ICOM IC-3PS - Empfänger

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📄 27 Seiten Deutsch DE Herunterladen 💬 KI-Frage 10 Fragen ⚙️ Technik
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Produkttyp Netzteil / Lautsprecherständer für tragbare Transceiver
Marke ICOM
Modell IC-3PS
Abmessungen (H × B × T) 188 mm × 122 mm × 150 mm
Gewicht ca. 2,3 kg
Eingangsspannung 117 V oder 240 V AC, 50/60 Hz
Ausgangsspannung 13,8 V DC, negative Masse
Maximaler Ausgangsstrom 3 A (Dauerbetrieb)
Schutzschaltung Ansprechstrom 4,5 A ±10 %
Restwelligkeit weniger als 10 mV bei 3 A Last
Spannungsregelung ±3 % bei Nenneingangsspannung ±10 %; weniger als −3 % bei 3 A Last
Funktionen Externes Netzteil, Lautsprecher, Standfuß, Aufnahme für Linearverstärker (IC-50L, IC-20L, IC-30L)
Anschlüsse Netzeingang, Lautsprecherausgang, externer Stromausgang (13,8 V)
Lieferumfang Netzkabel, Lautsprecherkabel, Netzstecker, Sicherungen (1 A für 240 V, 2 A für 117 V), Gummifüße
Sicherheit Überstromschutz (automatische Abschaltung bei Kurzschluss)
Wartung Keine besondere Wartung erforderlich; Sicherungen bei Bedarf ersetzen
Ersatzteile Sicherungen (1 A und 2 A) als Zubehör erhältlich

Häufig gestellte Fragen - IC-3PS ICOM

Wie schließe ich den Transceiver an das IC-3PS an?
Verbinden Sie die externe Strombuchse des Transceivers mit der Stromausgangsbuchse des IC-3PS über das mitgelieferte Stromverbindungskabel. Schalten Sie vor dem Anschließen sowohl das Netzteil als auch den Transceiver aus.
Kann ich das IC-3PS als externen Lautsprecher nutzen?
Ja, verbinden Sie die externe Lautsprecherbuchse (EXT SP) des Transceivers mit dem Lautsprechereingang des IC-3PS über das mitgelieferte Lautsprecherkabel. Achten Sie darauf, den Transceiver vor dem Anschließen auszuschalten.
Welche Linearverstärker sind mit dem IC-3PS kompatibel?
Das IC-3PS ist für die Aufnahme der ICOM Linearverstärker IC-50L (50 MHz), IC-20L (144 MHz) und IC-30L (430 MHz) ausgelegt.
Was bedeutet die APC-LED am Linearverstärker?
Die APC-LED leuchtet, wenn die Antennenanpassung schlecht ist (hohes SWR) oder die Antenne kurzgeschlossen/offen ist. Der Verstärker schaltet dann in den Direktmodus, um die Endstufe zu schützen. Überprüfen Sie Antenne und Zuleitung.
Kann ich das IC-3PS auch ohne Linearverstärker verwenden?
Ja, das IC-3PS fungiert auch ohne Linearverstärker als Netzteil und Lautsprecherstand für den Transceiver.
Welche Spannung und Strom liefert das IC-3PS?
Es liefert eine geregelte Gleichspannung von 13,8 V DC bei maximal 3 A Dauerstrom.
Wie tausche ich die Sicherung im IC-3PS?
Schalten Sie das Gerät aus und ziehen Sie den Netzstecker. Entfernen Sie die Abdeckung des Sicherungshalters und ersetzen Sie die Sicherung durch eine gleiche: 1 A für 240 V, 2 A für 117 V.
Kann ich das IC-3PS im Auto verwenden?
Das IC-3PS ist für den Netzbetrieb ausgelegt. Für den Mobilbetrieb verwenden Sie stattdessen eine externe 13,8-V-Stromversorgung und den Linearverstärker mit optionalem Montagesatz.
Warum leuchtet die Betriebsanzeige des IC-3PS nicht?
Überprüfen Sie die Netzverbindung, die Sicherung und ob die Stecker kurzgeschlossen sind. Ein Kurzschluss aktiviert den Überstromschutz und reduziert die Ausgangsspannung auf 0 V.
Ist das IC-3PS für den Dauerbetrieb geeignet?
Ja, es ist für Dauerbetrieb bei maximal 3 A Last ausgelegt. Der große Kühlkörper sorgt für ausreichende Wärmeableitung.

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BEDIENUNGSANLEITUNG IC-3PS ICOM

INSTRUCTION MANUAL

AC POWER SUPPLY

IC-3PS

50MHz 10W LINEAR AMPLIFIER

IC-50L

144MHz 10W LINEAR AMPLIFIER

IC-20L

430MHz 10W LINEAR AMPLIFIER

IC-30L

ICOM IC-3PS - INSTRUCTION MANUAL - 1

ICOM

TABLE OF CONTENTS

PROFILE 2

SPECIFICATIONS 4

ACCESSORIES. 6

PARTS DESIGNATION (IC-3PS)....7

HOW TO USE THE IC-3PS 8

PARTS DESIGNATION (IC-50L, IC-20L, IC-30L).... 11

THEORY OF OPERATION.... 17

SCHEMATIC DIAGRAM.... 20

OPTIONS 24

Congratulations on the purchase of this ICOM product. This instruction manual collectively gives descriptions of the IC-3PS Power Supply and IC-50L, IC-20L, and IC-30L Linear Amplifiers, to provide the information you need when using them. Please read these instructions carefully to receive full value and maximum performance of the set.

ICOM IC-3PS - TABLE OF CONTENTS - 1

natural_image Black-and-white photo of a vintage electronic device with control panel and microphone, no visible text or symbols on the device itself.

PROFILE

IC-3PS

The IC-3PS is an AC power supply/speaker stand to hold the IC-3PU AC power supply and the linear amplifier (IC-50L, IC-20L, IC-30L) inside and to power the portable transceiver (IC-502, IC-202, IC-215/E, IC-202E, IC-202S, and the IC-402) providing a convenient fixed station. It supplies a regulated DC voltage of 13.8 Volts from an AC 117 or 240V source to the portable transceiver as an external power source, and also serves as a stand for the transceiver, a mount case for the linear amplifier, and an external speaker.

IC-50L, IC-20L, IC-30L

The linear amplifier is connected to the portable transceiver and increases its output from 3 Watts to 10 Watts.

SMALL SIZE, LIGHT WEIGHT

Because of it's small size and light weight, the amplifier can be mounted easily in a small space in the IC-3PS or in a car.

The DC voltage for T/R switching control is superimposed on the RF coaxial cable. This permits the amplifier to be controlled by only connecting the coaxial cable from the transceiver. Unlike the carrier control method, no cutoff of the initial transmission occurs.

POWER CONNECTOR SOCKET

As a power connector socket is provided, only one power cord is necessary for battery or external power connections. This provides neat wiring when mounted in a car.

LARGE SIZED HEAT SINK

The large sized extruded aluminum heat sink provides excellent heat dissipation to maintain a stabilized output during long periods of operation.

APC CIRCUIT

When the antenna circuit is open or shorted or when the SWR is extremely high, the APC circuit works to inactivate the linear amplifier to protect the final stage transistor.

DIRECT CIRCUIT

When the power switch of the linear amplifier is turned to the DIRECT (OFF) position, the amplifier circuit is bypassed and the 3 Watt output of the transceiver is fed directly to the antenna.

SPECIFICATIONS

IC-3PS AC POWER SUPPLYIC-50L 50MHz LINEAR AMPLIFIER
Number of SemiconductorTransistors 4Diodes 5Number of SemiconductorTransistors 6Diodes 11
Rated Input Voltage117V or 240V AC 50/60HzFrequency Coverage50 ~ 51MHz
Input Voltage ToleranceWithin ±10% of the rated input voltageAcceptable ModulationPower Supply RequirementsSSB · CW · AM · FM13,8V DC ±15%
Output Voltage13.8V DC Negative GroundedNegative Ground 3A Max.
Output Voltage RegulationWithin ±3% even with the rated input voltage ±10%Less than -3% with 3A load at rated input voltageCurrent DrainApprox 1.7A at CW 10WOutputApprox 15mA at Stand by 3 Watts P.E.P.
Ripple VoltageLess than 10mV with 3A' load at rated input voltageDrive Power RequirementsOutput PowerInput Impedance10 Watts P.E.P.50Ω Unbalanced
Maximum Load Current3A (Continuous Duty)Output (Load) ImpedanceDimensions50Ω Unbalanced49mm(H) x 102mm(W) x 141mm(D)
Protection Circuit Operating
Current4.5A ±10%
Dimensions188mm(H) x 122mm(W) x 150mm(D)WeightAccessoriesApprox 0.8kgPower Cord....1
WeightApprox. 2.3kgPower Connector Cord(2P-2P)....1
AccessoriesSpeaker Cord....1Power Plug....1Fuse (1A/2A)....2Rubber Fixing Base....1Coaxial Cable....1Fuse (5A)....2

IC-20L 144MHz LINEAR AMPLIFIER

Number of SemiconductorsTransistors 6Diodes 11
Frequency Coverage144~146MHz
Acceptable ModulationSSB·CW·AM·FM
Power Supply Requirements13.8V DC ±15%Negative Ground 3A Max.
Current DrainApprox. 1.8A at CW 10WOutputApprox. 15mA at stand by
Drive Power Requirements3 Watts P.E.P.
Output Power10 Watts P.E.P.
Input Impedance50Ω Unbalanced
Output (Load) Impedance50Ω Unbalanced
Dimensions49mm(H) x 102mm(W) x 141mm(D)
WeightApprox 0.8kg
AccessoriesPower Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Connector Cord(2P-2P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . (3P-2P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Coaxial Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuse (5A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IC-30L 430MHz LINEAR AMPLIFIER

Number of SemiconductorsTransistors7
Diodes9
IC1
Frequency Coverage430~435.2MHz
Acceptable ModulationSSB·CW·AM·FM
Power Supply Requirements13.8V DC ±15%
Negative Ground 3A Max.
Current DrainApprox. 1.8A at CW 10W Output
Approx. 25mA at stand by
Drive Power Requirements3 Watts P.E.P.
Output Power10 Watts P.E.P.
Input Impedance50Ω Unbalanced
Output (Load) Impedance50Ω Unbalanced
Dimensions49mm(H) x 102mm(W) x 141mm(D)
WeightApprox 0.8kg
AccessoriesPower Cord . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Connector Cord (3P-2P) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
Coaxial Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Fuse (5A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ACCESSORIES

IC-3PS
ICOM IC-3PS - ACCESSORIES - 1

natural_image Product diagram showing a black rectangular device with four labeled parts: two connected cables and three small accessories (no text or symbols present)
  • IC-50L · IC-20L · IC-30L
    ICOM IC-3PS - ACCESSORIES - 2

① Speaker Cord
② Power Plug
③ Fuses (1A for 240V, 2A for 117V)
④ Rubber Fixing Base

① Power Cord
② Power Connector Cord (2P - 2P) (Not include for IC-30L)
③ Power Connector Cord (3P - 2P) (Not include for IC-50L)
④ Coaxial Cable
⑤ Fuses (5A)

PARTS DESIGNATION (IC-3PS)

FRONT SIDE
Front Panel Power Indicator LED Power Switch Speaker Input Jack Speaker Rack

REAR SIDE

Fixing Plate Power Output Jack for a Transceiver Power Output Jack for a Linear Amplifier Heat Sink of Power Supply Regulator AC Power Cord Fuse Holder Fixing Screw of Power Supply

*Remove the protective sheet attached to the front panel before use.

HOW TO USE THE IC-3PS

WHEN USED AS A TRANSCEIVER STAND

① TO ATTACH THE TRANSCEIVER TO THE RIGHT SIDE

Pull out the rack on the right side of the IC-3PS to its full span and place the transceiver in between the rack and the IC-3PS.

② TO ATTACH THE TRANSCEIVER TO THE LEFT SIDE

Detach the rack by loosening the two screws holding the rack holder and transfer the rack and holder to the left side. As tapped holes are also provided on the left side, attach the rack there by securing it with the screws. Then pull out the rack and install the transceiver as before.

Since the speaker of the transceiver faces the side of the IC-3PS in this case, use the speaker of the IC-3PS (see page 9).

ICOM IC-3PS - ② TO ATTACH THE TRANSCEIVER TO THE LEFT SIDE - 1

natural_image Black industrial electronic device with no visible text or symbols on its body

ICOM IC-3PS - ② TO ATTACH THE TRANSCEIVER TO THE LEFT SIDE - 2

natural_image Black industrial electronic device with internal components, no visible text or symbols

FIXING THE TRANSCEIVER TO THE IC-3PS

A rubber base is provided to prevent the transceiver from sliding back and forth when attached to the IC-3PS. Fix the transceiver, as shown in the following drawing, with its recess on the bottom fitted into the convex of the rubber base and the recess of the base fitted to the rack.

Rack Rubber Fixing Base

WHEN USED AS AN EXTERNAL SPEAKER

Since the speaker of the transceiver is on the side plate, use the external speaker of the IC-3PS. Connect the external Speaker jack (EXT SP) of the transceiver and the Speaker Input jack of the IC-3PS with the accessory speaker cord.

CAUTION: Be sure to switch OFF the power supply to the transceiver before connecting the speaker cord. If connected with the power supply turned ON, damage may be caused to the audio IC of the transceiver.

WHEN USED AS AN AC POWER SOURCE

Connecting the power output jack of the IC-3PS to the external power jack of the transceiver with the accessory power connector cord, after turning OFF the respective Power switch and Function switch.

CAUTION: The accessories of the IC-20L include a power connector cord (3P - 2P). When you want to use the IC-3PS in combination with the IC-202S transceiver, use this power connector cord.

In case you already have an IC-20L and purchase an IC-202S, a power connector cord (3P - 2P) will be necessary. This is available as an option from your ICOM distributor/dealer. (Code name: OPC-003, length: 35cm).

OPERATION

Plug the AC power cord into a 117 or 240 Volt AC outlet and turn ON the power switch of the IC-3PS. This will light the red power indicator LED. Then turn ON the function switch of the transceiver. This will apply power to the transceiver and light its power indicator LED.

If the transceiver fails to be powered when the indicator of the IC-3PS is lit, turn OFF both the power switches and check for defective contacts of the plugs, jacks, etc. and for broken cord wires. Correct the problem, then turn ON the switches again.

If the power indicator LED of the IC-3PS fails to light when the power switch is turned ON, turn OFF the switch and check for sported plugs. Remove the short, then turn ON the switch again. (If the plugs short, an automatic Protection circuit inside the IC-3PU is activated and the output voltage is reduced to "0".)

PARTS DESIGNATION (IC-50L, IC-20L, IC-30L)

The IC-50L, IC-20L, IC-30L, differ from each other in frequency band, but are similar in appearance. The description given will be mainly of the IC-50L

FRONT PANEL AMP Switch AMP Indicator LED SEND (TRANSMIT) Indicator LED APC indicator LED REAR PANEL Heat Sink Antenna Connector RF Input Connector Power Output Jack for a Transceiver Fuse Holder Power Input Plug

*Remove the protective sheet attached to the front panel before using.

HOW TO USE THE LINEAR AMPLIFIER

MOUNTING THE LINEAR AMPLIFIER

Remove the fixing plate on the back of the IC-3PS. Insert the amplifier from the rear while depressing the front panel of the IC-3PS, as shown in the photos. (To facilitate the work, insert the amplifier with its front pointed slightly downward). After the amplifier has been sungly fit in, replace the fixing plate so that its folded portion fits in the notch on the amplifier and tighten the screw. Then connect the power cord, coaxial cable etc., as shown below.

ICOM IC-3PS - MOUNTING THE LINEAR AMPLIFIER - 1

natural_image Two hands inserting a black electronic device into a larger housing (no text or symbols visible)
  1. Depress the front panel from the front.

ICOM IC-3PS - MOUNTING THE LINEAR AMPLIFIER - 2

natural_image Two hands holding a black industrial machine component (no visible text or symbols)
  1. Insert the linear amplifier.

ICOM IC-3PS - MOUNTING THE LINEAR AMPLIFIER - 3

natural_image Black-and-white photo of a desktop computer tower with ventilation grilles and front panel (no visible text or labels)
  1. Completed.

CABLE CONNECTION

FOR IC-502 · IC-202 · IC-202E · IC-215

ICOM IC-3PS - CABLE CONNECTION - 1

natural_image Black-and-white photo of an electronic device with wires and components (no visible text or symbols)

IC-502 IC-202 IC-215 IC-202E IC-50L IC-20L Antenna Coaxial Cable Fuse (5A) Power Cord 12V Battery or DC Power Source Red Black Power Cord

FOR IC-202S

ICOM IC-3PS - CABLE CONNECTION - 3

natural_image Black industrial electrical device with wires and connectors (no visible text or symbols)

IC-202S Antenna IC-20L 12V Battery or DC Power Source Red Power Connector Cord Coaxial Cable Fuse (5A) Black Power Cord

FOR IC-402
ICOM IC-3PS - CABLE CONNECTION - 5

natural_image Black-and-white photo of an electrical contactor with wires and connectors (no visible text or symbols)

IC-402 Coaxial Cable Antenna IC-30L Power Connector Cord Fuse (5A) 12V Battery or DC Power Source Red Black Power Cord

HOW TO USE THE LINEAR AMPLIFIER

After mounting the linear amplifier, connect a microphone or key to the transceiver. Then set the power switches of the IC-3PS unit and transceiver to the OFF position and the AMP switch of the linear amplifier to the DIRECT (OFF) position. Plug the AC power cord into an AC outlet and turn ON the power switch. This will light the power indicator LED of the IC-3PS.

Now your transceiver set is ready to use. If you turn ON the function switch of the transceiver, the indicator of the transceiver will light, and noise or audio will be heard from the speaker showing that the set is in receive. If you switch to transmit from this condition, the 3 Watt output of the transceiver is directly applied to the antenna.

If the AMP switch is placed in the AMP position with the transceiver in receive, the AMP indicator LED will light showing that the linear amplifier is powered. In the receive mode, the antenna is connected directly to the transceiver.

If the transceiver is switched to transmit, the SEND (TRANSMIT) indicator LED will light indicating that the linear amplifier is also switched to transmit. In this case, an amplified output of 10 Watts is applied to the antenna.

USING A POWER SUPPLY OTHER THAN THE IC-3PS.

If you want to use a power supply other than the IC-3PS, use a regulated supply giving 13.8 Volts and more than 3A current capacity. Connect the cables as shown in the drawings on page 13. Be careful to observe the correct polarity of the power supply. Connect the red lead to the (+) positive terminal and the black lead to the (−) negative terminal of the power supply. Reverse connection results in blowing the fuse in the protective circuit of the linear amplifier. Should this occur, correct the power connection and replace the fuse (5 Amp). Make sure that the supply voltage is within the range of 13.8 Volts ±15% in both transmit as well as receive.

APC CIRCUIT

If the SWR becomes high due to antenna trouble or poor matching, the APC circuit will work and turn OFF the SEND indicator LED and light the APC indicator LED. In this condition, the linear amplifier will not switch ON (to the transmit state), thus protecting the power amplifier transistor. When the APC circuit is activated, the transceiver output is directly fed to the antenna. This prevents communication from being completely interrupted even when the SWR is high.

However, with the IC-50L and the IC-20L, set the AMP switch to the DIRECT position and then check the antenna and feeder and remove any trouble before continuing operation. In the IC-30L, the switch may remain in the AMP position while checking for trouble before continuing operation.

If you connect a receive pre-amp to the amplifier, one that depends on a carrier for T/R switching, the APC may work due to a time lag caused by T/R switching.

CAUTION:

Note that if the Function switch of the transceiver is turned OFF with the AMP switch of the IC-50L or IC-20L set to the AMP position, the IC-50L and IC-20L is switched to the transmit mode, though no RF is emitted. The IC-30L is not switched to the transmit mode even if the IC-402 is turned OFF.

MOBILE INSTALLATION

Connect the cables as shown in the drawing using the mobile mounting bracket, available as an option. The three mounting holes on the side of the amplifier allow adjustable mounting. Using the center and the rear holes will extend the amplifier forward, while using the center and forward holes will extend the amplifier to the back of the holder. The transceiver and linear amplifier may be separated by a distance of about one meter. Therefore, it is possible to set the transceiver near the driver's seat and place the linear amplifier under the seat.

Car body Mounting screw's nut Flat washer Mounting bracket Flat washer Gimp screw Mounting screw Mounting hole

THEORY OF OPERATION

IC-50L, IC-20L

POWER AMPLIFIER CIRCUIT

The 3 Watt input from the transceiver is fed to the base of Q1 through relay RL2, and after being amplified by Q1 and harmonics suppressed by an M-derived filter, applied to the external antenna through relay RL1 as a 10 Watt output with very little spurious.

DIRECT CIRCUIT

The transceiver is directly connected to the external antenna when the IC-3PS is switched OFF, when the APC circuit is activated, or when in the receive mode.

BIAS CIRCUIT

A linear amplifier is susceptible to thermal runaway due to the bias given to the transistor. The amplifier prevents the variation of bias current by preventing variation of the supply voltage with a voltage regulator circuit consisting of D2 and Q2 and by temperature compensation of the bias control of Q1 by D1.

T/R SWITCHING CIRCUIT

In receive, about 4 Volts DC from the transceiver is superimposed on the coaxial cable. This voltage is taken out through L1 and fed to switching circuits Q3 and Q4. During receive, Q3 is ON and Q4 is OFF, and relay RL1 is in activated giving a direct antenna connection. When switched to transmit, Q3 is turned OFF and Q4 turned ON, and relay RL1 activates the power amplifier. At the same time, the SEND indicator LED is lit.

APC CIRCUIT

In the amplifier, the SWR detector, incorporated in the antenna circuit, detects reflected waves. When a mismatch occurs, the detected RF is rectified by D3, and the DC voltage is fed to the base of Q6 and keeps Q5 and Q6 ON. This switches OFF Q4 through D6 and returns relay RL1 to DIRECT, to protect Q1. At the same time, the APC indicator LED is lit.

IC-30L

POWER AMPLIFIER

The 3 Watt input from the transceiver is fed to the base of Q1 through coaxial relay RL1, then amplified by Q1 and fed through coaxial relay RL2 and a helical Band Pass Filter for harmonic suppression. It is then applied to the external antenna as a 10 Watt output with very little spurious. C1 and R1 provided in the input circuit controls driving power to give 10 Watt output.

DIRECT CIRCUIT

The transceiver is directly connected to the external antenna through the helical Band Pass Filter when the amplifier is switched OFF, when the APC is activated, or when in the receive mode. Here, the loss is about 0.4 dB including the connector and filter.

BIAS VOLTAGE REGULATOR CIRCUIT

A linear amplifier is susceptible to thermal runaway due to the bias current given to the transistor. The amplifier prevents variation of bias current by preventing variation of the supply voltage, by means of Q3, and by temperature compensating the bias control of Q1 by Q2. Q2 feeds the regulated bias voltage to Q1.

APC CIRCUIT

The APC circuit of this amplifier works only against over current because a final stage transistor of high puncture resistance is used (resistant to all phases of VSWR under infinite load when Vcc=15.2 Volts, f=470MHz, Po=18 Watts).

The voltage drop of R11 connected to the collector of Q1 is switched by Q4 and applied to the APC control circuit to effect detection.

APC CONTROL, T/R SWITCHING CIRCUIT

APC is controlled by a flip flop composed of two sets of NAND gates. This is usually reset in the receive mode and Pin 11 of IC1 is brought to a HIGH level. In the transmit mode, Pin 3 of IC1 brought to a LOW level, Q5 is turned OFF and Q6 turned ON, and coaxial relays RL1, RL2 activate and the power amplifier circuit will work. At the same time, the SEND indicator LED is lit.

If the APC circuit operates, Pin 11 of IC1 is brought to a LOW level and Q6 is cut OFF, relays RL1 and RL2 deactivate, causing a direct connection to the antenna. Since Pin 4 of IC1 is brought to a HIGH level, Q7 is turned ON and the APC indicator LED lights.

SCHEMATIC DIAGRAM

(IC - 3PS)
S) DC OUT 13.0V B1 1K B1 15Ω S1 POWER

AC 117V 240V PI F01 117V 2A FI 240V 1A (IC-3PU) Q4 82880252 C12.01 T1 117V TP5B 240V TP6C C14 4700 Q1 196370 Q2 286370 Q3 47 Q4 132000 Q5 2861013 Q6 2770+W Q7 350P Q8 350 Q9 350P Q10 470 Q11 470W Q12 470W Q13 470W Q14 470W Q15 470W Q16 470W Q17 470W Q18 470W Q19 470W Q20 470W Q21 470W Q22 470W Q23 470W Q24 470W Q25 470W Q26 470W Q27 470W Q28 470W Q29 470W Q30 470W Q31 470W Q32 470W Q33 470W Q34 470W Q35 470W Q36 470W Q37 470W Q38 470W Q39 470W Q40 470W

(IC - 50L)
Electrical schematic diagram with labeled components including transistors, resistors, capacitors, and integrated circuits U95 and U96.

(IC - 20L)
Electrical schematic diagram with labeled components including transistors, capacitors, resistors, and integrated circuits U95 and U96.

(IC - 30L)
IN RL1 C2 8P L1 LA-123 Q1 2SC1968A L3 LA-122 L4 LA-123 C19 7P RL2 SL1 C1 47P R4 10K C2 470P OUT J1 ANT C1 47P J2 IN U-159 MAIN C6 47 C7 1 C4 8P C8 .0047 C10 5P C11 5P C12 5P C13 22 C14 .0047 C15 .001 C16.1 C17 7P C20 2P C21 470P R5 180 C3 2SB562 R8 47 R9 47 D3 1SS53 R13 500 Q4 2SA 1015 R14 K C27 470P R15 47K R16 47K AMP S1 J3 EXT DC DC IN C3 1000 FH1 P1 AMP SEND APC U-158 LED IC1 μPD4011C R17 100K C28 470P R2 100 R4 100 C22 470P R6 180 C23 470P R7 1K D1 1SS53 C24 470P C25 470P D2 WZ-056 R12 2.2K R20 1K D4 XZ-096 R21 47K Q5 2SC945 Q6 2SD468 Q7 2SC945 R23 10K R19 47K D6 15CD11 J5 J6 R1 K D1 103S D2 103S D3 103S R2 R3 R3 R4 R5 L5 LB-45A L6 LB-45A OUT

OPTIONS

ICOM IC-3PS - OPTIONS - 1

natural_image Black-and-white photo of various cable and connector components (no text or symbols visible)

MOBILE MOUNTING KIT FOR IC-50L, IC-20L OR IC30L

ICOM IC-3PS - OPTIONS - 2

natural_image Black-and-white photo of a desk lamp with a curved arm and two wheels, no visible text or symbols.

IC-SM2 DESK MICROPHONE ELECTRET CONDENSER TYPE WITH PRE-AMP

ICOM IC-3PS - OPTIONS - 3

ICOM

ICOM INCORPORATED

1-6-19, KAMI KURATSUKURI, HIRANO-KU, OSAKA JAPAN

Printed in Japan

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Produktinformationen

Marke : ICOM

Modell : IC-3PS

Kategorie : Empfänger