On 2006-08-28, Dave Plowman (News) wrote:
In article ,
lordy wrote:
Just breaking in my Project Debut 3 turntable. Nice sound but there is
a lot of turntable noise. Its been a while since I've used a turntable
in anger but I don't remember this much noise on my old Dual 505.

I've uploaded a small mp3 clip (about 10secs) here
http://lordy.org.uk/rising_to_the_top_-_keni_burke.mp3 (*)

The background noise is only present when the stylus hits the vinyl - so
I guess its not a ground issue? Does it sound excessive?

Strange - it's mainly hum which would suggest a ground problem, although
it would be nice if the clip included a bit before the stylus was lowered.

Done. I've re-recorded the clip, and added another clip from another
vinyl source for good measure.

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

I noticed something a bit odd, the hum
only appears when the needle finds the groove. When its skirting around
outside of the groove there is no noise.


It's possible to get induced hum on the cartridge from the turntable motor
which doesn't show with the pickup on the rest.

Thanks.

Can't you find a CD of this performance? ;-)

"Keni Burke - Changes" - cost a few bob! Grr now you've made me spend
some more cash at Amazon marketplace

Lordy

On Tue, 29 Aug 2006 00:29:50 +0100, "Dave Plowman (News)"
wrote:

Strange - it's mainly hum which would suggest a ground problem,
although it would be nice if the clip included a bit before the stylus
was lowered. It's possible to get induced hum on the cartridge from the
turntable motor which doesn't show with the pickup on the rest.

Aren't you seeing the lf stuff?

Only listened to it on the computer speakers. The mains hum is the obvious
thing.

Ah. Look at it in a wave editor. There's HUGE amounts of lf rubbish.

On 2006-08-28, Eiron wrote:
lordy wrote:

You have 6.5Hz, 50Hz and 100Hz components. Check your earthing for a start
and try to keep vibrations away.

Thanks.

.. I've re-recorded the clip and I've noticed something more interesting about
that noise. It only kicks in when the groove is found...

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



Wooden floors are not good. When archiving
your LPs, a high-pass filter at 20Hz will be useful if you can't get rid of
the 6.5Hz resonance.

Cheers,


The Maplin pre-amp is not very good. I haven't done a proper comparison with
my decent pre-amp so it may be psychological, but it sounds 'grainy' to me.

Lordy

On Mon, 28 Aug 2006 23:48:40 GMT, lordy wrote:

Done. I've re-recorded the clip, and added another clip from another
vinyl source for good measure.

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

I noticed something a bit odd, the hum
only appears when the needle finds the groove. When its skirting around
outside of the groove there is no noise.

I'm still seeing loads of stuff below 20Hz, even before the needle
drops. Might your computer or preamp be adding this?

On 2006-08-29, Laurence Payne lpayne1NOSPAM@dslDOTpipexDOTcom wrote:
On Mon, 28 Aug 2006 23:48:40 GMT, lordy wrote:

Done. I've re-recorded the clip, and added another clip from another
vinyl source for good measure.

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

I noticed something a bit odd, the hum
only appears when the needle finds the groove. When its skirting around
outside of the groove there is no noise.

I'm still seeing loads of stuff below 20Hz, even before the needle
drops. Might your computer or preamp be adding this?

I'll check but isnt this par for the course with budget turntables?

Lordy

"lordy" wrote in message
...
Just breaking in my Project Debut 3 turntable. Nice sound but there is
a lot of turntable noise. Its been a while since I've used a turntable
in anger but I don't remember this much noise on my old Dual 505.

I've uploaded a small mp3 clip (about 10secs) here
http://lordy.org.uk/rising_to_the_top_-_keni_burke.mp3 (*)

The background noise is only present when the stylus hits the vinyl - so
I guess its not a ground issue? Does it sound excessive?

Cheers,
Lordy

(*) Captured to my PC via a cheap pre-amp from Maplin, saved me having to
lug my PC into the sitting room!
Currently reduced from £25 to £15 if anyone is interested!
http://www.maplin.co.uk/Module.aspx?...amp&doy=28m 8
Cheaper than the RicherSounds Vivanco pre-amp.

**OK, first mistake: The Debut is already fitted with a phono preamp. It can
only be used with a line level input. I apologise if I have misunderstood
what you are trying to do, but you should be connecting your Debut directly
to an AUX, or line input. If you are still having problems, then look for
external interference sources, make sure you are using a 16 Volt AC power
supply (very important!) and that cartridge wiring is correct.


--
Trevor Wilson
www.rageaudio.com.au



--
Posted via a free Usenet account from http://www.teranews.com

"Trevor Wilson" wrote in message
...

"lordy" wrote in message
...
Just breaking in my Project Debut 3 turntable. Nice sound but there is
a lot of turntable noise. Its been a while since I've used a turntable
in anger but I don't remember this much noise on my old Dual 505.

I've uploaded a small mp3 clip (about 10secs) here
http://lordy.org.uk/rising_to_the_top_-_keni_burke.mp3 (*)

The background noise is only present when the stylus hits the vinyl - so
I guess its not a ground issue? Does it sound excessive?

Cheers,
Lordy

(*) Captured to my PC via a cheap pre-amp from Maplin, saved me having to
lug my PC into the sitting room!
Currently reduced from £25 to £15 if anyone is interested!
http://www.maplin.co.uk/Module.aspx?...amp&doy=28m 8
Cheaper than the RicherSounds Vivanco pre-amp.

**OK, first mistake: The Debut is already fitted with a phono preamp. It
can only be used with a line level input. I apologise if I have
misunderstood what you are trying to do, but you should be connecting your
Debut directly to an AUX, or line input. If you are still having problems,
then look for external interference sources, make sure you are using a 16
Volt AC power supply (very important!) and that cartridge wiring is
correct.

**Oh yeah. Make certain the MC/MM switch is correctly set.

Ignore the other idiots.


--
Trevor Wilson
www.rageaudio.com.au



--
Posted via a free Usenet account from http://www.teranews.com

On 2006-08-29, Trevor Wilson wrote:

"Trevor Wilson" wrote in message
...

**OK, first mistake: The Debut is already fitted with a phono preamp. It
can only be used with a line level input.

**Oh yeah. Make certain the MC/MM switch is correctly set.

Hi Trevor, after a bit of Googling, it looks like you have the "Phono Speedbox"
edition ??

http://www.hifistore.co.uk/product.php?qsProd=PHONOSB

Will check other things though...

Lordy

"lordy" wrote in message
...
On 2006-08-29, Trevor Wilson wrote:

"Trevor Wilson" wrote in message
...

**OK, first mistake: The Debut is already fitted with a phono preamp. It
can only be used with a line level input.

**Oh yeah. Make certain the MC/MM switch is correctly set.

Hi Trevor, after a bit of Googling, it looks like you have the "Phono
Speedbox"
edition ??

**I don't own one, I just fix 'em. All of the Debuts I see are fitted with
an internal phono preamp.


--
Trevor Wilson
www.rageaudio.com.au



--
Posted via a free Usenet account from http://www.teranews.com

On 2006-08-29, Trevor Wilson wrote:

"lordy" wrote in message
...
On 2006-08-29, Trevor Wilson wrote:

"Trevor Wilson" wrote in message
...

**OK, first mistake: The Debut is already fitted with a phono preamp. It
can only be used with a line level input.

**Oh yeah. Make certain the MC/MM switch is correctly set.

Hi Trevor, after a bit of Googling, it looks like you have the "Phono
Speedbox"
edition ??

**I don't own one, I just fix 'em. All of the Debuts I see are fitted with
an internal phono preamp.

Do they have speed controls too?

Anyhow it looks like there are different flavours from that web page.

I did a bit of experimenting, I removed the belt,
the noise only occurs when the motor is on and the needle is either
in the groove, or outside the groove and not moving tangentially/skating.

I then took a record I didnt care much for, put the stylus on it, and
lifted the record clear of the turntable. I still had the noise,
so I guess as you say its electrical problem and not mechanical.

Over in avforums some other people have mentioned this hum, but no
indepth feedback yet!

--
Trevor Wilson
www.rageaudio.com.au