Description
This is an EIMAC A-400A radial-beam power tetrode modulator, oscillator, amplifier vacuum tube. This tube is used. The filament has been tested and is fine, and not tested further. Visibly the tube looks fine, the pictures are the actual vacuum tube. If you have a problem, send it back (you pay shipping) and I will return your $$. If you have a question please contact me.