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A50ASensibly equivalent¶ to:
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The A50A branded as Ever Ready was made for them by Mullard and is a Mullard Type SP4. When originally introduced it was fitted with a B5 base cap.The A50A is an RF pentode.The exhibit is new and was donated in its original box. It was expensive as the box is priced at 20/7 including purchase tax.The classic envelope is 47 mm in diameter and, excluding the B7 base pins, is 125 mm tall.References: Data-sheet 1024 & 1043. Type A50A was first introduced in 1935. See also 1935 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | tc |  M | g1 | g3 | h | h | k | g2 | a |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | 
| 4.0 | 1.0 | 200 | 100 | -2 | 3.0 | 1.1 | 2.2M | 2.3 |
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Thanks to Andy Cowley for supplying the above PDF datasheet. |
Updated July 30, 2015.
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