I have a pair of First watt F7 boards, designed by me, and 2 types of power supply.
The schematic is based on simulation and tips and hints from forum members, you can read in First Watt F7 review thread.
The boards are symmetrical and can accept another pair of output transistors to make it a Turbo version.
The output transistors are Exicon lateral Fets, resistors are high quality Dale RN55, input fets are 2sk170 and 2sj74
Compare to original I added some decoupling electrolytic capacitors on the board, to further reduce the noise.
This sound very good, in fact this is the best sounding First watt amplifier in my opinion, mostly because it has the highest dumping factor of all, 100.
The bass is amazing compare to the others, and I have built a lot like F3 , F5, F6 etc.
If you want to try an F7 now is your chance.
Price id $180 USD per pair, and $15 for the power supply board.
The schematic is based on simulation and tips and hints from forum members, you can read in First Watt F7 review thread.
The boards are symmetrical and can accept another pair of output transistors to make it a Turbo version.
The output transistors are Exicon lateral Fets, resistors are high quality Dale RN55, input fets are 2sk170 and 2sj74
Compare to original I added some decoupling electrolytic capacitors on the board, to further reduce the noise.
This sound very good, in fact this is the best sounding First watt amplifier in my opinion, mostly because it has the highest dumping factor of all, 100.
The bass is amazing compare to the others, and I have built a lot like F3 , F5, F6 etc.
If you want to try an F7 now is your chance.
Price id $180 USD per pair, and $15 for the power supply board.
