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2. Constant-voltage speaker system - Wikipedia

   en.wikipedia.org/wiki/Constant-voltage_speaker...

   Constant-voltage speaker systems are also commonly referred to as 25-, 70-, 70.7-, 100 or 210-volt speaker systems; distributed speaker systems; or high-impedance speaker systems. In Canada and the US, they are most commonly referred to as 70-volt speakers. In Europe, the 100 V system is the most widespread, with amplifier and speaker products ...

3. Electronic symbol - Wikipedia

   en.wikipedia.org/wiki/Electronic_symbol

   Wire crossover symbols for circuit diagrams. The CAD symbol for insulated crossing wires is the same as the older, non-CAD symbol for non-insulated crossing wires. To avoid confusion, the wire "jump" (semi-circle) symbol for insulated wires in non-CAD schematics is recommended (as opposed to using the CAD-style symbol for no connection), so as to avoid confusion with the original, older style ...

4. KT88 - Wikipedia

   en.wikipedia.org/wiki/KT88

   The transmitting tubes TT21 and TT22 have almost identical transfer characteristics to KT88 but a different pinout, and by virtue of their anode being connected to the top cap have a higher plate voltage rating (1.25 kilovolt) and a higher power output capability of 200 watts in class AB1 push–pull.

5. EL84 - Wikipedia

   en.wikipedia.org/wiki/EL84

   200 V g2 200 V kf: Maximum Power Ratings 12 W a 1.75 W g2 (Philips) or 2 W g2 (RCA, Sylvania) 12 W a (Philips) or 14 W a (RCA) 1.75 W g2 (Philips) or 2.1 W g2 (RCA, Sylvania) Maximum Cathode Current, I k: 65 mA: 100 mA: Transconductance 11.3 mA/V: 11.0 mA/V: Internal (plate) resistance, R i: 38 kΩ: 26 kΩ: Test Conditions 250 V a 250 V g2 I a ...

6. Audio power - Wikipedia

   en.wikipedia.org/wiki/Audio_power

   For most audio applications more power is needed at low frequencies. This requires a high-power amplifier for low frequencies (e.g., 200 watts for 20–200 Hz band), lower power amplifier for the midrange (e.g., 50 watts for 200 to 1000 Hz), and even less the high end (e.g. 5 watts for 1000–20000 Hz).

7. 807 (vacuum tube) - Wikipedia

   en.wikipedia.org/wiki/807_(vacuum_tube)

   The screen voltage is the same, at 300, but its dissipation rises to 3.5 watts. 37 watts of R.F. power is produced from 220 mW of drive but only a 50% duty cycle is allowed. The maximum allowable negative control grid, g1 excursion allowable is -200 volts and average control grid current is 5mA in both A.M. and CW modes. [ 1 ]

8. This Olympian's Shift Towards Sobriety Helped Her Reach Her ...

   www.aol.com/olympians-shift-towards-sobriety...

   "Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Sarah MacKay Robinson recalls the exact moment she started questioning the role that alcohol played ...

9. Common base - Wikipedia

   en.wikipedia.org/wiki/Common_base

   For R S values in the vicinity of r E the amplifier is transitional between voltage amplifier and current buffer. For R S ≫ r E the driver representation as a Thévenin source should be replaced by representation with a Norton source. The common base circuit stops behaving like a voltage amplifier and behaves like a current follower, as ...