There are many different types of radio receiving circuits:
-Crystal (see above)
-Regenerative
-Tuned Radio Frequency (TRF)
-Superheterodyne
Modern radios are superheterodyne. The superheterodyne circuit replaced the TRF and regenerative circuits by the 1930's, and crystal sets were nearly dead until solid state radio emerged.
31π 14π
A negative voltage applied to the grid of a vacuum tube in order to assist the alteration of the flow of electrons from the cathode to the plate.
the bias used for the 201A tube is 4.5 volts when the plate is at 90 volts.
49π 50π
Law enforcement officials; police officers.
The cops busted into my house today and searched everything, only to find that they had the wrong address.
481π 188π
1.Name given to a series of civil defense sirens made by Federal Signal during the Cold War. 2. A type of high-velocity .22LR ammunition made by Remington.
1.The difference between the Thunderbolt 1000 and the 1000T is the tone produced.
2. I prefer Remington Thunderbolt ammo in my pistol.
39π 13π
A series of numbers on the numpad that when typed while holding the ALT-key will produce a symbol not normally found on the keyboard.
Some examples of alt codes:
Alt+0215 = ΓΒ
Alt+0153 = Γ’ΒΒ’
Alt+789 = ΓΒ§
Alt+0134 = Γ’ΒΒ
74π 50π
A tool used for the conveyence of pie from its resting surface to one's pie hole.
You could hardly see the guy's fork as he shoveled that pie!
26π 26π
A sniper rifle firing the .338 Lapua Magnum round (not .50 caliber, Cherokee Jack, you idiot). The most powerful weapon in the popular game, Counter Strike, which is a favorite of infantile morons and people who would thank themselves for graduating to Day of Defeat
17π 38π