Class D in 1966

[PRR]

Class D in 1966. A filler article by Don Lancaster.

 

[Michael Bean]

I think something went wrong while scanning the pages, the first three are unreadable, very light/no contrast.

Mike

 

[jean-paul]

Next you wil tell us that they also existed with tubes 🙂

 

[steveu]

I think something went wrong while scanning the pages, the first three are unreadable, very light/no contrast.

Mike

Yes, but a quick run through Irfanview makes it readable. I won't bother trying to improve it.

 

[simon7000]

I had no problem reading the original post of the article.

 

[jjasniew]

Thanks for the clarified version!

 

[jjasniew]

I always liked Don Lancaster's articles. I was 9 when that came out; I'm sure I wouldnt have understood a word of it. Pulse width modulators, filters with relative cut-off frequencies, AC current flow in motors restricted due to inductance - I just would have thought; "Don Lancaster is cool".

 

[bucks bunny]

Next you wil tell us that they also existed with tubes 🙂

Yessir, there has been some class-d prototype with tubes at that time I found years ago on the internet. Sadly I lost the link.

 

[Kay Pirinha]

Interesting. It's a pity that he didn't state anything on the PWM, the real core of a class D amp.

Best regards!

 

[Michael Bean]

Yes, but a quick run through Irfanview makes it readable. I won't bother trying to improve it.

Much better, thanks!

Mike