by mesherm » Thu Sep 05, 2013 8:53 pm
I have used 7F7s and 7N7s in a few amps but I modified the center connector on the loctal sockets so it was easier to remove and replace the tubes. It was actually easier to pull them then 6SL7s in some Chinese ceramic 8 pin octal sockets I've used.
Mike's N-1 Rule: When looking for N number of components to finish a job, you have a 95% chance of only finding N-1 of them.