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RG1-240ASensibly equivalent¶ to:See also:
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The RG1-240A is a high voltage half wave rectifier. To deliver DC power to medium sized equipment, several would be operated together. Maybe six on a three phase supply.Mercury vapour rectifiers of the GU1 class were introduced in the mid-1930s but, despite filling a real need, they became unpopular because they were troublesome in service. The RG1-240 was introduced in 1938 and the A variant some time later.It took valve designers an amazingly long time to learn that the oxide-coated filament had to be shielded from the anode, that the anode-shield gap needed to be uniform and smoothly profiled, and that use of a thermal delay switch (e.g. DLS10) was essential. The RG1-240A is a later rectifier exemplifying these features. It was successful and widely used. Exhibit NU8 (equal to RG1-125) exemplifies an earlier, much less successful design which the Navy nevertheless went on using for years.The maximum reservoir capacitor had to be limited to 5 µF.The classic envelope is 44 mm in diameter and, excluding the B4 base pins, is 117 mm tall.References: Data-sheet, 1040 & 1043. Type RG1-240A was first introduced in 1938. See also 1938 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 |  nc | nc | f | f |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | mAa | 
| 4.0 | 2.7 | 2,220 | 250 |
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PDF scanned from an original document held by the museum |
Updated January 07, 2022.
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