If It’s Valves You’ve Come For…

6 08 2008

The 6BQ5, also known by it’s European designation of EL-84, is renowned as one of the most prized tubes among amp designers and it’s characteristically sweet tone is the foundation of the Skylark’s sound. The other valves in this amp aren’t so familiar. The 6EU7, which Gibson used a fair bit in different 1960’s tube amps, is a low noise alternative to the more commonplace 12AX7 but the two preamp valves are of equal gain values and overall are ,very similar. The 6C4 tube was used in many applications, such as organs, ham radios and even TVs but Gibson used them in amps as either rectifiers or in this case, a phase inverter.

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