9,280
edits
724-A: Difference between revisions
Jump to navigation
Jump to search
no edit summary
(→Photos) |
No edit summary |
||
| Line 21: | Line 21: | ||
The Type 724-A is supplied as a collection of calibrated components sharing the same serial number. That is the capacitor, all the inductors, and calibration charts must have the same serial number to achieve the stated accuracy. The 724-A replaced the [[224-A]] Wavemeter with improved coils and a galvanometer replacing the thermocouple type indicator. The wavemeter is furnished with a wooden storage case, fitted with lock and carrying handle. This case has compartments for holding the capacitor, inductors, and calibration charts. The 724-A uses a 1G4GT/G Triode vacuum tube, resulting in the need for a 1.5 V battery for the heater. | The Type 724-A is supplied as a collection of calibrated components sharing the same serial number. That is the capacitor, all the inductors, and calibration charts must have the same serial number to achieve the stated accuracy. The 724-A replaced the [[224-A]] Wavemeter with improved coils and a galvanometer replacing the thermocouple type indicator. The wavemeter is furnished with a wooden storage case, fitted with lock and carrying handle. This case has compartments for holding the capacitor, inductors, and calibration charts. The 724-A uses a 1G4GT/G Triode vacuum tube, resulting in the need for a 1.5 V battery for the heater. | ||
Note: The instrument used in this article uses a 1LE3 loctal battery triode. It appears to be a production change. | |||
==Specifications== | ==Specifications== | ||