430-440 MHz linear amplifier 70 cm 400W
Frequency band - 430-440 MHz. Types of radiation - SSB, CW, DIGI, RTTY ect. Maximum SWR in the antenna - 1.5:1. Consumption current - 15A max. Input impedance - 50 ohm (unbalanced). Output impedance 50 ohm (unbalanced). Input / output connectors - N-type. Amplifier circuit - push-pull class AB. Output Stage Transistors - BLP05H9S500P. Dimensions - W x H x D (mm) - 290x140x205.
The amplifier is designed for an impedance of 50 ohms. If the antenna-feeder devices are matched to a resistance of 50 Ohms, and the SWR on all operating ranges does not exceed the value of 1.5 to 1, then the amplifier can be operated without additional coordination. If the SWR is greater than 1.5 to 1, then the use of additional matching devices is recommended. In the output stage of the power amplifier, a high-quality LDMOS transistor BLP05H9S500P is used. The process of switching the transmit-receive in the amplifier is provided by coaxial relays controlled by a digital sequencer on the TINY13A microprocessor, which allows you to control an external LNA, as well as control the transceiver by the TX INHBIT command.
The power amplifier is equipped with special high-speed protection circuits. For example, from excess of output power, high value of SWR in the antenna, high drain current of output transistors and overheating. To control the operating parameters of the power amplifier, a digital measuring device is used, on which the output power level and the SWR value are displayed. If the temperature of the transistor case exceeds + 60 ° C, the bimetallic thermal switch located on the transistor case will be triggered and transmission becomes impossible, until it cools down to + 55 ° C. Protection against exceeding the maximum permissible output power. If the output power level exceeds the permissible threshold, a protection will be activated that disconnects the power from the output transistors. The P LED lights up on the front panel. A power cycle is required to reset the protection. If the SWR in the load exceeds the value of 1.5: 1, then the protection system will trigger. The SWR LED on the front panel lights up. To reset the protection, turn off the power. In case of protection operation, we recommend checking the SWR antenna and feed line. Protection against exceeding the maximum permissible current. If the current value of the output transistors exceeds the permissible threshold, a protection will be activated that disconnects the power from the output transistors. The LED I on the front panel lights up. The goods will be sent from Russia, Voronezh. My other products are here. The item "430-440 MHz linear amplifier 70 cm 400W" is in sale since Monday, October 26, 2020. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Amplifiers". The seller is "v_r3kr" and is located in Voronezh. This item can be shipped worldwide.- Model: PA400
- Band: AM
- Type: Linear Amplifier
- Supported Modes: Digital mode
- Power: 400 W
- Brand: Unbranded
