HF power amplifier, for QRP transceiver, Improve signal. Can be used both  as a base and mobileunit, Extremely Small Compact and lightweight , Full integration  with the FT-817 using the supplied interface cable. The amplifier incorporates  various protection circuits such as high VOLTAGE, front mounted LED display. 

This amplifier can be successfully used with other QRP rigs such as the ICOM 

IC-703(and Elecraft KX3). 

YAESU FT-817ND Quick operating manual: 

1. Connect power cord to DC power supplier, Red to "+", Black to" -" 

2. Connect ACC cable to FT-817 ACC and amp

3. Adjustment “BAND ADJ” button， Select the band. 

4. Connect antenna to amp "ANT" and "input" from FT-817 antenna out. Notice! The 

antenna you used that should well tuned, the SWR should less than 1:1.5 

5. Open the power on both power supplier and AMP. The power indicate on. 

6. Power on FT-817, the band indicate on Amp shoule be on. 

7. Press PTT, the TX indicate on Amp should be on.
Notice! If working on   FM or SSTV for long operating time, should lower the output power on FT-817,  say 2.5W or 1W. 

Connect acc cable to transceiver PTT-TX and amplifier，ACC green to“GND”，RED 

TO“TX-PTT”，the radio “TX-PTT”view manual. 

Specifications 

Frequency Band：80m 40m 30m-17m 15m-10m 

Operating Modes：SSB CW AM， RTTY and FM-Reduced duty cycle

RF input: 5W

Out power：45W

Band mode：Manual

Power requirement：13.8V 8A， RED “+” BLACK “-” 

Cooling method:passive air cooling

Antenna connector：SO-239 50Ω

Size：155*100*35（mm）D*W*H

Weight：0.55KG 

Package list: 

1x MX-P50M 

1x Power cord 

1x for FT-817ND ACC control cable