Home › Entities › vacuum_tube_model › EM84

EM84

Main use as tuning indicator in radios
class vacuum_tube_model Q1275149
Press Enter · cited answer in seconds

EM84

Summary

EM84 is a vacuum tube model[1].

Key Facts

  • EM84's image is recorded as Graetz DG 5 - Valvo EM 84-0327.jpg[2].
  • EM84's instance of is recorded as vacuum tube model[3].
  • EM84's manufacturer is recorded as Koninklijke Philips NV[4].
  • EM84's subclass of is recorded as magic eye tube[5].
  • EM84's Commons category is recorded as EM84 (vacuum tube)[6].
  • EM84's start time is recorded as +1957-00-00T00:00:00Z[7].
  • EM84's described at URL is recorded as http://frank.pocnet.net/sheets/010/e/EM84.pdf[8].
  • EM84's Google Knowledge Graph ID is recorded as /g/121bd37g[9].
  • EM84's complies with is recorded as Mullard–Philips tube designations[10].
  • EM84's Radiomuseum vacuum tube/transistor ID is recorded as em84[11].

Related Entities

Koninklijke Philips NV 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] ↑ . frank.pocnet.net. Retrieved . frank.pocnet.net. Provenance: wikidata.org.
  3. [4] ↑ . frank.pocnet.net. Retrieved . frank.pocnet.net. Provenance: wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.
  9. [10] ↑ . wikidata.org.
  10. [11] ↑ . 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). EM84. Retrieved March 19, 2026, from https://4ort.xyz/entity/em84
MLA “EM84.” 4ort.xyz Knowledge Graph, 4ort.xyz, 19 Mar. 2026, https://4ort.xyz/entity/em84.
BibTeX @misc{4ortxyz_em84_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{EM84}}, year = {2026}, url = {https://4ort.xyz/entity/em84}, note = {Accessed: 2026-03-19}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): EM84 — https://4ort.xyz/entity/em84 (retrieved 2026-03-19)

Canonical URL: https://4ort.xyz/entity/em84 · Last refreshed: