Good, thanks for the link. 3M conductive adhesive? Have to go looking for that. I don't care what it looks like.
Issue I'm having is that I'm getting some kind of modulation in a mixer at a period of 165 seconds or so. This seems like the offset between my Rubidium standard and oscillators I am phase noise testing. the amplitude is only about +/- 4e-16. But is is probably coming in on the cables. They are the blue, 100% shielded 50ohm type. I've swapped out everything (e.g. oscillators, counters, TICs, mixers, phase detectors, amps (using QB-188 now), attenuators, cables, DDS units, etc.) All the easy things to plug in as it's all connectorized. I've put filters on things, and taken filters off. I've tried directional couplers, resistive vs reactive power splitters, loads. I've ordered some non-reflective filters too. I've measured impedance circuit by circuit with an HP4815 vector impedance meter (my personal fav). I've put the VNA on everything, changed scopes, tried several spectrum analyzers, batteries, lt3045 regulators, different opamps, loose shielding and I would CNC a nice box if I knew it would correct the problem!!!!!
If I can see a reduction with the tape then I will machine the box.
Thanks
Jerry