Problem: excessive hum from speaker.
Solution :
Often caused by faulty capacitors not smoothing the rectified ac properly however in this amps case it was something else as well. In this amp a number of op amps that are used for the effects send and return loop are powered by a 30v supply. It’s worth checking this as in ones case it had significant ripple caused by a number of minor components. Unusual because the current draw from the op amps would be minimal.
Tag: Hi Gain 50
Hiwatt hi gain 50 combo
Well made PCB amps with high quality components and Lead dress.
Watch out for the hidden mains fuse holder on the back. Its functiona is combined with voltage selector so if you put it in incorrectly then there could be trouble as you could be accidentally configuring the amp for say 110v and applying 240v.
