The main difference between the 5881 and 6L6 vacuum tubes is the power output and rating. The 5881 tubes are rated for 23 watts maximum, while most 6L6 variations can handle 25. Then there is the 6L6GC, which is rated for 30 watts and is the more popular model in this family of tubes.

Most tube amplifiers use 5881 tubes as they are reliable, durable, and can easily tolerate high voltage. 5881 has a warm tone and excellent bite. Sovtek 5881 offers a round warm tone that adds sweetness to any guitar. This tube is made per demanding military standards and can tolerate higher voltage than any other 6L6.

6L6 and 5881 tubes are types of beam tetrode tubes used commonly in guitar amplifiers. They are known for their large plate voltages and substantial power handling. With a beam tetrode design, both types of tubes feature focused electron streams, which lend to increased power efficiency.

The 6L6 vacuum tube was first released by RCA in 1936. Nearly 80 years later it remains the most used power output tube. It dominates the electric guitar tube amp world. The 6L6 tube equivalent part numbers 5881 and 7581A vacuum tubes are acceptable substitutes in some amplifiers. Matched pairs, quads, and octets are available...More Details

2009年4月11日 · The plate voltages of the power tubes in the two amps is 420vdc and 436vdc, respectively, when properly biased with a Variac-set 120vac input. Will that cook modern 5881s? Or are these tubes basically the same thing and the change isn't worth the bother?

2014年9月9日 · The tube amplifier replaces a solid-state amplifier which was driven by a tube preamplifier. For the tube amplifier circuit I used a cutoff pentode (6SJ7 or 6SD7) driving a beam power pentode (6L6 or 5881) in a single-ended circuit (class-A operation). The amplifier schematic is very similar to the one I used for my very first tube amplifier ...

5881 is a beam power pentode with a maximum plate dissipation of 23W in the classical short bulb. It is very similar to the 6L6 sound but with less power. It can be used in any 6L6 amplifier.

The popular TAD 5881WXT is a very dependable 6L6GC type tube with a more modern and aggressive character. It has slightly less power than a 6L6GC but has a special bite in the upper mid range, which allows your sound to cut through on stage.

the 5881 is the electrical equivalent to types 6l6 and 6l6g except that THE PLATE AND SCREEN DISSIPATION RATINGS HAVE BEEN INCREASED APPROXI— MATELY 20 PERCENT.

6L6GB / 5881 - 25W version. Can only be used on amps that call for 5881; KT66 - A 30W variation of 6L6, requires higher heater current; You can use 6L6GC where any of the other tubes are used, so if you aren't sure, go with 6L6GC types and you will be fine.