Some vacuum tubes have two model numbers stamped on them. For example, I have a 6LF6/6LX6 tube and I also have a 6LF6/6MH6 tube. I also have 6LF6 tubes and 6LX6 tubes with only one of the model numbers on them. Looking at the datasheets, the 6LX6 is the same as the 6LF6, but the max plate power is only 30W on the 6LX6 versus 40W on the 6LF6. Meanwhile, the 6MH6 has the same specs as the 6LF6 except for the 6MH6 having a 38.5W max plate power and a whopping 500mA max DC cathode current (the 6LF6 has only a max of 400mA csthode current).
If a tube has two model numbers on it, is the specs the maximum of both tube models or the minimum? For example, does a “6LF6/6MH6” stamped tube have a max plate power of 40W and a max cathode current of 500mA, or is it 38.5W and 400mA? My guess is it is the max because the tube has the heat dissipation fins that a tube stamped woth only 6LX6 does not have.
11-30-2021, 08:19 PM
Threaded Mode