"N_Cook" wrote in message
...
spamtrap1888 wrote in message
...
On Jun 18, 8:03 am, "N_Cook" wrote:
Hearing it again I would say its more open looped amp motorboating. Cant
analyse for frequency etc until tomorrow. Needless to say have not been
able
to induce any noise like this.

Further info from the owner
" It's whenever there isn't a signal that the buzz persists. I first
noticed
it when i stopped playing in the middle if a song and i heard this
murmur"

140K MP3 , 5 second file, is (theoretically ) now on/off this host
sitehttp://www.diverse.4mg.com/ampbuzz.htm

(minimal htm page to get round "forbidden" remote linking stuff )

Your search - buzz site:www.diverse.4mg.com/amp - did not match any
documents.

+++++

unfortunately owner's choice of file name, i convert spaces to undescore,
I
should have changed it to _.
There is a space between buzz and amp in the file name

I don't know how fidele this recording is, phone - email - MP3
player -DSO
but I make that a principal repeat of 103 Hz and next most observable
repeat
of 475 Hz.
So is it mains initiated ?
103100 , I will assume that is twice mains frequency as principal
component




By ear, I make that 100Hz and 500Hz.

But my ears are a bit old.



Gareth.