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← Find a valve socketEimac special four-contact socket interface (5000B)
Mechanical data, images and references from the EnryLab archive.
Key specifications
- Reference code
- EIMAC-5000B-4
- Contact positions
- 4
Mechanical dimensions
All linear dimensions are in millimetres and describe the valve base and its pins. They are not socket-hole diameters.
The pin circle passes through the pin centres. Pin spacing is the straight-line distance between adjacent centres. ≈ denotes a value calculated from nominal geometry; ± denotes a tolerance, parentheses show limits and ≤ denotes a maximum.
| Dimension | Value (mm) | Detail |
|---|---|---|
| Valve base | ||
| Pin diameter | 6.3246 ± 0.0508 | Dimension shown in the drawingView detail |
| Lateral-pair centre spacing | 20.6375 | Dimension shown in the drawingView detail |
| Axial-pair centre spacing | 17.4625 | Dimension shown in the drawingView detail |
| Pin length | 16.271875–17.065625 | Dimension shown in the drawingView detail |
| Base-body diameter | ≤ 45.24375 | Dimension shown in the drawingView detail |
| Base-body height | 22.225 | Dimension shown in the drawingView detail |
In depth
The 5000B family used by 152TH and 152TL has four lower contacts in a rectangle. Side or top connectors are separate valve connections and do not increase the lower socket-position count.
Johnson socket 124-213 was specified for 152TH in 1965. Both 152TH and 152TL use base 5000B: the lower layout and specified receiver define the mechanical grouping, rather than electrical equivalence alone.
This construction remains separate from large four-pin bayonet bases and other Eimac products. Male-pin dimensions are not female-hole tolerances; external connection selection requires the specific valve data.
The four 5000B pins are 6.3246 ±0.0508 mm in diameter. Their centre rectangle is 20.6375 mm horizontally and 17.4625 mm vertically; terminal length is 16.271875–17.065625 mm.
The base body is 22.225 mm high with a maximum diameter of 45.24375 mm. These dimensions belong to male construction 5000B, not the inside diameters of Johnson 124-213 spring contacts.
The four bottom terminals carry the filament in two pairs; grid and anode have separate connections. Four filament pins are therefore an interface characteristic, while the triode’s electrode count differs from the number of lower socket positions.
Technical drawings
The drawings show orientation and geometry. Links beside the dimensions open the available detail.
Photos and examples
No photos are available for this socket yet.
Related valves in the archive
Total linked designations: 2