COHERENT 210 SCHEMATIC POSTED

the 210 power meter schematic is in the FTP.
Not reccomended for beginners, due to the damping and scale and offset adjustments. Plus the head is 1 mV per Watt, so your down in the noise, which requires careful adjustment and layout.

Buy a coherent powerpen or a lasersbee instead of building a 210. Shameless plug for Buy Something and Keep our Economy Going!

Steve