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2. Magic eye tube - Wikipedia

   en.wikipedia.org/wiki/Magic_eye_tube

   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 ...

3. List of Mullard–Philips vacuum tubes - Wikipedia

   en.wikipedia.org/wiki/List_of_Mullard–Philips...

   EM2 – Top-view, "Magic Eye"-type tuning indicator; has a 6.3 V/200 mA heater and was therefore marketed as C/EM2; identical AM2 except for heater ratings EM4 – Dual-sensitivity, top-view, "Magic Eye"-type tuning indicator, EM34 with a side-contact 8 Base

4. Circuital - Wikipedia

   en.wikipedia.org/wiki/Circuital

   The album cover is a close-up shot of a Magic eye tube fitted onto vintage radio receivers from the 1930s. The purpose of tuning eyes in these radio sets was to help tune a station in at its strongest point on the dial. So when the perfect frequency was found, the Magic Tuning Eye would be lit up all the way (like the album cover's).

5. Russian tube designations - Wikipedia

   en.wikipedia.org/wiki/Russian_tube_designations

   V (Russian: В) – Vacuum tube with secondary emission. L (Russian: Л) – Nonode. 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.

6. Gonset Communicator - Wikipedia

   en.wikipedia.org/wiki/Gonset_Communicator

   Early models had a magic eye tube tuning indicator in front. The configuration earned them the name "Gooney Box." The radios could operate from 110 volt AC mains, or 6 or 12 volt DC from a car battery. A simple whip antenna could be plugged into the antenna connector on top.

7. List of vacuum tubes - Wikipedia

   en.wikipedia.org/wiki/List_of_vacuum_tubes

   For transmitting tubes in this system, the second element starts with a dash, a sequentially assigned number, then an optional letter specifying cooling method. For phototubes and photomultipliers, the second element is a sequential number and then a letter code identifying vacuum or gas fill and the type of cathode.

8. Is It a Cowlick or Balding? How to Tell the Difference - AOL

   www.aol.com/cowlick-balding-tell-difference...

   Cowlick vs. Balding: Key Differences. A cowlick differs from a bald spot in a couple key ways.. First, a cowlick is a natural, normal feature of your scalp that occurs as a result of your genes.

9. AN/ARC-5 - Wikipedia

   en.wikipedia.org/wiki/AN/ARC-5

   Transmitters use four tubes: 1626 oscillator, two 1625 finals, and 1629 magic-eye tuning. The latter allows a check of the dial calibration by giving a visual indication, viewable by raising a small cover, when the oscillator's frequency matches that of an internal crystal.