Product Overview
The Ruby 6550A STR is a remake of the classic General Electric 6550A and the Ruby 6550A STR has many upgraded features to replicate the classic General Electric 6550A
The valve is manufactured with a stronger anode material with welded plates with copper support rods. Heavy grade straight glass envelope, classic triple solid getter design and metal base ring. The other nice upgrade is thick mica top supports which prevents valve rattle.
Soundwise the Ruby 6550A STR produces an extremely balanced sound with a accurate musical reproduction of all the frequencies. It is very vibrant and has a lively sound with an incredibly clear bass response. It also has plenty of distortion free performance with a very smooth treble response so is a great choice for Hi Fi as well as Bass amplifiers.
Ruby state that their 6550A STR meets the specifications of the classic USA made 6550A and can be used in any 6550 application with excellent performance.
They state that the 6550STR Ruby has outstanding stability and reliability and certainly its construction is excellent.
