NP's first Single-Ended Class A amplifier using BjT's biased by a CCS

[tiefbassuebertr]

about
http://www.passlabs.com/pdfs/articles/seclassa.pdf
I read follow:
In 1977 I designed and published in Audio Magazine a single-ended
Class A amplifier using bipolar followers biased by a constant current
source. A considerable number of amateurs have built the device, rated
at 20 watts output, and many have commented on its unique sonic
signature. It is one of the very few examples of a solid state single-
ended output stage available.

Which audio magazine? Are this paper online?
Who knows the URL?

 

[Peter M.]

Is it this one?

http://www.passdiy.com/pdf/classa_amp.pdf

 

[tiefbassuebertr]

Is it this one?
http://www.passdiy.com/pdf/classa_amp.pdf

I think, yes - thank you very much. Because there isn't a exact name by this amp project like "ZEN" or "Death of ZEN" it is hard to find - if at all, only by chance.
Construct A Class-A Amplifier

Who knows the title of the audio magazine at those days ?? Was it the MJ magazine mentioned about
http://www.diyaudio.com/forums/soli...sen-jikken-yearly-index-1924-2009-wanted.html

 

[CanAm Man]

Peter M. Re: Note to myself: Never again use fingers to check if there still is voltage left in a capacitor...

I discovered a while back it's always better to use a FRIEND'S FINGERS to check if there still is voltage left in a capacitor....... or a friend's cat.....

😀

 

[Melon Head]

Whatever you do, don't use your tongue

 

[Peter M.]

I think, yes - thank you very much. Because there isn't a exact name by this amp project like "ZEN" or "Death of ZEN" it is hard to find - if at all, only by chance.
Construct A Class-A Amplifier

Who knows the title of the audio magazine at those days ?? Was it the MJ magazine mentioned about
http://www.diyaudio.com/forums/soli...sen-jikken-yearly-index-1924-2009-wanted.html

You`re welcome 🙂

 

[Peter M.]

Peter M. Re: Note to myself: Never again use fingers to check if there still is voltage left in a capacitor...

I discovered a while back it's always better to use a FRIEND'S FINGERS to check if there still is voltage left in a capacitor....... or a friend's cat.....

😀

Haha, I`ll try that next time 😀

 

[Peter M.]

Whatever you do, don't use your tongue

I`ll try to remember that 😀

 

[CanAm Man]

Remember, though, if you elect to use your friend's cat, this might only work for nine times--before you need to find another cat.

It's all a function of joules, ergs, and skin resistance.....😱

 

[Nelson Pass]

That article appeared in Audio Magazine in 1977, as I
recall. It is listed in the article downloads as Pass Labs
as the A20

😎

 

[gaetan8888]

Hello

The only NP article in Audio Magazine in 1977 that I found on the Pass Lab site are this one:

http://www.passdiy.com/pdf/classa_amp.pdf

Bye

Gaetan

 

[d to the g]

Only 20 watts and they need an I beam crane to lift it?

 

[kevinh]

I have been thinking of something like this using JFets and the SemiSouth Power Fets.

Back to the future. 😉

 

[eyoung]

Did I hear BA1-J???

el

 

[tiefbassuebertr]

That article appeared in Audio Magazine in 1977, as I
recall. It is listed in the article downloads as Pass Labs
as the A20

😎

Thank you very much for the cover pic. An other magazine than that one about
Audio Magazine Equipment Reviews Part 1

 

[vizion]

i miss the old audio and video mags of yesteryear. Where have thee gone ? Oh right, they're probably available now for a li'l iPad. But it's still different when you hold up these magazines up close. A real pleasure to read.