What is the primary purpose of the...

What is the primary purpose of the...

Question 1 of 270706awUc9d8pvNslzpQu47l

What is the primary purpose of the suppressor grid of a pentode?

Question 1 of 27070

Q

What is the primary purpose of the suppressor grid of a pentode?

🔍 Key Concepts

• Pentode vacuum tube structure – know what each grid does: control grid, screen grid, and suppressor grid • Secondary emission from the plate – what happens to electrons that bounce off the plate? • How the suppressor grid potential/polarity (relative to cathode and plate) affects electron flow and efficiency

💭 Think About

• Ask yourself: What specific problem did adding a third grid (suppressor) solve compared with a tetrode? • Consider which statement describes the suppressor grid’s electrical bias and its effect on secondary electrons: is it usually highly negative with respect to the plate, or near cathode potential? • Think about whether the suppressor grid’s main design goal was to reduce interelectrode capacitance, or if that role belongs more to another grid.

✅ Before You Answer

• Verify how the suppressor grid is normally connected in a pentode (to cathode or to a separate bias source?). • Check which electrode in a multi‑grid tube is primarily responsible for reducing plate-to-grid capacitance. • Confirm whether the suppressor grid’s main role is dealing with secondary emission from the plate, and how that affects gain and efficiency.