Amps & Effects Ruby Amp Parts | Ruby Ecc83 (12Ax7A) Ruby Tube Preamp Tube

Ruby Exclusive With Large Bottle, Gold-Plated Grid, And Extra Internal Anchoring. All Ruby Output Tubes Are Labeled On The Base With The Exact Matching Measurements For Plate Current And Transconductance. By Matching These Parameters, Optimal Performance And Long Life Are Ensured. Comes With A .