5U4G, BRIMAR, U52, BRANDED GEC-MOV, BLACK BASE, WHITE BASE PRINT, HAMMERSMITH, , VT-244, 5U4G, 5U4

5U4G, BRIMAR, U52, BRANDED GEC-MOV, BLACK BASE, WHITE BASE PRINT, HAMMERSMITH, , VT-244, 5U4G, 5U4

This Brimar branded MOV-GEC 52 valve shows excellent bright getter and tests as GOOD using my AVO VCM163 valve tester. The black base is tight to the envelope with the base carrying white inked Brimar markings  with 5U4G in an octagonal cartouche.

Device test data: Ia = 120.0mA range, GOOD  A1 78 / A2 78.

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 maximal value of which varies due to valve type and intrinsic rA.  The above device test data, shows the max current range specified and a record of the numerical reading within the GOOD range obtained.