Tube Amp Doctor 6L6WGC-STR Black Plate (Matched Pair) Exact replica of 1960s GE 6L6GC. Sold in matched pairs. Gold-plated screen grid wire for long life and high output. Excellent break-up distortion characteristics for "Tweed" or "Blackface" style amps Compact, but sturdy glass envelope for use in amps were clearance is an issue. Incredible vintage tone. Sounds like no other 6L6GC on the market today.