Thanks for getting back to me.
The reverb works from switch-on, and then at some point when I'm concentrating on playing, it simply drops way down in volume and stays like that for an unpredictable period of time. There's no crackling or popping sounds like you might get from a loose connection.
I'm wondering if its heat-related as next time I use the amp the reverb initially works?
I'd certainly like to get the $100 amp upgrade. Do you use a particular shipping service? What would the typical cost be to send an amp chassis back to you? It would also be very useful to get an idea of turn-around time as I'm currently using the amp most days (despite lack of reverb) so I'd have to sort out an alternative while my amp is being fixed.
As I explained in earlier emails, I could not find a serial number anywhere on the outside of the amp. Maybe if I take the chassis out I'll finally see one.
I tried to restate the problem - no complete failure, just intermittent lack of reverb.
Aside from the shipping cost, I noted that I'd have to buy a backup amp to use while the Superfly was away. It seems a reasonable question to ask how long that would be.
...and I still couldn't find a serial number anywhere.
At least this time I got a quick response - see part 10.