KIT for protection power amplifier 2400W LDMOS BLF188XR MOSFET TUBE
KIT for protection power amplifier 2400W 1.8-54 MHz. TX-RX unit with tandem match 1 pcs.
TX-RX unit is intended to provide the switching of amplifier between receive and transmit modes. Input signal is PTT line from transceiver. When PTT input goes low, the relays directs the signal from transceiver to PA input and from PA output to antenna. When PTT is high (RX mode) the antenna is connected directly to transceiver.The second tandem match is used as a high SWR detector with incorrect, spontaneous switching, failure of the LPF. More than 50% of the transistor amplifier failure occurs due to incorrect or spontaneous switching of the LPF. When there is a spontaneous switching of the LPF, which depends on the interference to the band decoder, transceiver, computer, etc. Then the combustion of the transistor happens.
Switching off the biase voltage to provide additional protection. Voltage suppressor Zener diodes has the limiting level 21V (approximately 8W input). Thanks to input attenuator the. VSWR rise just slightly when diodes are clamping the signal. If input power occasionally rise to very high level, the comparator-trigger circuit switches off the 5 ms release time relay, thus disconnecting the input out of power.This power level is trimpot tuneable. This trigger controls the BIAS circuit also through transistor key. The input power source i. Transceiver stays connected to attenuator, so nothing happens to it output. When system is triggered, indicating LED goes on. It is necessary to disconnect the supply voltage in order to set to initial state. LCD power SWR meter 2400W max 1 pc. The item "KIT for protection power amplifier 2400W LDMOS BLF188XR MOSFET TUBE" is in sale since Monday, July 16, 2018. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Amplifiers". The seller is "r3kbo4" and is located in Voronezh. This item can be shipped worldwide.
- MPN: Does Not Apply
- Country/Region of Manufacture: Russian Federation
- Brand: Unbranded
- Band: AM
- Supported Modes: AM