Hiwatt Hi Gain 50

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 … Read more

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.

Hiwatt DR112 Fault

This Hiwatt PA is quite original. Transformers, knobs, Capacitors were all as new with date codes and appropriate levels of corrostion from the early 70s. There is evidence of some earlier repairs e.g. the rectifying diodes are not very straight and some resistors have clearly been replaced at some point.  If you have never seen … Read more

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