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.
The leads disappear right after that. You can not find the problem. You need to have control over the state of the LPF. Size 160 x 80 x 25(h) mm.
The application of this DC switch is to gate the power supply current to solid-state amplifier and safely disconnect it in case of emergency. Over voltage protection (including load dump). Low ohmic inverse current operation. Diagnostic feedback with load current sense. Operating voltage 5 58 VDC.
Operating current 38 44 A. On-state resistance 7.2 m.
To allow the switch to be disabled by an emergency signal, 3 protection triggers are added to board. Protector to disconnect the amplifier from power supply if SWR rises higher than preset. Level 2.0:1 (may be varied by user). Forward and reflected voltages from directional coupler must be. Output power excess protector to disconnect the amplifier if output power is more than preset level.
(150W and higher, may be varied by user). DC current excess protector to disconnect the amplifier if current consumption is more than preset level.
(20 A with single BTS660P and higher, may be varied by user). Red LED shows which trigger is on. Power off and then on to reset device.
The onboard current sensor provides about +1VDC at 30 Amps for external current meter. Meter impedance must be at least 10 KOhm. BTS660P has a min switch-off time as low as 30 microseconds and fast enough to protect the amplifier in case of emergency. Two BTS660P units may be installed on PCB to provide the current up to 2500 W amplifiers without additional heatsinks.
Size - 120 x 50 mm. Input protection with ATT 7dB 1 pc. This unit is intended to provide the anti-overshot protection to gates of transistors. The device has three stages of protection. Peak power Zener voltage suppressors limiting the maximum voltage level on amplifier input.
High speed relay disconnecting the input from signal source when input power rise above the preset level. 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