354V Mullard early 1930s balloon and 354V Mullard ST mesh plate! 41MTL AC/HL HL4

Description

The 354V is a Mullard design valve and was made both as detector and audio use. We have two pairs of the same valve; on the left a pair of balloon 354V very rare with grilled plate and on the right the ST fat shape with mesh plate. The 354V works at 250Volts anode with a mutual conductance of 3.4 mA/V.

You can also notice the metalized paint on the 354V valves.

Dated from 1929 onward.

Both pairs 354V valves successfully tested with full emission and perfect working order.