All About Magic Eye Tubes A magic eye tube is an electronic vacuum tube that provides visual indication, usually in the form of green light, on an area called the targetinside the tube. The target is partially illuminated with the exception of the shadowarea, which varies in size and shape depending on the signal applied to the tube. FC's Fluorescent Magic Eye Tubes solorb FC's Fluorescent Magic Eye Tubes (C) G. Forrest Cook 2008 2019 Introduction Here is a collection of information on a variety of fluorescent magic eye vacuum tubes that I assembled while designing the Hammonator guitar amp project and the Magic Eye Tube Wavemeter.The emphasis of this page is to have a collection of information for those who wish to design circuits that use this type of tube. Tuning Eye radioremembered.org Some sets use an electron ray (tuning magic eye) tube to aid in tuning the set exactly to the station. The eye tube gives a visual indication of when the receiver is properly tuned to the signal being received. Theory of Operation: Figure 1 is a diagram which shows the internal construction of the electron ray tube. Magic Eye Tube Submitted by BayLab for the Instructables ... Magic Eye Tube Submitted by BayLab for the Instructables Sponsorship Program: A Magic Eye tube is an old device that was originally used to indicate how well a radio was tuned to a specific station. In this Instructable, you'll learn how to Magic Eye Tubes work, where to get them, the different kinds of tubes, and how to us... Magic eye working circuit Magic eye working circuit Abhigyan Swaroop. Loading... Unsubscribe from Abhigyan Swaroop? ... Universal Magic Eye Tube VU Meter Bausatz Duration: 3:43. Jürgen Grau 198,279 views. The Magic Eye – VU Indicator using vacuum tube Hi guys, today we are going to be presenting a variation of a vacuum tube and it’s applications. This is the EM80 (or alternatively EM84) magic eye vacuum tube. Historically it found use in early radio receivers, where frequency stability and proper tuning was an issue. Being able to visually show ... Magic eye tube A magic eye tube or tuning indicator, in technical literature called an electron ray indicator tube, is a vacuum tube which gives a visual indication of the amplitude of an electronic signal, such as an audio output, radio frequency signal strength, or other functions. DIYcrap: Magic Eye Tube 6e5c blogspot I could not find a schematic, but drew the circuit diagram based on the PCB on a piece of paper in order to understand the circuit. From my understanding it is a basic buffer audio amplifier followed by a DC coupled stage that rectifies the negative half cycle to provide the negative DC to drive the Magic Eye Tube. Magic eye circuits for 6E5 Google Groups The 6E5 was the original "eye" tube, more properly known as "electron ray indicator", tube. Although I've heard them being referred to as, eye tubes, tuning indicators, magic eye tubes, bulls eyes, target indicators, and even bow tie tubes. The 6E5 came out by RCA in or around the late 1930's perhaps the early 1940;s. Adding a Magic Eye to a Hallicrafters S 20R antique radio Adding a Magic Eye to a Hallicrafters S 20R. ... Although the magic eye circuit is simple, this project requires connecting to a high voltage current source within the chassis of an antique tube radio. ... To tune any station correctly, simply tune the receiver for the narrowest deflection of the magic eye tube. Since this tube must be located ... magic eye weirdness SOLVED!! Antique Radios A mode switch operated by the band select pushbutton connects the eye tube grid to the active circuit. A divider resistor in the line that feeds the rectified FM signal voltage to the eye tube may have opened up, causing essentially "on off" operation of the display tube. Solid State Replacement for 6U5 & 6E5 Magic Eye Tubes Power is derived from the radio’s tube filament supply (pins 1 and 6 on the tube base). It should be noted that this circuit uses a positive ground, and assumes that one side of the filament is grounded, and that the eye tube cathode is also grounded. This is generally the case in most receivers using eye tubes. VU meter with EM84 tube – AntiMath The magic eye tubes are just small CRT derivations, usually they also have a triode built in, as an amplifier. I had two EM84 laying around for some time ( EM84 are cheap and easy to find, mostly on eBay ), and as I was planning to start an all tube stereo amplifier, it made perfect sense to use magic eye tubes as vu meters, although EM84 can ... "Eye" Tube Hints antiqueradios "EYE" TUBE HINTS by Norman R. Leal. Good eye tubes such as 6E5 and 6U5 are getting harder to find. Many of the old ones still have filaments but have lost most of their green glow. You can increase the green by a slight modification of the circuit. These tubes were originally specified for operation on 250 volts. Magic Eye Projects A one tube radio receiver using a magic eye tube. I was recently asked by a reader and amateur radio operator from Brazil if I had a circuit for a one tube receiver using a magic eye tube. I did find such an article online called "Build the Cyclops" which seemed to be exactly what he was looking for.

magic eye tube circuit Gallery


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