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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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    RichMcGill: 
     

    The first reply said that the combo is class D with a switchmode supply

     

    Am I right in thinking that class D with a switchmode supply has no impact on PAT?

     

     

    The ‘Class D’ in the context of an amplifier, is related to the way that the main output devices are configured. This is an electronics term and has nothing to do with Class I or Class II etc with respect to the earthing regime. For the purposes of our discussion on this forum, its a red herring.

    edit: the poster above posted while I was typing my response.

    I suspect that “test 102” refers to one of the standard tests on something like a SEWARD PAT tester.  We have a SEAWARD HAL which is basically a bench mounted PAT machine which is intended for doing end-of-line production tests. It has a series of pre-defined test sequences & associated pass/fail levels. I suspect that the OEM has simply quoted the standard test number that he uses for that product.

     

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  • 0

    RichMcGill: 
     

    The first reply said that the combo is class D with a switchmode supply

     

    Am I right in thinking that class D with a switchmode supply has no impact on PAT?

     

     

    The ‘Class D’ in the context of an amplifier, is related to the way that the main output devices are configured. This is an electronics term and has nothing to do with Class I or Class II etc with respect to the earthing regime. For the purposes of our discussion on this forum, its a red herring.

    edit: the poster above posted while I was typing my response.

    I suspect that “test 102” refers to one of the standard tests on something like a SEWARD PAT tester.  We have a SEAWARD HAL which is basically a bench mounted PAT machine which is intended for doing end-of-line production tests. It has a series of pre-defined test sequences & associated pass/fail levels. I suspect that the OEM has simply quoted the standard test number that he uses for that product.

     

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