In article ,
lordy 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.

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 totally lost as to why the hum should only start when the stylus
actually hits a groove.

I look forward with interest to the theories. ;-)

--
*There's no place like www.home.com *

Dave Plowman London SW
To e-mail, change noise into sound.

"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?



Yes.

If you have tried earth on and earth off, gently feel the cartridge leads up
and see if you can induce or stop hum there - the way the wires are dressed
can sometimes cause a hum, as well as other things...

"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

"Trevor Wilson" wrote in message
...

"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.




Interesting. How many have you fixed??

"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 (*)

An ideal sample for this purpose would include segments with no music at
all, and music that was as loud as possible.

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

Agreed.

Does it sound excessive?

Not if the record is very dirty.