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EM4

class vacuum_tube_model Q9249875
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EM4

Summary

EM4 is a vacuum tube model[1].

Key Facts

  • EM4's image is recorded as Lampa EM4 TELAM.jpg[2].
  • EM4's instance of is recorded as vacuum tube model[3].
  • EM4's subclass of is recorded as magic eye tube[4].
  • EM4's Commons category is recorded as EM4 (vacuum tube)[5].
  • EM4's start time is recorded as +1938-00-00T00:00:00Z[6].
  • EM4's complies with is recorded as Mullard–Philips tube designations[7].
  • EM4's Radiomuseum vacuum tube/transistor ID is recorded as em4[8].

Related Entities

magic eye tube

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.

Class ancestry

  1. [1] ↑ . Wikidata. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). EM4. Retrieved March 19, 2026, from https://4ort.xyz/entity/em4
MLA “EM4.” 4ort.xyz Knowledge Graph, 4ort.xyz, 19 Mar. 2026, https://4ort.xyz/entity/em4.
BibTeX @misc{4ortxyz_em4_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{EM4}}, year = {2026}, url = {https://4ort.xyz/entity/em4}, note = {Accessed: 2026-03-19}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): EM4 — https://4ort.xyz/entity/em4 (retrieved 2026-03-19)

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