[cctalk] old HP scope with SMA connectors

Do I really need a torque spanner? Chinese spanners aren't expensive. But I'm not sure the unit even works (the mainframe seems to work fine, not so sure the ancillary test set). Hp 54120a + 54122a << iirc, maybe 54121a??? In any event if working this is either a 12ghz or 20ghz setup.