Discussion Overview
The discussion revolves around identifying the connections for the Eimac type 8533 planar triode tube, specifically the filament, cathode, grid, and anode (plate) connections. Participants explore the challenges of working with a tube that has no pins, as the connections are made directly to the metal and ceramic housing.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant seeks help in identifying the connections for the Eimac type 8533 planar triode tube, noting the absence of pins and reliance on the data sheet.
- Another participant suggests checking tube-tester manuals and experimenting with current limiting resistors to identify connections without damaging the tube.
- It is noted that the tube housing is metal and ceramic, complicating the identification of the connections.
- One participant inquires about the intended use of the triode, which is revealed to be for switching high voltage at a specific frequency.
- There is a discussion about the suitability of IGBT devices for the application, with concerns raised about their switching speed compared to the triode.
- A participant recalls the order of connections as filament, cathode, grid, and plate, suggesting that the plate connection has the largest separation from the others.
- Another participant mentions contacting the ARRL for additional information on the tube and socket availability.
- The original poster later confirms that they successfully identified the connections and powered the tube, indicating it functions properly.
Areas of Agreement / Disagreement
While there is a general agreement on the identification of the connections by the end of the discussion, the initial uncertainty and various suggestions indicate that multiple views and approaches were considered throughout the thread.
Contextual Notes
Participants expressed uncertainty regarding the exact identification of the connections initially, and there was a reliance on experimentation and external resources for clarification.
Who May Find This Useful
Individuals working with vintage or specialized vacuum tubes, particularly those interested in high-voltage applications or custom tube fixtures.