Yaesu is a well-known manufacturer of amateur radio equipment. Their products are widely used by ham radio enthusiasts all over the world. One of their most popular products is the Yaesu PA, which is a power amplifier designed to boost the output power of a ham radio station. In this article, we will discuss the 10 wiring diagrams for Yaesu PA and how to use them.
Introduction to Yaesu PA
A power amplifier is an essential component of a ham radio station. It is used to amplify the RF signal generated by a transceiver to a higher power level. This increased power level helps the signal to reach farther distances and communicate with other ham radio operators. The Yaesu PA is a high-performance power amplifier designed to work with Yaesu transceivers.
The Yaesu PA is a Class AB linear amplifier that provides up to 1.5 kW of output power. It is designed to operate on a 50-ohm load and has a built-in protection circuit to prevent damage from overdrive, overtemperature, and overvoltage. The amplifier is also equipped with an automatic antenna tuner and a cooling fan to keep the temperature under control.
Wiring Diagrams for Yaesu PA
The Yaesu PA requires a proper wiring connection to operate correctly. There are ten different wiring diagrams available for the Yaesu PA, and each one is designed for a specific purpose. Here are the ten wiring diagrams for Yaesu PA:
| Wiring Diagram | Purpose |
|---|---|
| Diagram 1 | Transceiver to PA interconnection |
| Diagram 2 | Transceiver to PA with separate RX/TX cables |
| Diagram 3 | Transceiver to PA with relay control |
| Diagram 4 | Transceiver to PA with ALC feedback |
| Diagram 5 | Transceiver to PA with PTT-VOX control |
| Diagram 6 | Transceiver to PA with sequencer |
| Diagram 7 | Transceiver to PA with separate RX/TX cables and sequencer |
| Diagram 8 | Transceiver to PA with separate RX/TX cables, sequencer, and relay control |
| Diagram 9 | Transceiver to PA with ALC feedback, sequencer, and relay control |
| Diagram 10 | Transceiver to PA with PTT-VOX control, sequencer, and relay control |
Diagram 1: Transceiver to PA interconnection
This wiring diagram shows the basic connection between a Yaesu transceiver and a Yaesu PA. The transceiver is connected to the PA via the coaxial cable, and the PA is powered by a 50-ohm coaxial cable. The RF output level is adjusted by the ALC voltage from the transceiver.
The audio input to the PA is provided by the transceiver’s audio output. The audio level is adjusted by the audio gain control on the transceiver. The RF output power is controlled by the transceiver’s power output control.
To ensure proper operation, make sure that the transceiver and the PA are properly grounded. Use a high-quality coaxial cable and connectors to minimize signal loss and interference.
Diagram 2: Transceiver to PA with separate RX/TX cables
This wiring diagram shows how to connect a Yaesu transceiver to a Yaesu PA using separate RX and TX cables. This configuration allows the transceiver and the PA to operate independently, which is useful for split operation.
The RX and TX cables are connected to their respective jacks on the transceiver and the PA. The RF output power is controlled by the transceiver’s power output control, and the audio input level is adjusted by the audio gain control on the transceiver. The RF output level is adjusted by the ALC voltage from the transceiver.
Make sure that the RX and TX cables have the same length to minimize phase shift and signal distortion.
Diagram 3: Transceiver to PA with relay control
This wiring diagram shows how to connect a Yaesu transceiver to a Yaesu PA with relay control. The relay is used to switch between the transceiver’s RX and TX modes automatically.
The transceiver is connected to the PA via the coaxial cable, and the PA is powered by a 50-ohm coaxial cable. The RF output power is controlled by the transceiver’s power output control, and the audio input level is adjusted by the audio gain control on the transceiver.
The relay is controlled by the PTT signal from the transceiver. When the transceiver is in TX mode, the relay switches to the PA, and when the transceiver is in RX mode, the relay switches to the transceiver’s antenna jack.
Make sure that the relay is compatible with the transceiver’s PTT voltage and current requirements. Consult the user manual for more information.
Diagram 4: Transceiver to PA with ALC feedback
This wiring diagram shows how to connect a Yaesu transceiver to a Yaesu PA with ALC feedback. The ALC voltage is used to control the RF output power of the PA and prevent overdrive.
The transceiver is connected to the PA via the coaxial cable, and the PA is powered by a 50-ohm coaxial cable. The ALC voltage is fed back from the PA to the transceiver’s ALC jack, which automatically adjusts the RF output power to maintain a constant level.
The audio input level is adjusted by the audio gain control on the transceiver, and the RF output power is controlled by the transceiver’s power output control.
Make sure that the ALC voltage does not exceed the maximum level specified by the transceiver’s user manual. Excessive ALC voltage can cause distortion and damage to the transceiver and the PA.
Diagram 5: Transceiver to PA with PTT-VOX control
This wiring diagram shows how to connect a Yaesu transceiver to a Yaesu PA with PTT-VOX control. The PTT-VOX circuit is used to switch between the transceiver’s RX and TX modes automatically.
The transceiver is connected to the PA via the coaxial cable, and the PA is powered by a 50-ohm coaxial cable. The audio input level is adjusted by the audio gain control on the transceiver, and the RF output power is controlled by the transceiver’s power output control.
The PTT-VOX circuit is controlled by the audio input level. When the audio input level exceeds a certain threshold, the PTT circuit switches to the PA, and when the audio input level drops below the threshold, the PTT circuit switches to the transceiver’s antenna jack.
Make sure that the audio input level is adjusted correctly to prevent false triggering of the PTT circuit. Consult the user manual for more information.
Diagram 6: Transceiver to PA with sequencer
This wiring diagram shows how to connect a Yaesu transceiver to a Yaesu PA with a sequencer. The sequencer is used to protect the PA from damage caused by overdrive and high SWR.
The transceiver is connected to the PA via the coaxial cable, and the PA is powered by a 50-ohm coaxial cable. The audio input level is adjusted by the audio gain control on the transceiver, and the RF output power is controlled by the transceiver’s power output control.
The sequencer is connected to the PA’s ALC jack and the transceiver’s PTT jack. When the transceiver is in TX mode, the sequencer waits for a certain time before enabling the PA. This delay prevents the PA from being damaged by high SWR and overdrive.
Make sure that the sequencer is compatible with the transceiver’s PTT voltage and current requirements. Consult the user manual for more information.
Diagram 7: Transceiver to PA with separate RX/TX cables and sequencer
This wiring diagram shows how to connect a Yaesu transceiver to a Yaesu PA using separate RX and TX cables with a sequencer. This configuration allows the transceiver and the PA to operate independently, which is useful for split operation.
The RX and TX cables are connected to their respective jacks on the transceiver and the PA. The RF output power is controlled by the transceiver’s power output control, and the audio input level is adjusted by the audio gain control on the transceiver.
The sequencer is connected to the PA’s ALC jack and the transceiver’s PTT jack. When the transceiver is in TX mode, the sequencer waits for a certain time before enabling the PA. This delay prevents the PA from being damaged by high SWR and overdrive.
Make sure that the RX and TX cables have the same length to minimize phase shift and signal distortion. Also, make sure that the sequencer is compatible with the transceiver’s PTT voltage and current requirements. Consult the user manual for more information.
Diagram 8: Transceiver to PA with separate RX/TX cables, sequencer, and relay control
This wiring diagram shows how to connect a Yaesu transceiver to a Yaesu PA using separate RX and TX cables with a sequencer and relay control. This configuration allows the transceiver and the PA to operate independently and switch between RX and TX modes automatically.
The RX and TX cables are connected to their respective jacks on the transceiver and the PA. The RF output power is controlled by the transceiver’s power output control, and the audio input level is adjusted by the audio gain control on the transceiver.
The sequencer is connected to the PA’s ALC jack and the transceiver’s PTT jack. When the transceiver is in TX mode, the sequencer waits for a certain time before enabling the PA. This delay prevents the PA from being damaged by high SWR and overdrive.
The relay is used to switch between the transceiver’s RX and TX modes automatically. When the transceiver is in TX mode, the relay switches to the PA, and when the transceiver is in RX mode, the relay switches to the transceiver’s antenna jack.
Make sure that the RX and TX cables have the same length to minimize phase shift and signal distortion. Also, make sure that the sequencer and the relay are compatible with the transceiver’s PTT voltage and current requirements. Consult the user manual for more information.
Diagram 9: Transceiver to PA with ALC feedback, sequencer, and relay control
This wiring diagram shows how to connect a Yaesu transceiver to a Yaesu PA with ALC feedback, sequencer, and relay control. This configuration allows the transceiver and the PA to operate independently and switch between RX and TX modes automatically while maintaining the correct RF output power level.
The transceiver is connected to the PA via the coaxial cable, and the PA is powered by a 50-ohm coaxial cable. The ALC voltage is fed back from the PA to the transceiver’s ALC jack, which automatically adjusts the RF output power to maintain a constant level.
The sequencer is connected to the PA’s ALC jack and the transceiver’s PTT jack. When the transceiver is in TX mode, the sequencer waits for a certain time before enabling the PA. This delay prevents the PA from being damaged by high SWR and overdrive.
The relay is used to switch between the transceiver’s RX and TX modes automatically. When the transceiver is in TX mode, the relay switches to the PA, and when the transceiver is in RX mode, the relay switches to the transceiver’s antenna jack.
Make sure that the ALC voltage does not exceed the maximum level specified by the transceiver’s user manual. Excessive ALC voltage can cause distortion and damage to the transceiver and the PA. Also, make sure that the sequencer and the relay are compatible with the transceiver’s PTT voltage and current requirements. Consult the user manual for more information.
Diagram 10: Transceiver to PA with PTT-VOX control, sequencer, and relay control
This wiring diagram shows how to connect a Yaesu transceiver to a Yaesu PA with PTT-VOX control, sequencer, and relay control. This configuration allows the transceiver and the PA to operate independently and switch between RX and TX modes automatically while maintaining the correct RF output power level.
The transceiver is connected to the PA via the coaxial cable, and the PA is powered by a 50-ohm coaxial cable. The audio input level is adjusted by the audio gain control on the transceiver, and the RF output power is controlled by the transceiver’s power output control.
The PTT-VOX circuit is controlled by the audio input level. When the audio input level exceeds a certain threshold, the PTT circuit switches to the PA, and when the audio input level drops below the threshold, the PTT circuit switches to the transceiver’s antenna jack.
The sequencer is connected to the PA’s ALC jack and the transceiver’s PTT jack. When the transceiver is in TX mode, the sequencer waits for a certain time before enabling the PA. This delay prevents the PA from being damaged by high SWR and overdrive.
The relay is used to switch between the transceiver’s RX and TX modes automatically. When the transceiver is in TX mode, the relay switches to the PA, and when the transceiver is in RX mode, the relay switches to the transceiver’s antenna jack.
Make sure that the audio input level is adjusted correctly to prevent false triggering of the PTT circuit. Consult the user manual for more information. Also, make sure that the sequencer and the relay are compatible with the transceiver’s PTT voltage and current requirements.
FAQs
Q: What is a power amplifier?
A: A power amplifier is an electronic device that amplifies the RF signal generated by a transceiver to a higher power level. This increased power level helps the signal to reach farther distances and communicate with other radio operators.
Q: What is Yaesu PA?
A: Yaesu PA is a power amplifier designed to work with Yaesu transceivers. It is a Class AB linear amplifier that provides up to 1.5 kW of output power.
Q: How many wiring diagrams are available for Yaesu PA?
A: There are ten different wiring diagrams available for Yaesu PA, and each one is designed for a specific purpose.
Q: What is ALC feedback?
A: ALC feedback is a method used to control the RF output power of a power amplifier. The ALC voltage is fed back from the PA to the transceiver’s ALC jack, which automatically adjusts the RF output power to maintain a constant level.
Q: What is a sequencer?
A: A sequencer is an electronic device that is used to protect a power amplifier from damage caused by overdrive and high SWR. It is connected between the transceiver and the PA and waits for a certain time before enabling the PA.
Q: What is PTT-VOX control?
A: PTT-VOX control is a circuit that is used to switch between the transceiver’s RX and TX modes automatically. It is controlled by the audio input level, and when the audio input level exceeds a certain threshold, the PTT circuit switches to the PA.
Conclusion
Proper wiring connection is essential for the proper functioning of a Yaesu PA. In this article, we discussed the ten wiring diagrams available for Yaesu PA and how to use them. We
