tlbs wrote in message
ups.com...

N Cook wrote:
The term escapes me for when say negative going audio output is absent
and
only positive going is present, or vice versa. ?


If the audio voltage is "low level" -- under 1 volt peak, and the
amplifier output is a push-pull type especially class B, then it is
probably crossover distortion.

If the audio voltage you see is well over 1 volt peak (with no negative
voltage swing), then what the other guys above said is correct, but
there is no standard term for that kind of distortion I can think of
other than "rectification".


I'll call it complementary output failure half-wave distortion,
but as its a specific and recognisable sort of distortion that it had a
specific name.
Just writing up a Laney R4 repair brief.

I've asked this one before but is anyone aware of a collection of audio file
snippets with simulated or actual named distortions to point non-technical
owners of equipment to to help diagnosis of intermittant faults.