SED 6550C - High Performance Audio Beam Power Pentode

The SED 6550C is a glass envelope beam power pentode. It is intended for ultra linear audio frequency power amplification service. Close manufacturing specification tolerances and improved processing provide improved reliability and superior sonic performance. The new SED 6550C features: increased peak cathode emission from new cathode materials; stable operation from extended processing and ageing; gold-plated grid; new tri-plate anode; single-piece beam forming electrode; precise grid/screen alignment; improved vacuum processing; and comprehensivestatic and audio amplifier testing before and after ageing.

The SED 6550C is manufactured in the SED factory in St Petersburg, Russia, and is designed to be a direct replacement for any 6550.


Outline Drawing


Typical Operation Class A, (single tube)

Typical Performance Curves