These are 7" x 2.5" x 1.5" and 7" x 2.5" x 2". Contain subminiature tubes (5678, 1AD4, 5783, 5840). All are marked "152-174 MC". I have 3 modules: Local Osc / RF Ampl / 2nd IF Discr. Was wondering what equipment these would be from. Thank you, --ian K3IMW