This board was created to enable the use of the latest LDMOS-FET's devices. With this board, can be used with different types of LDMOS transistors. For example - BLF178, BLF178XR, BLF188, BLF188XRS, BLF578, BLF578XR, MRF6VP11KH, MRFE6VP61K25HR6. This 1400 W extremely rugged LDMOS power transistor for broadcast and industrial applications in the HF to 600 MHz band.
The BLF188XR and BLF188XRS are capable of withstanding a load mismatch corresponding to VSWR > 65:1. In a range from 2 to 30MHz (test signal CW) BLF188XR, Pout is 1270W. FEATURES of the module with LDMOS BLF188XR. Model: PA Unit BLF188XR - ReV. RF power output: 1000W typical, 1200W max.1.8-35MHz; 700W typical, 900W max. Modes Supported : FM, CW, SSB and others. RF power input: 7W typical, 10W max. Board dimensions: 163 x 120 mm. BIAS adjusted in accordance with temperature.
Vbias: 12V for keying the amplifier. Additional elements for AFC correction. Input VSWR is optimized with attenuator on PA input. The heat sink and a copper heat spreader (not supplied) have to be larger than 200mm x 140mm and proper fan cooling must be provided too. If you want to get 1000W Pout, you need very low input power, about 3-5W Pin.
In this order, you need to be very carefully on first power on. On 160m, 80m, 40m, 30m, 12m, 10m can be Pout up to 1200W. On 50MHz can be Pout up to 900W. On 70MHz can be Pout up to 700W.
To increase the gain at frequencies of 30-70 MHz is possible by changing the values of capacitors C21, C11, C48. A full technical documents with all instructions on CD (in parcel) is provided with the board.The item "1kW 1.5-30MHz 700W 50MHz HF POWER AMPLIFIER BOARD for LDMOS BLF188XR/XRS BLF188" is in sale since Sunday, October 4, 2020. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Amplifiers". The seller is "dnradio" and is located in Europa. This item can be shipped worldwide.