A grid used in tetrode and pentode vacuum tubes that reduces the electrostatic influence of the plate on the control grid. A fixed bias voltage is applied to the screen grid, which sits between the ...

A large glass G-shaped tube with a metal pin and blade base, metal top cap, contact on one side arm and braided metal lead on the opposite side. Donor’s card reads: “Screen grid power amplifier made ...

In the Feb. 1 issue, we discussed what you’ll find inside an electron tube and its basic principles of operation. Now let’s talk about how that tube works in an FM radio transmitter. The key to ...