10-24-2010, 04:17 PM
The FM1000 seems to have no direct replacement, but is a heptode, much like the later 6BE6.
http://www.philcorepairbench.com/tube/fm1000.htm
I don't have one, but they shouldn't be too hard to come by.
http://www.philcorepairbench.com/tube/fm1000.htm
I don't have one, but they shouldn't be too hard to come by.