I own a Pitbull One-Hundred model G-100-S serial H920042, which as far as I understood is the predecessor of the Ultra Lead.
Unfortunately, the amp has had some issues including periodic drops in volume and now, after a long period of not using it, no volume at all anymore. The fuses do not seem blown and all tubes are lighting up.
I’d like to take it to a local technician here (Europe) to get it repaired. Are there schematics available for this amp please?
Hi Teebeegee and welcome!
What country are you in?
Thanks, Dan! I’m located in Belgium.
Hi,
We don’t know anyone in Belgium but we do have a location in Germany we work with.
If you want to go to a local place that should be fine for a repair and a service. You can read about the next steps for that here below. We just as they are a reputable place, we’ll work with them to support the service. We find techs don’t usually need schematic information, for a general service. Can I get my Fryette product repaired at a local repair shop?
If you want to ship to Germany we can point you in that direction too. Up to you.
Good news! I decided to do a final check and clean all cable inputs - including the serial FX loop - with contact spray and tadaaa, she growls again! Should’ve probably realized sooner that it could’ve been something simple like that after such a long period without use but I’m happy the beast has awakened once more 
Great news!
I’ll close the post now.