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The EF86 is a high transconductance sharp cutoff pentode vacuum tube with Noval (B9A) base for audio-frequency applications.
The analysis highlights Characters, Characteristics and Overview as prominent areas in the source structure around EF86.
Source areas are shown by the number of related topics found in each part of the analysis. Use smaller areas too: they can reveal specialized angles and content gaps.
Smaller areas are not necessarily less important. They contain fewer connections in this analysis and can be useful for finding specialized angles or coverage gaps.
High-confidence facts extracted from structured source data. Use them as anchors for further research.
Browse the complete topic structure, not only the most central items. Less prominent entities and concepts can reveal missing angles, specialized context and useful research gaps. Each item opens a new analysis centered on that subject.
Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
The extracted context around EF86 shows recurring relationship patterns in the source. For example, EF86 → Archived, EF36, EF37, EF37A, EF86Datasheet, National Valve MuseumTDSL Tube, National Valve MuseumThe Mullard, November, Thorn/Mazda, Tubeworld, Wayback MachineMullard's EF86 Another extracted example is EF86 → 185 (45dB). Use these groups to spot repeated connection types before inspecting the individual relationships.
Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.
tube base microphony pentode applications noise similar ma b9a gain used vacuum produced many variant audio type transconductance mullard cutoff
TTTA extracted 26 structured relationships around EF86. Examples in this analysis include EF86 → Amplification factor → 185 (45dB) and EF86 → Cathode type → Indirectly heated. The table shows each extracted connection, where it came from and its confidence.
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| EF86 | Amplification factor | 185 (45dB) | 1.00 | infobox |
| EF86 | Cathode type | Indirectly heated | 1.00 | infobox |
| EF86 | Classification | Pentode | 1.00 | infobox |
| EF86 | Filament current | 200 mA | 1.00 | infobox |
| EF86 | Filament voltage: | 6.3 V RMS or dc | 1.00 | infobox |
| EF86 | Max current | 6 mA | 1.00 | infobox |
| EF86 | Max dissipation Watts | 1 W | 1.00 | infobox |
| EF86 | Screen voltage | 200 V | 1.00 | infobox |
| EF86 | Service | Audio frequency | 1.00 | infobox |
| EF86 | is a | high transconductance sharp cutoff pentode vacuum tube with Noval | 0.90 | text |
| tape recorder input stages | instance of | Although used in circuits | 0.80 | text |
| instrument amplifiers | instance of | Although used in circuits | 0.80 | text |
The concept neighborhoods around EF86 bring nearby vocabulary together. In this analysis, examples include Tube, Cutoff and Vacuum. Use the clusters to find adjacent concepts and terminology that may deserve separate research.
For EF86, one of the stronger structural bridges in this analysis connects EF86 with Overview. Bridges highlight paths between different parts of the map and can reveal research angles that are easy to miss in a flat list.
TTTA analyzes the structure around EF86 to surface related topics, entities, relationships, concept neighborhoods and bridge connections. Use the map to explore areas such as Characters, Characteristics & Overview, including less central topics that may reveal useful research gaps. Automatically extracted connections are research leads rather than rewritten encyclopedia content.
Source: Wikipedia — EF86 · EN edition · Analysis: TopicsToTalkAbout