5U4G, RCA , SMOOTH CHARCOAL ANODE, VT-244, 5U4
5U4G, RCA , SMOOTH CHARCOAL ANODE, VT-244, 5U4
This RCA tall form ST envelope 5U4G valve shows excellent bright getter and tests as EXCELLENT using my AVO VCM163 valve tester. The black base is tight to the envelope and carries a slightly faded white ink 5U4G legend in addition to the etched octagonal cartouche on the envelope.
Device test data: Ia = 120.0mA range, GOOD A1 61/ A2 63.
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.