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U78, GEC 6X4, WHITE PRINT, DECEMBER 1951 BRITISH MANUFACTURE
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U78, GEC 6X4, WHITE PRINT, DECEMBER 1951 BRITISH MANUFACTURE U78, GEC 6X4, WHITE PRINT, DECEMBER 1951 BRITISH MANUFACTURE

U78, GEC 6X4, WHITE PRINT, DECEMBER 1951 BRITISH MANUFACTURE

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U78, MARCONI, 6X4, WHITE PRINT, DECEMBER 1960 BRITISH MANUFACTURE

Device test data: Ia = 30.0mA range, GOOD  A1 75 / A2 75.

We test our rectifiers using a calibrated and standardised AVO VCM163 on the specified range.  This VCM gives a qualitative estimation of emission as you can see from the photo, the GOOD range bar runs below the numerical uA/Ig scale with the GOOD range between 51 - 100.  The above device test data, shows the max current range specified and a record of the numerical reading within the GOOD range obtained.

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