This type of tube, IN-7, has 2 variants: IN-7B and IN-7A. Anyway, this tube has a set of symbols different from those two. It contains same unit prefix symbols, for example, milli-, kilo-, mega- and same electrical units symbols, for example, ampere, volts and ohm. Also, it has +, – and ~. The dimensions of the tube, however, are the same as IN-4, IN-7B, IN-7A.
IMAGES
DATA
| description | unit | value |
|---|---|---|
| type | - | IN-7 |
| brand | - | Gazotron, Rovno |
| view | - | top view |
| symbols | - | +, -, ~, A, V, M, m, k, Ω, Π |
| symbol height | mm | 16 |
| dimensions | mm | ⌀ 30 x 41 |
| pin diameter | mm | 1 |
| startup voltage | V | 170 |
| maintaining voltage | V | 160 |
| cathode current | mA | 2.5 |
| durability | h | 400 |
| base | - | RSH31 |
| socket or alternative | - | PL31 (ПЛ31), PL31p (ПЛ31п), PL31-2V (ПЛ31-2B), 1 mm pins |
