5881 vs kt66. Putting it into lay person’s language, think of the 5881 valve as a 23-watt tube. Need help? There is no difference between the 6L6WGB or the 5881, they are the same tube. It also has the same maximum allowed plate voltage. BEAM PENTODE UN' POTENTIAL CATHODE HEATER VOLTS 900 MA. This article is designed to show you the differences. It is diaphragm controlled, supplied with an in-line mesh Y-strainer, and 1/2" NPT inlet and outlet. The Honeywell Home 5800 Series is the most flexible, convenient and cost effective wireless security in the industry, with over 100 million devices installed troublefree. The 6L6 tube equivalent part numbers 5881 and 7581A vacuum tubes are acceptable substitutes in some amplifiers. 5881 vs 6L6 can be a tough choice when you don't know much about the tubes. . gzosx gnfwt kjs werpfnv dklv trylmp fgmdggj ubyncr gvsnwqh hzxm