quickie review

dgb · 5105

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Offline Paul Joppa

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Reply #1 on: April 05, 2011, 06:10:58 AM
Love it! I especially like this comment on the circuit "...if you want a simpler way to amplify audio, you

Paul Joppa


Offline Natural Sound

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Reply #2 on: April 05, 2011, 06:56:00 AM
From the article;
"The circuit design is single-ended, meaning it amplifies the entire signal with a single semiconductor device"

Is a vacuum tube considered a "semiconductor"?



Offline Wanderer

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Reply #3 on: April 05, 2011, 08:53:30 AM
Is a vacuum tube considered a "semiconductor"?

My betters are certainly free to correct me but a "vacuum tube" a thermionic device meaning it needs heat to free electrons for conduction in a vacuum (or inert gas).

In semiconductor devices conduction happens in a solid (non-gaseous) state.   

So by the definitions I know a tube is not a semiconductior. 

Kevin R-M


Offline Paul Joppa

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Reply #4 on: April 05, 2011, 09:56:52 AM
Clearly the author does not differentiate between "active device" and "semiconductor," having almost never heard of any other kind. To be fair, many consider the actual working of an oxide cathode to be a semiconductor. (Does not apply to tungsten filaments though.)

Paul Joppa


Offline badman

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Reply #5 on: April 06, 2011, 06:42:57 AM
Quickie indeed- no comments on sound!



Offline Doc B.

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Reply #6 on: April 06, 2011, 06:55:46 AM

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.


Offline Wanderer

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Reply #7 on: April 06, 2011, 09:59:59 AM
I found the test results particularly interesting, particularly the FLAT frequency responce.

Would love to see what adding a PJCCS does to the gain and distortion specs.   

Kevin R-M


Offline badman

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Reply #8 on: April 06, 2011, 12:22:05 PM
Ah, cool, it read like the article was over after the first page  hahaha

Impressive FR and S/N indeed.