This was useful for things such as FM radios where one side might show signal strength and the other would show multipath. Have you rated this thread best post? The EM8x series was all 9-pin miniature. Type EM84 was first introduced in Some models have a pentode. Some others are very expensive, especially the later EMMxxx as well datwsheet rare old ones. Other tuning indicators with end windows would have round displays with variable percentages of the circumference illuminated.

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Dual sensitivity, dual control no amplifier. Inlow to high, EM will send a string ID code. The 6E5 uses a plain triode, while the 6G5 has a variable-mu triode to let it handle larger voltage swings.

The 6AB5 and 6N5 were intended datashert battery radios, having lower filament consumption. Note that most of the miniature EMxxxs are side-view, while all the pres types are viewed from the end. The EM84 tuning indicator, or magic eye, was used to display the optimum tuning point of a receiver, or the recording level of datasheeh tape recorder.

As the signal strength increased the bars would elongate and eventually overlap to form a bright green region. Dual bargraph side view Bulbus Noval B9A. Previous 1 2 3 Next. Either an LM simple types or a PIC cpu complex patterns and variations of brightness of shadow and overlap can be used. Any of the datassheet can be looked up on the tube database and Members can see which models of Radio, Tape recorder or Test instrument used them. This makes the bars quite small but makes the package smaller.

Data Input from system to EM See the tube page. Magic Eye Patterns The original types are the 6E5 family inDomestic radios from Dual sensitivity, one shadow moves more. The mica sheets holding the electrodes are clamped to the side of the anode. Possibly put a 4. Side view single long vertical bar. Growing Exclamation mark, Battery Valve Radio. Most were developed by Telefunken in the first half of s.

The DM21 is older Octal 1. EM84 page 1 2 3 sheet 1 2 FP date Rectanglar with two shadows, center square. The EM8x series was all 9-pin miniature. Related Posts.



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The EAM86 are relatedto EM84s, except the bars are horizontal to the base wrapping around the tube barrel partlyrather than vertical. To thank the Author because you find the post helpful or well done. This makes the bars quite small but makes the package smaller. The main benefit in reception was for FM radio where the exact tuning point was harder to determine than for AM.

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