Digital Amps vs Solid State Amps

Not exactly. FM was proposed first by Edwin Howard Armstrong in 1935 paper: "A Method of Reducing Disturbances in Radio Signaling by a System of Frequency Modulation"

Class D amplifier was proposed first by P.J Baxandal in 1959.

First commercial class D amplifier was designed by Gordon Edge and manufactured by Clive Sinclair in 1964 under name X-10.

www.nvg.ntnu.no/sinclair/audio/gallery/x-10_boxed.jpg
www.nvg.ntnu.no/sinclair/audio/gallery/x-10_ad.jpg

It was Hi-Fi amp - it says so on the box (LOL)

"It was Hi-Fi amp - it says so on the box (LOL)"

Yep, and instructions enclosed as well.

from SOUND & VISION, issue January 2008
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"50 Greatest A/V Innovations: The most revolutionary products & technologies of the past 50 years"

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"Digital Amplifiers:

Going back to the Infinity SWAMP 1 of the mid-1970s, digital amps have had a checkered history, but they seem finally to have turned the corner in terms of reliability and performance. Highly efficient and cool-running, they promise to play a bigger role in the future."
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SWAMP was this Infinity amplifier developed by John Ulrick and shown at CES 1974....

Is that the same Sinclair who was involved in early computers?
'X-10'.....Hmmmm wasn't that revived by BSR with the home remote thing?
Was Sinclair involved with that TOO?

Magfan - I remember in late 70's Timex/Sinclair computer with BASIC interpreter and keypad with direct commands. Whole thing was running on Z80 Zilog processor. It had 1kB of RAM but you could extend it with external plug in module. I played fascinating game of table tennis on that thing for many hours.

I'm thinkin' thats the one. My friend built one from a kit.
It was really small......certainly smaller than cigar box size.

The same guy later helped CLOSE Zilog up in Idaho after working there for over a decade. They closed maybe 4 or 5 years ago, tops.
I've worked in semiconductor processing as far back as when Western Digital made its own silicon. The first 'floppy' I ever saw was dinner plate size....8"