The Tungsram HP4115 is a vari-μ RF pentode that was made with both B5 and B7 base caps. The valve has a short grid base and the control grid bias range is -1.5 to -12 Volts.
The B5 base pins.Thanks to Mark Mallison for sending the image.The classic envelope is 50 mm in diameter, and excluding the B5 base pins is 141 mm tall.Reference: 1043. Type HP4115 was first introduced in 1935. See also 1935 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | tc |  g2 | g1 | h | h | k,g3 | a |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm |
| 4.0 | 1.0 | 200 | 100 | -1.5 | 4.3 | 1.5 | 1.4M | 3.2 |
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Updated October 13, 2019.
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