Ranger RCI-6900F HP, RCI-6900F TB User Guide
RCI-6900F HP
RCI-6900F TB
CHAPTER 1
SPECIFICATIONS
1.0 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.2 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
TABLE OF
CONTENTS
PAGE
CHAPTER 2
OPERATION
2.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1 Control & Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.1.2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1.3 Frequency Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3.1 Procedure To Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3.2 Procedure To Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 7
2.4 Alternate Microphones And Installation . . . . . . . . . . . . . . . . . . . . . . . . 8
CHAPTER 3
CIRCUIT DESCRIPTION
3.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
3.1 PLL Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Receiver Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Transmitter Modulation Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Transmitter Amplifier Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9
9
9
CHAPTER 4
ALIGNMENT
4.0 Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1 Alignment Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.1 PLL Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.2 Transmitter Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.1.3 Receiver Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
14
15
16
CHAPTER 5
MAINTENANCE
5.0 Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.1 Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.2 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CHAPTER 6
DIAGRAMS AND PART LIST
6.0 PCB Layout & Part List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 20
RCI-6900F HP
RCI-6900F TB
SPECIFICATIONS
19
CHAPTER 1
- 1 -
1.0 GENERAL
Model RCI-6900F HP / RCI-6900F TB
Frequency Range 28.245 - 29.655MHz.
Emission Modes CW/FM/AM/SSB (A1/F3/A3/A3J)
Frequency Control Phase Lock Loop (PLL) synthesizer.
Frequency Tolerance
Frequency Stability
Operating Temperature Range
Microphone Dynamic PTT, 500 Ω
Input Voltage 13.8V DC
Current Drain: Transmit (AM full mod.) RCI-6900F HP < 5A; RCI-6900F TB < 15A.
Current Drain : Receiver (Squelched)
(Max. audio output) < 0.5A.
Antenna Connector UHF, SO239.
Dimensions : (RCI-6900F HP) 7 7/8”(W) x 10 3/4” (D) x 2 3/8”(H)
: (RCI-6900F TB) 7 7/8” (W) x 9 1/4” (D) x 3 7/8” (H)
Weight 5 lb. (RCI-6900F HP), 7lb 6 oz (RCI-6900F TB)
1.1 TRANSMITTER
AM/FM/CW ; SSB RF Power Output (RCI-6900FHP)
AM/FM/CW ; SSB RF Power Output (RCI-6900FTB)
RF Transmit Modes CW/FM/AM/SSB.
Modulation High and low level Class B, Amplitude Modulation.
Spurious Emissions -50 dB.
Carrier Suppression -35 dB.
Audio Frequency Response 300 to 2500 Hz
Antenna Impedance 50 Ohms.
Output Indicators Meter shows relative RF output power, receive signal
1.2 RECEIVER
Sensitivity For 10dB S/N (AM ; CW/SSB)
Sensitivity For 20dB S/N (FM)
IF Frequency AM: 10.695 MHz 1st IF, 455 KHz 2nd IF.
Image Rejection > 50 dB.
Adjacent Channel Selectivity > -55 dB (AM/FM) ; > -60 dB (CW/SSB)
RF Gain Control 45 dB adjustable for optimum signal reception.
Automatic Gain Control (AGC) Figure Of Merit 100 mV for 10 dB Change in Audio Output.
Squelch
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.
RCI-6900F HP
RCI-6900F TB
± 0.005 %.
± 0.001 %.
-30°C to +50°C.
≤ 0.25A.
10W ; 25W PEP
50W ; 100W PEP
and SWR. Transmit LED glows red when transmitter
is in operation.
< 0.5 µV ; < 0.25 µV.
< 0.5 µV.
Adjustable; threshold less than 0.5 µV.
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)
CHAPTER 2
OPERATION
- 2 -
Figure 2-1 Front Panel
2.0 INTRODUCTION
This section explains the basic operating procedures for the RANGER RCI-6900F HP / RCI-6900F TB
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 the power to the radio. To turn the radio on, rotate the knob
clockwise. Turning the knob further will increase the volume of the receiver.
2. SQUELCH CONTROL
This switch is used to eliminate background noise being heard through the receiver which can be
disturbing when no transmissions are being received. To use this feature of your radio, gently turn the
switch fully counterclockwise, and then turn clockwise until the background noise is just eliminated.
Further clockwise rotation will increase the threshold level and only strong signals will be heard.
3. MIC GAIN CONTROL
Adjusts the microphone gain in the transmit mode. This control adjusts the gain to the extent that full
talk power is available several inches away from the microphone.
4. RF GAIN CONTROL
This control is used to reduce the gain of the RF amplifier under strong signal conditions.
5. TALKBACK CONTROL
Adjust this knob for desired volume of Talkback. This is used to monitor your own voice. For example,
you could use this feature to compare different microphones.
6. RF POWER CONTROL
This control allows the user to adjust RF power output.
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7. FR. POOL SELECTOR
This switch is used to select the frequency range of operation (1 - 6).
8. MODE SWITCH
This control allows you to select one of the following operating modes: CW/FM/AM/USB/LSB.
9. FINE/COARSE CONTROL
Allows variation of the receiver operating frequency above and below the assigned frequency.
Although this control is intended primarily to tune in SSB signal, it may be used to optimize AM/FM
signals as described in the operating procedure paragraphs. Coarse operates both TX/RX, Fine operate
in RX only.
10. CHANNEL SELECTOR
This control is used to select a desired transmit and receive channel.
11. FRONT PANEL METER
The Front Panel Meter allows the user to monitor signal strength, RF output power and SWR level.
12. TX/RX LED
The red LED indicates the unit is in the transmit mode. The green LED indicates the unit is in the
receive mode.
13. FREQUENCY COUNTER
This display indicates the frequency of operations.
14. ECHO/OFF SWITCH
This control is used for echo effect.
15. HI/LO SWITCH
This switch changes tone quality in receive only. In LO position, bass is increased and in HI position,
treble is increased.
16. S-RF/SWR SWITCH
This is a two-function switch. In the S-RF position, the meter will indicate the strength of the signal
being received, as well as the relative RF output of transmission. To use the meter to measure the
standing wave ratio, turn the switch to the SWR position.
17. NB/ANL/OFF SWITCH
In the NB/ANL position, the RF Noise Blanker and the Automatic Noise Limiter in the audio circuits
are also activated. The Noise Blanker is very effective in eliminating repetitive impulse noise such as
ignition interference.
18. R.B./OFF SWITCH
In the Roger Beep position, the radio transmits an audio tone at the end of your transmission to indicate
that transmission has ended. As a courtesy to others, use the Roger Beep only when necessary.
19. +10KHz/OFF SWITCH
When the switch is pressed the frequency is shifted 10KHz up.
20. CHANNEL DISPLAY
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The channel display indicates the current selected channel.
2.1.2 REAR PANEL
Figure 2-2 represents the location of the following connections:
Figure 2-2 Rear Panel
1. ANTENNA
This jack accepts 50 ohms coaxial cable with a PL-259 type plug.
2. POWER
This connector accepts 13.8V DC 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. CW. KEY
This 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.
4. EXT. SP.
This jack accepts 4 to 8 ohms, 4 watts external speaker. When the external speaker is connected to this
jack, the built-in speaker will be disabled.
2.1.3 FREQUENCY CHART
FR. POOL
CHANNEL 1 (MHz) 2 (MHz) 3 (MHz) 4 (MHz) 5 (MHz) 6 (MHz)
1 28.245 28.695 29.145 28.315 28.765 29.215
2 28.255 28.705 29.155 28.325 28.775 29.225
3 28.265 28.715 29.165 28.335 28.785 29.235
4 28.285 28.735 29.185 28.355 28.805 29.255
5 28.295 28.745 29.195 28.365 28.815 29.265
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6 28.305 28.755 29.205 28.375 28.825 29.275
7 28.315 28.765 29.215 28.385 28.835 29.285
8 28.335 28.785 29.235 28.405 28.855 29.305
9 28.345 28.795 29.245 28.415 28.865 29.315
10 28.355 28.805 29.255 28.425 28.875 29.325
11 28.365 28.815 29.265 28.435 28.885 29.335
12 28.385 28.835 29.285 28.455 28.905 29.355
13 28.395 28.845 29.295 28.465 28.915 29.365
14 28.405 28.855 29.305 28.475 28.925 29.375
15 28.415 28.865 29.315 28.485 28.935 29.385
16 28.435 28.885 29.335 28.505 28.955 29.405
17 28.445 28.895 29.345 28.515 28.965 29.415
18 28.455 28.905 29.355 28.525 28.975 29.425
19 28.465 28.915 29.365 28.535 28.985 29.435
20 28.485 28.935 29.385 28.555 29.005 29.445
21 28.495 28.945 29.395 28.565 29.015 29.465
22 28.505 28.955 29.405 28.575 29.025 29.475
23 28.535 28.985 29.435 28.605 29.005 29.505
24 28.515 28.965 29.415 28.585 29.035 29.485
25 28.525 28.975 29.425 28.595 29.045 29.495
26 28.545 28.995 29.445 28.615 29.065 29.495
27 28.555 29.005 29.455 28.625 29.075 29.515
28 28.565 29.015 29.465 28.635 29.085 29.525
29 28.575 29.025 29.475 28.645 29.095 29.535
30 28.585 29.035 29.485 28.655 29.105 29.545
31 28.595 29.045 29.495 28.665 29.115 29.555
32 28.605 29.055 29.505 28.675 29.125 29.565
33 28.615 29.065 29.515 28.685 29.135 29.575
34 28.625 29.075 29.525 28.695 29.145 29.585
35 28.635 29.085 29.535 28.705 29.155 29.595
36 28.645 29.095 29.545 28.715 29.165 29.605
37 28.655 29.105 29.555 28.725 29.175 29.625
38 28.665 29.115 29.565 28.735 29.185 29.635
39 28.675 29.125 29.575 28.745 29.195 29.645
40 28.685 29.135 29.585 28.755 29.205 29.655
2.2 MICROPHONE
The receiver and transmitter are controlled by the push-to-talk switch on the microphone. Press the
switch and the transmitter is activated, release switch to receive. When transmitting, hold the
microphone two inches from the mouth and speak clearly in a normal voice. The radio comes complete
with a low impedance (500 ohm) dynamic microphone.
2.3 OPERATION
2.3.1 PROCEDURE TO RECEIVE
1. Be sure that power source, microphone and antenna are connected to the proper connectors before
going to the next step.
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2. Turn
VOL.
knob clockwise to apply power to the radio.
3. Set the
VOL.
to a comfortable listening level.
4. Set the
MODE
switch to the desired mode.
5. Listen to the background noise from the speaker. Turn the SQ knob slowly clockwise until the noise
just disappears. The SQ is now properly adjusted. The receiver will remain quiet until a signal is
actually received. Do not advance the control too far or some of weaker signals will not be heard.
6. Set the
CHANNEL
selector switch to the desired channel.
7. Set the
RF GAIN
control fully clockwise for maximum receive gain.
8. Adjust the
FINE/COARSE
control to clarify the SSB signals or to optimize AM/FM signals.
2.3.2 PROCEDURE TO TRANSMIT
1. Select the desired channel of transmission
2. Set the
MIC GAIN
control fully clockwise.
3. If the channel is clear, depress the push-to-talk switch on the microphone and speak in a normal
voice.
2.4 ALTERNATE MICROPHONES AND INSTALLATION
For best results, the user should select a low impedance dynamic type microphone or a transistorized
microphone. Transistorized type microphones have a low output impedance characteristic. The
microphones must be provided with a four-lead cable. The audio conductor and its shielded lead
comprise two of the leads. The third lead is for transmit control and the fourth is for receiving control.
The microphone should provide the functions shown in schematic below (Figure 2-3).
4 WIRE MIC CABLE
Pin Number Mic Cable Lead
1 Audio Shield
2 Audio Lead
3 Transmit Control
- 7 -
4 Receive Control
Figure 2-5 Microphone plugs pins numbers viewed from rear of pin receptacle.
RCI-6900F HP
Figure 2-3 Your Transceiver Microphone Schematic
CHAPTER 3
CIRCUIT
RCI-6900F TB
DESCRIPTION
3.0 INTRODUCTION
This section explains the technical theory of operation for the RCI-6900F HP / RCI-6900F TB mobile
transceiver.
3.1 PLL CIRCUIT
The Phase Lock Loop (PLL) circuit is responsible for developing the receiver’s first local oscillator
signal and the transmitter’s exciter signal. The PLL circuit consists primarily of IC2, IC3, IC4, IC5
- 8 -
Q25, Q27, Q28, Q29 and Q61. The PLL circuit is programmed by the rotary channel switch GPS-0501.
The GPS-0501 communicates the correct binary data information to the programmable divider inside
of IC3. IC3 then controls the VCO (Voltage Controlled Oscillator), to oscillate on the correct
frequency. This signal is fed either into the receiver’s first mixer (for receive operation) or the
transmitter’s mixer (for transmit operation).
3.2 RECEIVER CIRCUIT
The incoming RF signal comes into the radio via the antenna and into the front-end pre-amp, Q17. The
RF signal is fed into the mixer circuit of the Q18 & Q19 and then into the AM IF section of the
receiver (depending on the mode of operation). The signal is then detected by either the AM detector or
product detector or then fed to the audio amplifier section of the receiver and finally out to the speaker.
3.3 TRANSMITTER MODULATION CIRCUIT
(i) The transmitter modulation circuit modulates the low-level RF signal from the PLL exciter circuit
with the user’s audio voice signal from the microphone. The audio from the microphone is then
amplified and fed into the transmit amplifier circuit.
(ii) If the transceiver is in the AM mode, the AF Power amplifier modulates the last RF amplifier,
which produces a true amplitude modulated RF signal.
3.4 TRANSMITTER AMPLIFIER CIRCUIT
The transmitter takes the basic exciter signal from the TX mixer and amplifies it through a series of
amplifiers consisting of Q50, Q51, Q49, Q47, Q48 and EPA010010B (only for RCI-6900F TB) where
it is sent out to the antenna connector.
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RCI-6900F HP / RCI-6900F TB FREQUENCY COUNTER CIRCUIT DIAGRAM
- 12 -
RCI-6900F HP / RCI-6900F TB ECHO BOARD (EB-99) CIRCUIT DIAGRAM
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