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Miniature tubes, 5–30 mA current: 0A2 – 150 volts; 0B2 – 108 volts (best regulation of these three) 0C2 – 72 volts; Miniature tubes, 1–10 mA current: 85A2 – 85 volts (equivalents: 0G3, CV449, CV4048, QS83/3, QS1209) Voltage reference 1.5–3.0 mA current: 5651 – 87 volts (the most popular voltage reference ever made) 5651A – 85. ...
is the LED's forward voltage drop in volts when lit. V f {\displaystyle V_{f}} and the LED's light frequency (which we perceive as color ) increase with the band gap of the LED's materials . Consequently, V f {\displaystyle V_{f}} ranges from around 1.7 to 2.0 volts for red LEDs to around 2.8 to 4.0 volts for violet LEDs.
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.
LED tubes. LED tube is a type of LED lamp used in fluorescent tube luminaires with G5 and G13 bases to replace traditional fluorescent tubes. [1] As compared to fluorescent tubes, the most important advantages of LED tubes are energy efficiency and long service life. LED tubes are sometimes also referred to as ‘LED fluorescent tubes’.
[12] In 1939, the company still produced miniature dial lamps as the screw or bayonet type with different volts, amps, candle power, bead color, and bulb type dimensions or specifications. [13] In 1941, radio tubes continued being sold to radio broadcast stations as R. E. Carlson was vice-president in Charge of Sales during this time. [14]
The EL34 is a thermionic vacuum tube of the power pentode type. The EL34 was introduced in 1955 by Mullard, which was owned by Philips. [1] The EL34 has an octal base (indicated by the '3' in the part number) and is found mainly in the final output stages of audio amplification circuits; it was also designed to be suitable as a series regulator by virtue of its high permissible voltage between ...