CV2175 S-band TB cell

This device measures 66mm long, 5mm across the body and 11mm across the head.

This cell is rated at a mean switched RF power of 2MW. It is filled with Brazilian rock crystal and has a gas filling of 80% neon and 20% helium, and an additional 0.4% of argon at a pressure of 40mm Hg. Yes that's more than 100% but the spec says so!