New Adaptors For The Vacuumtube Bridge Sub Miniature Types Now Available

Fold And Cut Houses With Printer Paper

Although the fundamental circuit has remained unchanged since the first Type 561-A Vacuum-Tube Bridge was designed, the mechanism for connecting the tube into the circuit has required considerable modification. The original bridge had 4-, 5-, 6-, and 7-pin sockets on the panel with provision for connecting other types through binding posts.2 An 8-pin socket was added later, but, as the list of tube bases grew, it became evident that the panel socket system would eventually be inadequate. In...