14-05-2020, 03:55 PM
Mike Watterson Wrote:The 6BW6 (noval) is similar to an Octal 6V6, but obviously not the same valve. The B7G 6AQ5 = EL90 was maybe more popular in USA radios and used in some early 1960s smaller German sets. I'm not sure if the 6AQ5 and 6BW6 are exactly the same valve in a different package.
I made an amplifier some years ago using a pair of 6AQ5's. It works well (dunno if Andy would think it sounds 'nice'). But they do run stinking hot. The chassis runs in open air...
I don't think the 6AQ5 is a 6BW6 in a B7G bottle - the 6BW6 that I have nearly fills the B9A diameter so wouldn't fit in B7G.
And although I have 6V6's, they are blackened on the inside. I have never opened one - but doubt that the guts are small enough to fit in a B9A-sized jar. (Well, the 6V6 was first, in the days when B9A and B7G weren't even thought of, so why would they not take advantage of the nice big Octal glass?)
Although they all have just about identical characteristics, I reckon there are 3 different electrode geometries.
