The Telefunken Phillips Raytheon 5840W Vacuum Tube with Solder Leads is a premium USA-made vacuum tube designed for use in Telefunken AK-47 MkII and ELA M 260 microphones. This sub-miniature pentode tube offers low noise, low microphonics, and a full, even tone, making it a great choice for Class-A and Class-AB circuits. Equipped with solder leads, it requires soldering for installation in your compatible microphone..
Note:
Soldering is required to install this tube.