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SuperStar 7000DX | Radioaficion Ham Radio

SuperStar 7000DX

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SUPER STAR 7000DX  150W SSB Radio

3360 Channels All-Mode AM/FM/USB/LSB Built in Frequency Counter Mobile Transceiver with Roger Beep

SUPER STAR 7000DX  150W SSB Radio


Specifications


GENERAL


Frequency range

A   - 25.615 to 26.055 MHz


B   - 26.065 to 26.505 MHz


C   - 26.515 to 26.955 MHz


D   - 26.965 to 27.405 MHz


E   - 27.415 to 27.855 MHz


F   - 27.865 to 28.305 MHz


G   - 28.315 to 28.755 MHz

Channels.

Total 3360 : 280X4 MODE


280 ( + 10kHz) X4 MODE


280 (-10kHz) X4 MODE

Frequency Control

Phase Lock Loop (PLL) synthesizer.

Frequency space

10 kHz

Emission

AM/FM/USB/LSB

Microphone

Plug-in dynamic; with push-to-talk switch and coiled cord.

Input Voltage

13.8V DC nominal, 15.9V max., 11.7V min.


(negative ground).


Transmit: AM full mod., 10A.


SSB 150 watts PEP output, 20A.


Receiver:   Squelched, 0.5 A.


Maximum audio output, 1.2A.

Size

62X200X309 mm

Weight

approx, 2.6kg

Antenna Connector

UHF, S0239.


TRANSMITTER


Power Output

HI     MID    LO


AM     50      25     5


FM     50      25     5


SSB    150     75     15

Modulation

low-level Class B, Amplitude Modulation: AM.


Variable capacitance Frequency Modulation: FM.

Intermodulation Distortion SSB:        3rd order, more than —25 dB.


5th order, more than —35 dB.

SSB Carrier Suppression

50 dB

Unwanted Sideband

50 dB

Frequency Response

AM and FM: 450 to 2500 Hz.

Output Impedance

50 ohms, unbalanced.


RECEIVER


Sensitivity

SSB : 0.3 tiV for 10 dB (S+ N)/N at greater than V>-


watt of audio output.


AM: 1 juV for 10 dB (S + N)/N at greater than V>-


watt of audio output.


FM: 1.0 mV for 20 dB (S + N)/N at greater than Y>-


watt of audio output.

Selectivity

AM/FM: 6 dB <§ 3 KHz, 50 dB @ 9 KHz.


SSB: 6 dB @ 2.1 KHz, 60 dB @ 3.3 KHz.

Image Rejection

More than 45 dB.

IF Frequency

10.695 MHz 1st IF, 455 KHz 2nd IF.

Adjacent-Channel Rejection

60 dB

RF Gain Control

30 dB adjustable for optimum signal reception.

Automatic Gain Control

Less than 10 dB change in audio output for inputs

(AGO

from 10 to 10.000 microvolts.

Squelch

Adjustable: threshold less than 0.5 uV.

ANL

Switchable.

Noise Blanker

RF type, effective on AM/FM and SSB

Clarifier Range

Coarse (TX/RX) more than ±10 KHz


Fine (RX) more than ±1 KHz

Audio Output Power

4 watts into 8 ohms.

Frequency Response

300 to 2800 Hz.

Built-in Speaker

8 ohms, round.

External Speaker

8 ohms; disables internal speaker when connected.

(Not Supplied)



RECEIVING SSB SIGNALS

There are four types of signals presently used for communications in the Citizens Band: AM, FM, USB, and LSB. When the MODE switch on your unit is placed in the AM position, only standard double-sideband and in FM position, only frequency deviation, full carrier signals will be detected. An SSB signal may be recognized while in the AM or FM mode by its characteristic "Donald Duck" sound and the inability of the AM or FM detector to produce an intel­ligible output. The USB and LSB modes will detect upper sideband and lower sideband respectively, and standard AM signals.

SSB reception differs from standard AM reception in that SSB receiver does not require a carrier or opposite sideband to produce an intelligible signal. A single-sideband transmitted signal consists only of the upper or the lower side­band and no carrier is transmitted. The elimination of the carrier from the AM signal helps to eliminate the biggest cause of whistles and tones heard on chan­nels which make even moderately strong AM signals unreadable. Also; SSB takes only half of an AM channel, therefore two SSB conversations will fit into each channel, expanding the 280 AM channels to 560 SSB channels. The reduction in channel space required also helps in the receiver because only half of the noise and interference can be received with 100% of the SSB signal.

An SSB signal may be received only when the listening receiver is functioning in the same mode. In other words, an upper sideband signal (USB) may be made intelligible only if the receiver is functioning in the USB position.

If a lower sideband (LSB) signal is heard when the receiver is in the USB mode, no amount of tuning will make the signal intelligible. The reason for this may be understood if you consider that when modulation is applied tc the transmitter's microphone in the USB mode, the transmitter's output frequency is increased whereas in the LSB mode the transmitter's output frequency is de­creased. The result in listening to the receiver is that when the MODE switch is in the proper position (either USB or LSB), a true reproduction of single tone of modulation will result, and if the tone is increased in frequency (such as a low-pitched whistle a high-pitched whistle) you will hear the increase in the output tone of the receiver. If the incorrect mode is selected, an increase in tone of a whistle applied to the transmitter will cause a decrease in the resultant tone from the receiver.

Thus when a voice is used in place of a whistle or tone, in the proper listening mode the voice will be received correctly whereas in the incorrect mode, the voice will be translated backwards and cannot be made intelligible by the voice lock control. When listening to an AM transmission, a correct sideband is heard in either mode since both upper and lower sideband are received.

Once the desired SSB mode has been selected, frequency adjustment may be necessary in order to make the incoming signal intelligible, the CLARIFIER control allows the operator to vary frequency above and below the exact-center frequency of the received signal. If the sound of the incoming signal is high or low pitched, adjust the operation of the CLARIFIER. Consider it as performing the same function as a phonograph speed control. When the speed is set to high, voices will be high-pitched and if set too low, voices will be low-pitched. Also, there is only one correct speed that will make a particular record produce the same sound that was recorded. If the record is played on a turntable that rotated in the wrong direction (opposite sideband) no amount of speed control (CLARIFIER) will produce an intelligible sound.

An AM signal received while listening in one of the SSB modes will produce a steady tone (carrier) in addition to the intelligence, unless the SSB receiver is tuned to exactly the same frequency by the CLARIFIER control. For simplicity it is recommended that the AM modes be used to listen to AM signals.

SS-7000DX OWNER'S MANUAL

SS-7000DX Schematic Diagram

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