The EM84 tuning indicator, or magic eye, was used to display the optimum tuning point of a receiver, or the recording level of a tape recorder. The main benefit in reception was for FM …

Tube EM 84 or Röhre EM84 ID413, Mag. bar tuning indicator, Noval, 9 pin miniature (USA pico-9) B9A and Indication shown. Radio tubes are valves.

Under various appearances, the GDM, in essence, is just a variable frequency oscillator tuned in a wide range using additional plug-in coils, connected to an electronic voltmeter. If the coil is …

2004年9月6日 · 和欧洲的em84相同，em84是荷兰飞利浦公司1959年开发的新型调谐指示管，不同于以往的产品，这个管子的荧光屏是直接涂敷在玻璃管上的，这样会有更高的亮度和更长的寿 …

2011年10月8日 · The best tubes, with the widest range around 30dB are the EM84 and similar tubes. The earlier round eye tubes, like the 6U5 only have about a 15dB range. This …

Title: EM84 Author: La Radiotechnique Subject: SM-FP-2003-08 Created Date: 8/25/2003 1:02:01 AM

2023年11月15日 · EM84是-22v全闭合，6E2是-15v，按说6E2换上去应该是提前闭合。 不过，EM84屏极电阻是470k，6E2设计原理上是100k的。 楼主可以在470k上并个120k试试。 FM …

EM84 - oko magiczne, elektronowy wskaźnik strojenia, z triodą jako lampą sterującą i cokołem nowalowym. Luminofor w kształcie wydłużonego prostokąta naniesiony na boczną …

2014年7月9日 · What Makes a Really Good GDO? Vintage Test Gear and Workshop Equipment

The British Leak company used an EM84 indicator as a very precise tuning-indicator in their Troughline FM tuner series, by mixing the AGC voltages from the two limiter valve grids at the …