GZ34, Mullard, Fat Base, f32 B4C, Blackburn 1954 manufacture

 GZ34, Mullard, Fat Base, f31 B1C, Blackburn 1951 manufacture 

Device test data: Ia = 120.0mA range, GOOD  A1 98/ A2 98.

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 on our VCM163