Old double insulated receiver

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Old 12-13-16, 12:22 PM
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Old double insulated receiver

I am looking at a receiver/amplifier that was manufactured in the mid 1970s. It has a very solid all metal case. It is powered by a mains lead that has only two conductors, active and neutral. It does not have any Class II notation or symbol anywhere on the case. I am wondering whether the mid 70s might have been a time when double insulated appliances were manufactured prior to Class II standards and notation requirements.
The appliance in question is an Aiwa AX-7500.
 
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Old 12-13-16, 03:17 PM
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Note: Poster is located in the UK. Voltages are different.
 
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Old 12-13-16, 06:55 PM
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Welcome to the forums.

That is a solid state unit powered directly from a multiple primary power transformer.
That transformer is what isolates the chassis from mains voltage.

Tubed equipment was completely different.
 
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