The RK-715 is a power tetrode of the late 1940s and is believed to be an RK-715.
This valve is unusual in that it features four flat oval cathodes side by side. The control grid appears to be gold plated and is stretched in front of the cathodes on notched rod supports. The screen grid is a flattened helix. The anode is supported on ceramic insulators and connected to the top cap. This suggests a high anode voltage. The anode itself is of substantial construction 1 mm thick, and is blackened to radiate heat. The four stud pins of the base are suited to sprung connectors.
The wide glass tube envelope is 60 mm in diameter and, excluding the base pins, is 136 mm tall.
This exhibit was last updated on 19 January 2003
This valve is unusual in that it features four flat oval cathodes side by side. The control grid appears to be gold plated and is stretched in front of the cathodes on notched rod supports. The screen grid is a flattened helix. The anode is supported on ceramic insulators and connected to the top cap. This suggests a high anode voltage. The anode itself is of substantial construction 1 mm thick, and is blackened to radiate heat. The four stud pins of the base are suited to sprung connectors.
The wide glass tube envelope is 60 mm in diameter and, excluding the base pins, is 136 mm tall.
This exhibit was last updated on 19 January 2003
This exhibit was last updated on 19 January 2003
This exhibit was last updated on 19 January 2003 |