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The magic eye (also called a cat's eye, or tuning eye in North America) is a specific type of such a tube with a circular display similar to the EM34 illustrated. Its first broad application was as a tuning indicator in radio receivers , to give an indication of the relative strength of the received radio signal, to show when a radio station ...
6M2 (6CD7/EM34) – Dual-sensitivity tuning indicator, octal base 6P15 (6BQ5/ EL84 ) – Power pentode, noval base 10PL12 (50BM8/UCL82) – Triode/power pentode, noval base
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 ...
Ye (Russian: Е) – Magic eye tube (e.g. used as a tuning indicator). U (Russian: У ) – Power triode (was soon deprecated). The 3rd element is a number – a series designator that differentiates between different devices of the same type.
Later again the charge was exploded by paper tubes (sometimes called Dutch tubes) filled with powder and placed in the vent and ignited by a port-fire. Friction primers (sometimes called friction tubes ) were used in the later black powder era, while in the latest patterns percussion or electric tubes are employed.
This is a list of European Mullard–Philips vacuum tubes and their American equivalents. Most post-war European thermionic valve (vacuum tube) manufacturers have used the Mullard–Philips tube designation naming scheme.
Marantz 2050L AM/FM stereo tuner (USA; 1978-1980) [1]. In electronics and radio, a tuner is a type of receiver subsystem that receives RF transmissions, such as AM or FM broadcasts, and converts the selected carrier frequency into a form suitable for further processing or output, such as to an amplifier or loudspeaker.
The rest of the tuning stop is tuned to itself, in octaves. That is, tenor C is tuned to middle C, tenor D to middle D, and so forth. Once the tuning stop is fully in tune with itself, the rest of the stops are tuned. Most stops are tuned to the tuning stop, though some stops are more easily tuned to stops other than a 4 ft Principal.