ไม่น่าใช่นะครับ เพราะถ้าใช้วิธีนี้ 6J5 จะไม่เข้าพวก
6J4 single triode - 1 heater, 1 cathode, 1 plate, 1 grid total 4 -> ok
6J5 signle triode - 1 heater, 1 cathode, 1 plate, 1 grid total 4 -> 
6J6 dual triode common cathode - 1 heater, 1 cathode, 2 plates, 2 grids total 6 -> ok
หรืออย่าง 6J7 pentode - 1 heater, 1 cathode, 1 plate, 1 screen grid, 1 suppersor grid, 1 control grid total 6 ->
K.LN krub , ผมได้ข้อมูลจาก WEB , copy ไว้ จำ WEB ไม่ได้ ลองอ่านดู krub.
1. What do the numbers and letters in a tube's name mean?
There are several different tube numbering systems that you may see on tubes, which generally are a result of where they were built. Most commonly the numbers contain digits only (e.g. 5751), or are some combination of numbers and letters (12AX7, ECC83, CV4004). These different numbering systems may be from the American or British military, or from American or European industrial or consumer use, and then of course there are many strange exceptions. But to use the notation commonly seen in the United States, here is the meaning of "12AX7":
12 - the filament voltage
AX - an arbitrary model number
7 - the number of internal elements, including the filament
To make things more complicated, many tubes have letters after the name, such as 6L6WGB, 6L6GC. Sometimes these letters mean functionally nothing (design revisions) and sometimes they refer to different voltage capabilities of a given type.
The bottom line for buying tubes for your amp: we list types together that will work in your amp without problems. There are many different tube substitution possibilities for those wishing to push the limits in the quest for unique performance, but our site is straightforward for those who just want to re-tube their amp without any extra concerns.
