Toptek Communications PA-80V-U Dual Band FM VHF/UHF Power Amplifiers are attractive and flexible units intended for analog use with dual band handheld FM transceivers (HT), for Amateur 2M/70cm applications. The PA80V-U operates over the 138-174 MHz and 430-470 MHz ranges with a nominal maximum power output of 80 watts on both bands. Typically, full output is achieved with 5 watts input from the transceiver. At a minimum input of 1 watt (maximum 10 watts), the amplifier automatically recognizes the transmitting frequency, switches to the appropriate band and signal path and keys the PA. The output power level can be set independently for VHF and UHF, preset to one of four steps: 25W, 45W, 65W, 85W. A multi-function eight LED bar graph meter measures Power Out, indicates power level settings, SWR (when Show SWR button is depressed), and indicates High SWR, Overdrive, Over-Under Voltage, High Temperature and PA Fail.
Only FM Mode is supported.
The actual VSWR is represented by a single "moving dot”. The lowest reading is 1.20, below this value a respective LED will start blinking , indicating LOW SWR
The highest reading is 1.90 and with a reading past 2.00 a different respective LED will begin to blink, signaling HIGH SWR.
A receive Low Noise Amplifier (RX LNA) can be turned on or off independently from the transmit Power Amplifier (TX PA). The LNA provides about 21db on VHF and 12dB on UHF.
Input and Output connectors are Type N female for the best SWR and lower losses. The PA-80V-U requires 13.8 VDC at a maximum of 13A.
These are NOT compatible with DMR and P25 modes.
Specifications:
- Frequency range (VHF): 138 MHz-174 MHz
- Frequency range UHF): 430 MHz-470 MHz
- Maximum output power: 85 Watts ALC limited
- Input power range: 1 Watt - 10 Watt Between carrier detect and overdrive thresholds
- Input power for full output: 5 Watt Frequency dependent
- Bypass power: 50 Watt
- Harmonics suppression: 60 dBc
- Modulation: FM, AM*
- Weight: 1.15kg
- Dimensions: H-50 x W-25 x L-210mm
- Circuit type: Twin MOSFET, PUSH PULL, two independent amplifier for VHF and UHF
*) AM can be used with caution, setting ALC power to maximum, and adjusting drive power to obtain approximately 20 30 Watt output power. That will leave required headroom for modulation. ALC must not get engaged during modulation peaks.