metal shield

[Matt_H]

It was probably a regulatory/FCC requirement. Some machines did ship without the top shield. I wonder if its inclusion was related to the regulatory environment of the country where the machine was to be sold.

As an anecdote, I have a few US 1200s and a US 500 and they all have the top shields. My UK 600 came without a shield.

[Matt_H]

But am I wrong, the A1000, A2000, A3000, etc don't have such shields...

I can't explain the A1000, but the other big box machines' metal cases may have served the same function as the RF shield in the smaller Amigas.

[Matt_H]

Maybe not very relevant, but A1000 is of plastic case construction (remember team member autographs underside of top cover?), it does have RF shielding.

But wasn't the A1000 the only plastic Amiga to ship without metal RF shielding? What RF sheilding are you referring to on the A1000?

I wonder if the regulation was introduced post-1985...?