The Fairchild 660 / 670 Tube Compressor/Limiter - Vintage King
Black Tornado Studio - Fairchild 670 Limiter. If you examine any monophonic or stereo record or tape available today, from any major labels throughout the world, it undoubtedly uses a FAIRCHILD limiter
Tony Visconti Waxes Poetic About The Fairchild Compressor
Which compressor is best? - The classics - AudioKickstart.com