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BVA172Sensibly equivalent¶ to:See also:
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Here we have a UK WWII utility valve. It was made available for civilian radio receivers. Commercially the design was the Mazda TP25 and the 2 in the code identifies this as a Mazda product.The Mazda TP25 is a triode pentode frequency changer for battery operated broadcast receivers. The special feature of this self oscillating mixer is the low filament consumption.![](../pics/aaq0231a.jpg)
The reverse is plain zinc paint.The classic envelope is 32 mm in diameter and, excluding the MO base pins, is 92 mm tall.References: Data-sheet, 1040 & 1043. Type BVA172 was first introduced in 1938. See also 1938 adverts. |
Pin Connections
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | tc | ![](../static/key.gif) f- | nc | a | a(t) | g1(t),g3 | m | g2 | f+ | g1 |
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Absolute Maximum Operating Conditions¶
| Vh | Ah | Va | Vs | Vg | mAa | mAs | ra | gm | ![](../static/pdflogo.gif)
| 2.0 | 0.2 | 120 | 60 | -1.5 | 0.58 | 0.92 | 1.3M | 0.26 |
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Absolute Maximum Operating Conditions¶
| Va | mAa | ![](../static/key.gif)
| 80 | 2.5 |
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Updated January 03, 2022.
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