Came across this little Hitachi Amp and tuner the other day. It's tiny 9" wide and 7 deep. That's a used pencil on top.
The big surprise was the inside, a big ass toroidal transformer and good size heat sinks. It uses some kind of power packs for the amps. Overall very well made. The case is steel but the face plates and back panels are plastic. The tuner assembly has aux phono and tape inputs. Judging by the LED power meters, it's from the late 70's or very early 80's
The DC offset on one channel is way high, 120mv or so. I tore it down to see if there were any adjustment trimmers but couldn't find any. I also don't see a protection relay.
Does anyone have any suggestions on how to get the offset in line?
- Pete
The big surprise was the inside, a big ass toroidal transformer and good size heat sinks. It uses some kind of power packs for the amps. Overall very well made. The case is steel but the face plates and back panels are plastic. The tuner assembly has aux phono and tape inputs. Judging by the LED power meters, it's from the late 70's or very early 80's
The DC offset on one channel is way high, 120mv or so. I tore it down to see if there were any adjustment trimmers but couldn't find any. I also don't see a protection relay.
Does anyone have any suggestions on how to get the offset in line?
- Pete