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Musician questions

Former Community Member
Former Community Member

Hi there, 2 questions using my Seaward Apollo 500:

1- my radio connection between guitar and amplifier has a separate PSU, so is class 3? Should I simply PAT this as class 2?

2- my bass combo amp is a pretty new Ashdown Studio 15 which does not have any class marking (apart from RoHS CE) so has to be class 1? But this device fails earth continuity and I don't believe it is manufactured to earth the exposed metal parts. Can I ignore this test? If so, for what reason?

Thank you.

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    Class D I would expect to relate to the design of the amplifier circuit - it's one of the more efficient designs that most manufacturers use these days - as you say nothing to do with the equipment inspection and test.

    ‘Test 102’? - No idea……..perhaps that's a reference to a pre-programmed test on their equipment.

    If you have continuity at a suitably low resistance value to the exposed conductive parts (especially the big metal panel on the back) you should be OK - and an appliance tester doing a class I test should pass it.  The panel may well be lacquered though or otherwise treated that makes getting a good connection between the earth probe of the tester and the actual metal tricky sometimes - which will give you a fail.

    We should really all drop the ‘PAT’ term, as the ‘P’ isn't really applicable any more, but the full alternative of ISITEE likely won't catch on very fast either!

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  • 0

    Class D I would expect to relate to the design of the amplifier circuit - it's one of the more efficient designs that most manufacturers use these days - as you say nothing to do with the equipment inspection and test.

    ‘Test 102’? - No idea……..perhaps that's a reference to a pre-programmed test on their equipment.

    If you have continuity at a suitably low resistance value to the exposed conductive parts (especially the big metal panel on the back) you should be OK - and an appliance tester doing a class I test should pass it.  The panel may well be lacquered though or otherwise treated that makes getting a good connection between the earth probe of the tester and the actual metal tricky sometimes - which will give you a fail.

    We should really all drop the ‘PAT’ term, as the ‘P’ isn't really applicable any more, but the full alternative of ISITEE likely won't catch on very fast either!

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