10W HF Linear Power Amplifier. Comfortably produces 10W from 12V supply. Compact design with huge heatsink included, which will not overheat even on continuous 100% duty-cycle operation. 26dB gain with +/- 1dB gain flatness from 2 to 30MHz.

This 10W HF Linear Power Amplifier kit has no Surface Mount Components (SMD) to solder. It does contain several SMD components but they are already pre-mounted. There are a number of small transformers to be wound, and assembly requires care and patience.

The push-pull driver stage uses two BS170 transistors in the amplifier design used in the SoftRock transmitter stage. The final uses two IRF510 transistors in push-pull. Yes, this humble low-cost MOSFET really is capable of excellent performance all the way up to 10m band and beyond! Short lead-lengths and PCB layout are extremely important, they are the key to success. 

Features:

• 10W output from 2 to 30MHz, using 12V Supply
• Generously-sized heatsink, will not overheat even on continuous 100% duty-cycle modes
• 2-stage amplifier provides 26dB of gain
• Push-pull driver and push-pull finals, for high linearity and low harmonic content
• +/- 1dB gain flatness from 2 to 30MHz
• 4dB down at 6m (50MHz) and 8dB down on 4m (70MHz)
• Standard 50-ohm output
• Through-hole plated PCB, several SMD components already pre-mounted
• Standard inexpensive components throughout
• Tested for 1 hour at full-power 10W, 100% continuous duty-cycle with no forced air cooling
• Tested for 15 minutes at 20W, 100% continuous duty-cycle with no forced air cooling
• Tested at 20V supply
• Tested into open load, shorted load and various mismatches without instability (oscillation)

Hard-copy assembly instructions are not included in the kit. You need to download the assembly and operating instructions manual from http://qrp-labs.com/linear 

NOTE: Any Linear should always be followed by suitable Low Pass Filtering