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1U4 – Sharp-cutoff R.F. Pentode Class-A amplifier, Miniature 7-pin base, used as R.F. and I.F. amplifier in battery radio receivers, similar characteristics to 6BA6. 1U6 – Nearly identical to type 1L6 , but with a 1.4 V/25 mA filament
The "B" battery is used to provide the plate voltage. It is sometimes colloquially referred to as a "dry battery" (although there is no reason why a "wet" battery of suitable voltage could not be utilised for the purpose). The filament is primarily a heat source and therefore the "A" battery supplies significant current and rapidly discharges ...
There was a Motorola 12-volt car radio tube compliment as a Motorola TO-3 "2N-176" Power Transistor. Tung-Sol identified a device as "TS176" as a coincidence or intentionally, because both also had a Baby-Blue color on the finished material. The inventory lists indicated this product for a few years after the introduction. [44]
Later thermionic vacuum tubes, mostly miniature style, some with top cap connections for higher voltages. A vacuum tube, electron tube, [1] [2] [3] [thermionic] valve (British usage), or tube (North America) [4] is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
Some non-standard USB devices use the 5 V power supply without participating in a proper USB network, which negotiates power draw with the host interface. Examples include USB-powered keyboard lights, fans, mug coolers and heaters, battery chargers, miniature vacuum cleaners, and even miniature lava lamps. In most cases, these items contain no ...
Other power supplies for vacuum tube circuits include: LT, low tension or A battery, the supply to the filaments or heaters. Early tubes designed for battery operation had 2 volt filaments (for use with a lead-acid cell). Later tubes had 1.4 volt filaments to run from dry batteries. With the introduction of mains powered equipment, indirectly ...
In the field of oil regeneration and re-refining, vacuum pumps create a low vacuum for oil dehydration and a high vacuum for oil purification. [44] A vacuum may be used to power, or provide assistance to mechanical devices. In hybrid and diesel engine motor vehicles, a pump fitted on the engine (usually on the camshaft) is used to produce a vacuum.
12AX7 (also known as ECC83 [1]) is a miniature dual-triode vacuum tube with high voltage gain.Developed around 1946 by RCA engineers [2] in Camden, New Jersey, under developmental number A-4522, it was released for public sale under the 12AX7 identifier on September 15, 1947.