal cannot be understood by all means, reverse the positions of LSB and USB and try again.

3. For CW signal, adjust the sound so as to be easily audible by turning the BFO pitch control.

4. When an intensive signal is present close to the aimed signal and its sidebands or other noises come into the set, these noises are sometimes eliminated by turning down the RF Gain a little counter-clockwise. That is to say, turn the Volume control a little clockwise in advance, and try to adjust the sound volume with the RF Gain control, then the reception of the SSB signal will become easily audible.

D. RECEPTION OF SIGNALS OF VHF 1 ~ 5 AND UHF

1 Set the knobs of the receiver as follows:

• Power switch ON
• Display switch ON
• Radio — Tape selector Radio position
• AM — VHF selector VHF position
• VHF Band selector Desired band
• Squelch cotrol Extreme left (MIN position)

2. When using the Telescopic antenna, extend the VHF or UHF Telescopic antenna with the rear cabinet ANT selector turned to TEL position (lower side).

3. Receive signal by turning the Tuning control. Turn the Tuning knob slowly so that the swing of the Signal Meter will become maximum. At this time turn the Telescopic antenna slightly or adjust its length corresponding to the frequency, and you will find a point where the pointer of the Signal Meter swings further clockwise. This point will give the best receiving condition.

4. Since the squelch control is effective except for VHF4, turn the Squelch control clockwise until the noise disappears when bothered by it at detuning, thereby the inter-station noise in selecting stations is cut off and the stable reception will be obtained.

E. OTHER HANDLING EXPLANATIONS

1. When the Tape (IN — OUT) jack is connected to a tape deck at hand with the Din cord, radio wave recording can be made. At this time, the Radio – Tape switch is to be turned to the Radio position.
   The playback sound of the tape deck is audible by turning the switch to the Tape position.

2. Since the Headphone jack is also provided, use it for midnight reception, etc.
   The built-in speaker is disconnected when the Headphone plug is inserted.
   You can also operate another speaker through this jack.

Connection of outdoor antenna

There are two antenna terminals for VHF and SW on right side of the set.
VHF: Use 50 – 100 ohm balanced antenna.

1. VHF ANTENNA
2. to VHF ANTENNA terminal

SW: Connect the antenna wire of more than 5 meters long to SW antenna terminal and extend it outdoors as high as possible.

1. to SW ANTENNA terminal

It is recommendable to use Doublet antenna for receiving specified broadcast.

The length of “L” can be found with following formation.

L (m) = 143 / Tuning frequency (Mhz)

Use feeder wire with 50 or 75 ohm coaxial antenna cable.

1. to SW ANTENNA terminal
2. DOUBLET ANTENNA

CONNECTIONS OF EXTERNAL TERMINALS

1. RADIO
2. EXT SPEAKER HEADPHONE
3. IN /OUT
4. TAPE

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