| 摘要 |
A K-G1 spacing apparatus provides for spacing the dispenser cathode of a CRT electron gun a desired distance from an adjacent apertured grid electrode known as "G1." A probe has an outer shaft with a shoulder for registering with the G1 electrode. The probe includes an inner shaft having a tip on one end for contacting the face of the cathode, and at the opposite end, a linear velocity differential transformer (LVDT). When the cathode contacts the tip of the probe, the LVDT produces an electrical signal which is indicated on a calibrated column, and which denotes the location of the cathode face relative to the G1 electrode. When the desired K-G1 spacing has been attained, the cathode is fixed in permanent relationship with the G1 electrode.
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