A look inside the symmetricom 6502 frequency distribution amplifier.
Input stage is based on LMH6702 http://www.ti.com/lit/ds/symlink/lmh6702.pdf.
Output stage is based on LMH6609 http://www.ti.com/lit/ds/symlink/lmh6609.pdf
PDF of sketched schematic, based on the photos: 6502B_schematic_v2
I measured the phase-noise at 10MHz earlier. This amplifier has a far-out phase-noise floor of around -163 dBc/Hz.