I'm currently building a lunchbox amp around a pair of 6BM8s -- push pull output and phase inverter in two bottles ...
Near as I can determine, the 6BM8 is pretty much a 5751 triode and an EL82 in a single envelope. Thinking ahead to my next project, I've been thinking about the 6BM8 for reverb drive (pentode) and recovery. I know EL84s have been used to drive the reverb transformer, but are a bit like driving thumbtacks with a sledge hammer. The power pentode side of the 6BM8 might be a bit less overkill. More importantly, it would allow me to implement a decent reverb with just one bottle. (Have used 12DW7s with the 12AU7 section as driver, and it worked okay, but not the kind of reverb I want if I'm going to bother doing it with tubes and springs.
On a different, but related topic, I've done a few builds using Merlin's bootstrapped cathodyne phase inverter, with pleasing results (that's what I'm using in my lunchbox amp). I'm wondering how it would work to use a 8BM8, with the power pentode implementing the phase splitter proper, with the triode driving it?
Both seem like scenarios where there might actually be a valid reason for doing it, rather than 'what if I try THIS goofy $h1t'
Originally Posted by ThermionicScott
Doesn't Victoria use a 6BM8 in one of their Gibson-derived amps? I dunno much about it, but I thought I'd throw that out there...