RCA 6L6GC – Black Plate Power Tube

The RCA 6L6GC is the gold standard of American-made power tubes—and one of the most legendary 6L6s ever produced. With its rugged build, rich harmonic content, and unmistakable warmth, this tube is a favorite among guitarists, hi-fi enthusiasts, and tube amp techs alike.

RCA's black plate 6L6GCs deliver powerful low end, creamy mids, and sweet, glassy highs—making them a go-to for everything from clean Fender tones to smooth overdrive. Whether you're restoring a vintage Twin Reverb or upgrading your modern amp, this tube brings the mojo.

Features:

• Made in the USA – Vintage RCA quality

• Black plate construction for rich tone and durability

• Rated for 30W plate dissipation (true 6L6GC spec)

• Ideal for guitar amps, hi-fi gear, and vintage restorations

• Tested for transconductance, shorts, noise, and emissions

Tone Profile:
Bold. Smooth. Musical. RCA 6L6GCs are known for their sweet compression, detailed mids, and powerful presence—especially when pushed.

These tubes are getting harder to find in great shape. Grab one while you can and bring real vintage tone back to your amp.

Close Matched Sets of Two Available. We are woking on offering sets of 4. Reach out if you would like a set of 4 before buying!

At Fuzz Audio:

·      All tubes are tested on a calibrated Hickok 539b & Western Electric KS-16650-L1 Tube Testers.

·      30 Day Money Back Guarantee

·       All power and preamp are tubes tested for Mutual Conductance (Gm)

·      Do not buy power or  preamp tubes that have been tested solely on an emissions tester or “tube checker”- this is an inadequate test.