The MU-20 from Daven Radio Corporation is not detailed in Tyne1047 and the box gives the information that is currently available.The application given is as a voltage amplifier with resistance capacity coupling. The filament rating suggests a dull emitter using a thoriated tungsten wire. The extra gain over the original bright emitters would enable the move away from transformer interstage coupling to a more lossy R-C connection.
The original box with basic application data. Thanks to Joe Gruber for sending the images.The envelope is mm in diameter and, excluding the UX4 base pins, is mm tall.References: Original Box. |
Pin Connections
| 1 | 2 | 3 | 4 |  a | g1 | f | f |
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Absolute Maximum Operating Conditions¶
| Vh | Ah |
| 6.0 | 0.25 |
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Updated July 06, 2021.
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