If using a 6V6 tube, you can get by with a 0-50 ma. This circuit also works well with the 6V6 tubes, although output will be less. I used the 6L6G because they are big and look great. In America, this tube is known as the 6BQ5, and was. The EL84 can be brighter than the E元4 and generally has a bit less low-end.
It breaks up faster than the E元4, 6L6, and 6V6, and has the least amount of headroom of the four. Part Numbers.The EL84 tube has a snarly sound (bright with midrange punch), and is usually found in smaller wattage amplifiers. Matched versions of this tube use Apex Matching. Mica spacers with metal springs eliminate tube rattle and microphonics. Modeled after the vintage RCA 6L6GC "blackplate". Excellent tone and performance compared to most other 6L6 or KT66 types. On the 7591 the cathode, grid 1 and 3, are on different pins than the other three tubes. The only difference in the tubes seems to be a grid 3 in the el34 at pin 1. I notice that three of the tubes I mention (el34/6v6/6l6) have their plates, cathodes, filaments ,grid 1 and grid 2, at the same pins. Three channels of road- tested sound work for any playing style-crisp cleans, raw crunch or searing leads, while newly added independent dual-concentric. With its smaller size and portability, the EVH® 5150III® 50W 6L6 Head is the perfect amp for players who want arena volume and performance in a more compact package. ANOS Genelex/GEC KT66 $199.95 ANOS Genelex GEC KT66 originals, not the reissue. intended for radio transmitters, some of which are usable beyond 500 MHz.Vacuum Tubes for Guitar & Hifi Amps | Doug's Tubes 6L6 / 5881 / KT66 6L6's are beam power tetrodes that can be characterized as having a bold, bigger rounder sound - with crystal highs, warm mids, and bass controlled lows.
The 807 was the beginning of a series of beam tubes. The 6V6, 25L6, and others were immediate developments, which gave lower power for small. The 6L6 gave birth to a vast array of beam tubes (Figure 6).