Hi

I have a loud buzzing noise from my amp (Boss Katana Mini), noticeable when the

gain is turned up or brown/crunch enabled- the buzz is too loud to use the amp on that setting.

I did some detective work: the buzz is there with a cable but no guitar connected.

I tried in another room then outside in the garden on an extension lead : still buzzing.

When I connect the end of the lead (the end not in the amp) to the copper pipe on the central heating, the buzz vanishes.

So looks like the buzz its likely to be down to the lead.

Make is 'Tourtech' (3M long, 1/4" TS Male both ends) , given as a freebie when I bought the guitar.. so might be at the budget end of things.

I have one other lead : same problem, but also looks like a budget lead, no quality lead to swap in to test.

Am I right in thinking the cable is likely the source of the problem?

If yes , is there anything I should look for in a new cable (shielding?braiding? - are they the same thing? "low noise"?).

Thanks in advance.

Mike