The 6L6 is the designation for a range of power amp tubes. There have been many designations on the 6L6 with some companies putting different letters after 6L6, for example 6L6GC to designate a variation or updated version. The 5881 is also a close variation on this tube, but please check manufacturer guidelines.
6L6 Power Amp Tubes
JJ Electronic 6L6GC JJ Tube
£32.00 - £119.00
Sovtek Sovtek 6L6WXT Tube
£32.00 - £59.00
Tung Sol Tung Sol 6l6G Tube
£52.00 - £99.00
Electro Harmonix Electro Harmonix 6L6 Tube
£32.00 - £58.00
Sovtek Sovtek 5881 / 6L6WGC Tube
£29.00 - £59.00