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SS-3900EGHP
TABLE OF
CONTENTS
PAGE
CHAPTER 1
SPECIFICATIONS
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
1.1
Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
1.2
Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
CHAPTER 2
OPERATION
2.0
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
2.1
Control & Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
2.1.1
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
2.1.2
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
2.2
Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
2.3
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
2.3.1
Procedure To Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
2.3.2
Procedure To Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
2.4
Alternate Microphones And Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
CHAPTER 3
CIRCUIT DESCRIPTION
3.0
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
3.1
PLL Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
3.2
Receiver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
3.3
Transmitter Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
3.4
Transmitter Amplifier Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
CHAPTER 4
ALIGNMENT
4.0
Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
4.1
Alignment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
4.1.1
PLL Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
4.1.2
Transmitter Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
4.1.3
Receiver Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
CHAPTER 5
MAINTENANCE
5.0
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
5.1
Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
5.2
Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
CHAPTER 6
DIAGRAMS AND PART LIST
6.0
PCB Layout & Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
1.0
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SS-3900EGHP
CHAPTER 1
SPECIFICATIONS
1.0 GENERAL
Model
SS-3900EGHP
Frequency Range
10 Meter: 28.015 ~ 28.465MHz
Emission Modes
AM(A3)/FM(F3)/LSB,USB(A3J)/CW(A1)
Frequency Control
Phase Lock Loop (PLL) synthesizer
Frequency Tolerance
± 0.005 %
Frequency Stability
± 0.001 %
Operating Temperature Range
-30°C to +50°C
Microphone
Plug-in (4 pin), Dynamic PTT, 500 Ω
Meter Function
Meter shows relative signal strength, RF output power
and SWR level.
Input Voltage
13.8V DC nominal ±15%
Transmit Current Drain:
AM Full Mod.
< 5A
Receive Current Drain:
Squelched
Max. Audio Output
< 0.6A
< 1.2A
Antenna Connector
UHF, SO239
Dimensions
7-7/8”(W) x 10-3/4”(D) x 2-3/8”(H)
Weight
5 lb.
1.1 TRANSMITTER
RF Power Output
AM/FM/CW: 9W RMS ; SSB: 25W PEP
RF Transmit Modes
AM/FM/SSB/CW
Modulation
A3E/16F3/J3E/A1A
Harmonics And Spurious Emissions
> -50 dB
Carrier Suppression
> -35 dB
Audio Frequency Response
300 to 2500 Hz
Antenna Impedance
50 Ohms
1.2 RECEIVER
Sensitivity
AM: < 1.0 µV For 10dB S+N/N
FM: < 0.5 µV For 12dB S+N/N
SSB/CW: < 0.5 µV For 10dB S+N/N
Intermediate Frequency
10.695 MHz (AM-1 st , SSB), 455 KHz (AM-2 nd )
Image Rejection
> 50 dB
Adjacent Channel Selectivity
> 60 dB
RF Gain Control
45 dB adjustable for optimum signal reception
Automatic Gain Control (AGC) Figure Of Merit
>70 dB for 50 mV for 10 dB Change in Audio Output
Squelch
Adjustable; threshold less than 0.5 µV
Noise Blanker
RF type
Audio Output Power
2.5W @ 10% THD
Audio Frequency Response
300 to 2500 Hz
Built-in Speaker
8 Ohms, 4 Watts
External Speaker (Not Supplied)
8 Ohms, 4 Watts
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)
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SS-3900EGHP
CHAPTER 2
OPERATION
Figure 2-1 Front Panel
2.0 INTRODUCTION
This section explains the basic operating procedures for the SS-3900EGHP Amateur 10 meter mobile
transceiver.
2.1 CONTROL AND CONNECTIONS
2.1.1 FRONT PANEL
Refer to the above Figure 2-1 for the location of the following controls.
1. ON/OFF VOLUME CONTROL
This knob controls the volume and power to the radio. To turn radio on, rotate the knob clockwise.
Turning the knob further will increase the volume of the receiver.
2. SQUELCH CONTROL
This knob is used to eliminate background noise being heard through the receiver, which can be
disturbing when no transmissions are being heard through the receiver. To use this feature, turn the
knob fully counterclockwise and then turn clockwise slowly until the background noise is just
eliminated. Further clockwise rotation will increase the threshold level which a signal must overcome
in order to be heard. Only strong signals will be heard at a maximum clockwise setting.
3. MIC GAIN CONTROL
Adjusts the microphone gain in the transmit modes. This controls the gain to the extent that full talk
power is available several inches away from the microphone.
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309564127.008.png 309564127.001.png 309564127.002.png
4. RF GAIN CONTROL
This control is used to reduce the gain of the RF amplifier under strong signal conditions.
5. ECHO/TIME CONTROL
This control is used to control the echo effects.
6. BAND SELECTOR
This switch is used to select the band.
7. MODE SWITCH
This switch allows you to select one of following operating modes: CW/FM/AM/LSB/USB.
8. COARSE/FINE CONTROL
Allows tuning of the receive or transmit frequency above or below the channel frequency. Although
this control is intended primarily to tune in SSB/CW signals, it may be used to optimize AM/FM
signals as described in the Operating Procedure paragraphs. Coarse operates both TX/RX but Fine only
in RX.
9. CHANNEL SELECTOR
This control is used to select the desired transmit and receive channel.
10. FRONT PANEL METER
The front panel meter allows the user to monitor signal strength, RF output power and SWR level.
11. RF POWER H/M/L SWITCH
This switch allows the user to select HI, MID or LO RF power output.
12. NB-ANL/OFF SWITCH
When the switch is place in the NB/ANL position, the Automatic Noise Limiter (ANL) in the audio
circuits and the RF Noise Blanker (NB) is also activated. The RF Noise Blanker is very effective in
eliminating repetitive impulse noise such as ignition interference.
13. S-RF/SWR SWITCH
In the S-RF position, the meter swings proportionally to the strength of the received signal. When
transmitting, the meter indicates relative RF output power. When in the SWR position, the Standing
Wave Ratio (SWR) of your antenna. There are no adjustment because the SWR circuit in this radio
calibrates itself automatically.
14. TALKBACK (TB) SWITCH
This switch is used to monitor the sound feedback effects.
15. RX/TX LED
The red LED indicates the unit is in the transmit mode. The green LED indicates the unit is in the
receive mode.
16. CHANNEL DISPLAY
The channel display indicates the current selected channel.
2.1.2 REAR PANEL
- 3 -
Figure 2-2 represents the location of the following connections:
Figure 2-2 Rear Panel
1. ANTENNA
This jack accepts a 50 ohms coaxial cable with a PL-259 style plug.
2. POWER
This accepts 13.8 VDC power cable with built-in fuse. The power cord provided with the radio has a
black and red wire. The black goes to negative and the red goes to positive.
3. F.C.
This connector is used for an external frequency counter which indicates the frequency of the selected
channel.
4. CW KEY
The CW key is used for Morse Code operation. To operate this mode, connect a CW key to this jack,
and place the MODE switch in the CW position.
5. EXTERNAL SPEAKER
This jack accepts a 4 - 8 ohm, 5watt external speaker. When the external speaker is connected to this
jack, the built-in speaker will be disabled.
2.2 MICROPHONE
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