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CV574 / VT126B / 6X5GT/G fullwave rectifier

Size This valve measures 88x30mm overall and has an octal base.


The base of the valve shown on the right is marked GPO Batch Sampled 9083. The prototype is 6X5GT

Heater voltage 6.3V
Heater current 600mA
Max applied RMS voltage 325V
Max working PIV 900V
Max no load PIV 1100V
Max mean DC rectified current 70mA
Max peak anode current 210mA
Max reservoir capacitor 16µF
Max limiting resistance per anode 150 ohms
Max DC heater-cathode voltage 450V


Pin Function
1 n/c
2 Heater
3 Anode 1
4 no pin
5 Anode 2
6 no pin
7 Heater
8 Cathode


Above: GP batch sampled CV574



The CV574 / 6X5GT/G / VT126B shown on the right has the following information marked on two sides of its box. First it has the JAN markings CRC 6X5 GT/G and VT126B, also carried on the base of the valve. It also carries the UK markings CV574, the AM ref, and LM J. These are carried on the glass of the valve. Referring to the information in K1001 this would appear to indicate a manufacturing date of Dec 1955, yet the Accepted date on the other side of the box is Nov 1944. The J could indicate the valve being made by a company called "Radar Electronic Equipment" (or STC if prior to 1946). Alternatively the J could indicate the valve being made to JAN standards, but in that case the J ought to be before the '/'. In additon the base of the valve carries the code H5E.

Box side 1 Box side 2

CV574 CV574 / 6X5GT/G / VT126B