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MAGIC EYE: EM34, CV394, 64ME, 6CD7, 6M2

 The EM34, first introduced in 1946  is a dual shadow magic eye tuning indicator.   Mullard describe this device as suited to both receiver tuning indication and test equipment null indications.  The grid voltage change is 0 - 5 volts and 0 - 16 volts.  

These devices are hard to find today having good emissive properties, all examples offered for sale will be shown by a lit shot with the device photographed on test on our AVO VCM163 with the correct anode load (1M Ohm).