Exchanged it at Richer Sounds , problem gone! Thanks to one and all
(well not quite all).

FWIW new clips at URL below.

Lordy
http://lordy.org.uk/noise.html

On Wed, 30 Aug 2006 03:27:22 GMT, lordy wrote:


Exchanged it at Richer Sounds , problem gone! Thanks to one and all
(well not quite all).

FWIW new clips at URL below.

Lordy
http://lordy.org.uk/noise.html

That all looks pretty good. If you have suitable software, though it
would still be a good idea to get rid of everything below 20Hz - there
really is some speaker-flapping stuff going on there. Audacity is
freeware that will take care of it if you have nothing else.

(Incidentally I just had a proper listen to the original files, and
everyone was dead right - the hum didn't start 'til you hit the
groove. Still no idea how that could be, apart from it actually being
recorded on the disc which seems very unlikely)

d

--
Pearce Consulting
http://www.pearce.uk.com

On Wed, 30 Aug 2006 07:32:30 GMT, (Don Pearce)
wrote:

(Incidentally I just had a proper listen to the original files, and
everyone was dead right - the hum didn't start 'til you hit the
groove. Still no idea how that could be, apart from it actually being
recorded on the disc which seems very unlikely)

Sorry to reply to my own post, but I have just thought how it could
be. The source of the hum was actually a transverse mechanical
vibration of the platter. While the stylus was skating about on the
flat part of the record it could not be transmitted into the needle -
the vinyl just slid around under the stylus. As soon as it was in the
groove, though, the stylus was grabbed, and any mechanical movement
was sent straight into the it.

Anyway - that's my theory. Anybody got a better one?

d

--
Pearce Consulting
http://www.pearce.uk.com

"Don Pearce"


Sorry to reply to my own post, but I have just thought how it could
be. The source of the hum was actually a transverse mechanical
vibration of the platter. While the stylus was skating about on the
flat part of the record it could not be transmitted into the needle -
the vinyl just slid around under the stylus. As soon as it was in the
groove, though, the stylus was grabbed, and any mechanical movement
was sent straight into the it.

Anyway - that's my theory. Anybody got a better one?



** Seen the exact, same phenomenon many times.

Vinyl recordings do all seem to have grooves for a reason.





........ Phil

"Don Pearce" wrote in message
...
On Wed, 30 Aug 2006 07:32:30 GMT, (Don Pearce)
wrote:

(Incidentally I just had a proper listen to the original files, and
everyone was dead right - the hum didn't start 'til you hit the
groove. Still no idea how that could be, apart from it actually being
recorded on the disc which seems very unlikely)

Sorry to reply to my own post, but I have just thought how it could
be. The source of the hum was actually a transverse mechanical
vibration of the platter. While the stylus was skating about on the
flat part of the record it could not be transmitted into the needle -
the vinyl just slid around under the stylus. As soon as it was in the
groove, though, the stylus was grabbed, and any mechanical movement
was sent straight into the it.

Anyway - that's my theory. Anybody got a better one?



Forget all the theories Don, it was a short either in the cart or the
wiring. No amount of 'waveform analysis' was going to beat a bit of tapping
about with a fingertip here....

On Wed, 30 Aug 2006 11:30:34 +0100, "Keith G"
wrote:


Forget all the theories Don, it was a short either in the cart or the
wiring. No amount of 'waveform analysis' was going to beat a bit of tapping
about with a fingertip here....


Whatever it was , it wasn't a short in anything - totally wrong set of
symptoms.

d

--
Pearce Consulting
http://www.pearce.uk.com

Don Pearce wrote:
On Wed, 30 Aug 2006 11:30:34 +0100, "Keith G"
wrote:


Forget all the theories Don, it was a short either in the cart or the
wiring. No amount of 'waveform analysis' was going to beat a bit of tapping
about with a fingertip here....



Whatever it was , it wasn't a short in anything - totally wrong set of
symptoms.

d


Well, given that it was only there when the stylus was in the groove,
and it got better with a new example, I would guess it was the noisy
motor that was suggested before in the links.

--
Nick

"Don Pearce" wrote in message
...
On Wed, 30 Aug 2006 11:30:34 +0100, "Keith G"
wrote:


Forget all the theories Don, it was a short either in the cart or the
wiring. No amount of 'waveform analysis' was going to beat a bit of
tapping
about with a fingertip here....


Whatever it was , it wasn't a short in anything - totally wrong set of
symptoms.



I disagree, the hum started when there was lateral force on the stylus -
suggesting an internal problem stemming from cantilever movement. If not a
'dead short' then summat near enough to induce hum.

Anyway, whatever - *my* suggestion to replace (or refit) the cart appears to
have been the fix he needed....

On Wed, 30 Aug 2006 12:21:01 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
...
On Wed, 30 Aug 2006 11:30:34 +0100, "Keith G"
wrote:


Forget all the theories Don, it was a short either in the cart or the
wiring. No amount of 'waveform analysis' was going to beat a bit of
tapping
about with a fingertip here....


Whatever it was , it wasn't a short in anything - totally wrong set of
symptoms.



I disagree, the hum started when there was lateral force on the stylus -
suggesting an internal problem stemming from cantilever movement. If not a
'dead short' then summat near enough to induce hum.

No - that would have resulted in a very different sort of buzz - you
would have heard the rapid connection and disconnection noises, and
they would have modulated the sound. None of that was happening. And
shorts don't induce hum - they make the signal stop.

Anyway, whatever - *my* suggestion to replace (or refit) the cart appears to
have been the fix he needed....


Err.... he got the whole thing replaced by Richer. (deaf spider alert
here!)

d

--
Pearce Consulting
http://www.pearce.uk.com

"Don Pearce" wrote in message
...
On Wed, 30 Aug 2006 12:21:01 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
.. .
On Wed, 30 Aug 2006 11:30:34 +0100, "Keith G"
wrote:


Forget all the theories Don, it was a short either in the cart or the
wiring. No amount of 'waveform analysis' was going to beat a bit of
tapping
about with a fingertip here....


Whatever it was , it wasn't a short in anything - totally wrong set of
symptoms.



I disagree, the hum started when there was lateral force on the stylus -
suggesting an internal problem stemming from cantilever movement. If not a
'dead short' then summat near enough to induce hum.

No - that would have resulted in a very different sort of buzz - you
would have heard the rapid connection and disconnection noises, and
they would have modulated the sound. None of that was happening. And
shorts don't induce hum - they make the signal stop.


Right this moment I can tap the wires on my V15/V and it will hum, tap it
again and it stops - on and off like a bathroom light. No buzz, no
'disconnection noises'....



Anyway, whatever - *my* suggestion to replace (or refit) the cart appears
to
have been the fix he needed....


Err.... he got the whole thing replaced by Richer. (deaf spider alert
here!)


Err, you didn't see this - posted last night *before* he announced the
replacement:

--------------------------------------------------------

Muting circuit...?? (Debut...??)

Pretty obvous it's the cart and/or the wires to the cart, I would have
thought. The OP needs to try another another one or at least remove the
one
he's got and try re-fitting it...

'Twas a Richer Sounds 'OpenBox' jobbie! £20 off and cat hairs to boot.
Last in the shop at the time. I've returned it and got a brand new one
no quibbles. I'll give it a spin tomorrow!

Lordy
-------------------------------------------------------


(Blind Spider Alert....???)