1、indirectly heated
2、indirectly heated thermistor
3、Tube tetrode (directly/indirectly heated cathode).
4、Tube pentode with directly or indirectly heated cathode.
5、Drag onto the page to add a tube tetrode with directly or indirectly heated cathode.
1、indirectly heated
2、indirectly heated thermistor
3、Tube tetrode (directly/indirectly heated cathode).
4、Tube pentode with directly or indirectly heated cathode.
5、Drag onto the page to add a tube tetrode with directly or indirectly heated cathode.