gizes, then slowly increase its capacitance again until the relay just opens. ... In Case of Difficulty If difiiculty is experienced with this circuit, check the following: (It is assumed that the power supply is operative and that approximately 100-volts dc ... 2-9 uses a thyratron as the relay-control tube, we can take advantage of its characteristics and use the simpler spdt relay. ... The pictorial wiring diagram in Fig.
|Title||:||How to Build Proximity Detectors & Metal Locators|
|Author||:||John Potter Shields|