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Sorted: Mains hum on budget turntable...



 
 
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  #11 (permalink)  
Old August 30th 06, 11:46 AM posted to uk.rec.audio
Don Pearce
external usenet poster
 
Posts: 1,822
Default Sorted: Mains hum on budget turntable...

On Wed, 30 Aug 2006 12:40:57 +0100, "Keith G"
wrote:


"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'....


That needs fixing. Nothing to do with Lordy's symptoms, though.



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....???)


Yes I did. He din't get the cartridge replaced, did he? They changed
the whole thing. And the symptoms as described make it clear that the
problem wasn't with the cartridge, but a slight mechanical vibration
of the platter, probably caused by a motor problem.

d

--
Pearce Consulting
http://www.pearce.uk.com
  #12 (permalink)  
Old August 30th 06, 11:57 AM posted to uk.rec.audio
lordy
external usenet poster
 
Posts: 40
Default Sorted: Mains hum on budget turntable...

On 2006-08-30, Don Pearce wrote:

Yes I did. He din't get the cartridge replaced, did he? They changed
the whole thing. And the symptoms as described make it clear that the
problem wasn't with the cartridge, but a slight mechanical vibration
of the platter, probably caused by a motor problem.

d


Hi,probably missed it but I think I posted elsewhere the noise was also
noticeable when I lifted the record clear of the platter with the stylus
still on it, as long as the motor was running.

Lordy
  #13 (permalink)  
Old August 30th 06, 12:00 PM posted to uk.rec.audio
Don Pearce
external usenet poster
 
Posts: 1,822
Default Sorted: Mains hum on budget turntable...

On Wed, 30 Aug 2006 11:57:58 GMT, lordy wrote:

On 2006-08-30, Don Pearce wrote:

Yes I did. He din't get the cartridge replaced, did he? They changed
the whole thing. And the symptoms as described make it clear that the
problem wasn't with the cartridge, but a slight mechanical vibration
of the platter, probably caused by a motor problem.

d


Hi,probably missed it but I think I posted elsewhere the noise was also
noticeable when I lifted the record clear of the platter with the stylus
still on it, as long as the motor was running.

Lordy


Still makes sense - the mechanical shake could be transmitted through
any number of paths.

d

--
Pearce Consulting
http://www.pearce.uk.com
  #14 (permalink)  
Old August 30th 06, 12:01 PM posted to uk.rec.audio
Keith G
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Posts: 7,388
Default Sorted: Mains hum on budget turntable...


"Don Pearce" wrote


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'....


That needs fixing. Nothing to do with Lordy's symptoms, though.



That cart's coming off, so I'm not paying it any attention.



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


Yes I did. He din't get the cartridge replaced, did he? They changed
the whole thing. And the symptoms as described make it clear that the
problem wasn't with the cartridge, but a slight mechanical vibration
of the platter, probably caused by a motor problem.



I'm bloody losing it - I read his response to my suggestion as a 'cartridge
replacement'....!!??

In that case - duff motor then!! No..??

(Easy innit...?? ;-)




  #15 (permalink)  
Old August 30th 06, 12:03 PM posted to uk.rec.audio
Don Pearce
external usenet poster
 
Posts: 1,822
Default Sorted: Mains hum on budget turntable...

On Wed, 30 Aug 2006 13:01:52 +0100, "Keith G"
wrote:

I'm bloody losing it - I read his response to my suggestion as a 'cartridge
replacement'....!!??

In that case - duff motor then!! No..??

(Easy innit...?? ;-)




Time for a cuppa, methinks..

d

--
Pearce Consulting
http://www.pearce.uk.com
  #16 (permalink)  
Old August 30th 06, 12:26 PM posted to uk.rec.audio
Keith G
external usenet poster
 
Posts: 7,388
Default Sorted: Mains hum on budget turntable...


"Don Pearce" wrote in message
...
On Wed, 30 Aug 2006 13:01:52 +0100, "Keith G"
wrote:

I'm bloody losing it - I read his response to my suggestion as a
'cartridge
replacement'....!!??

In that case - duff motor then!! No..??

(Easy innit...?? ;-)




Time for a cuppa, methinks..





You're not kidding - I'm actually digging out a new vegetable bed and I've
been hacking away at *granite* and tree roots all bloody morning! (I
collapse at the computer to get my breath back from time to time and zip
through the posts - getting it wrong it would seem!! :-)

http://www.apah69.dsl.pipex.com/show...ie%20Patch.JPG

Anyway, that's my excuse....!!

;-)





  #17 (permalink)  
Old August 30th 06, 12:54 PM posted to uk.rec.audio
Don Pearce
external usenet poster
 
Posts: 1,822
Default Sorted: Mains hum on budget turntable...

On Wed, 30 Aug 2006 13:26:49 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
...
On Wed, 30 Aug 2006 13:01:52 +0100, "Keith G"
wrote:

I'm bloody losing it - I read his response to my suggestion as a
'cartridge
replacement'....!!??

In that case - duff motor then!! No..??

(Easy innit...?? ;-)




Time for a cuppa, methinks..





You're not kidding - I'm actually digging out a new vegetable bed and I've
been hacking away at *granite* and tree roots all bloody morning! (I
collapse at the computer to get my breath back from time to time and zip
through the posts - getting it wrong it would seem!! :-)

http://www.apah69.dsl.pipex.com/show...ie%20Patch.JPG

Anyway, that's my excuse....!!

;-)

So Swim forgot your fruit gums once too often, did she? ;-) You're
supposed to do that in the dark.

d

--
Pearce Consulting
http://www.pearce.uk.com
  #18 (permalink)  
Old August 30th 06, 01:20 PM posted to uk.rec.audio
Keith G
external usenet poster
 
Posts: 7,388
Default Sorted: Mains hum on budget turntable...


"Don Pearce" wrote in message
...
On Wed, 30 Aug 2006 13:26:49 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
.. .
On Wed, 30 Aug 2006 13:01:52 +0100, "Keith G"
wrote:

I'm bloody losing it - I read his response to my suggestion as a
'cartridge
replacement'....!!??

In that case - duff motor then!! No..??

(Easy innit...?? ;-)




Time for a cuppa, methinks..





You're not kidding - I'm actually digging out a new vegetable bed and I've
been hacking away at *granite* and tree roots all bloody morning! (I
collapse at the computer to get my breath back from time to time and zip
through the posts - getting it wrong it would seem!! :-)

http://www.apah69.dsl.pipex.com/show...ie%20Patch.JPG

Anyway, that's my excuse....!!

;-)

So Swim forgot your fruit gums once too often, did she? ;-) You're
supposed to do that in the dark.




No, it ain't like that! ;-)

But forget the fruit gums - we could be looking at a *Harley* for this
one...!!

(OK, or a cheaper 'knock-off' - the work's a bit tough and I'm on a sodding
pickaxe now, but the pay's *good*.... !! :-)




  #19 (permalink)  
Old August 30th 06, 01:25 PM posted to uk.rec.audio
Don Pearce
external usenet poster
 
Posts: 1,822
Default Sorted: Mains hum on budget turntable...

On Wed, 30 Aug 2006 14:20:22 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
...
On Wed, 30 Aug 2006 13:26:49 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
. ..
On Wed, 30 Aug 2006 13:01:52 +0100, "Keith G"
wrote:

I'm bloody losing it - I read his response to my suggestion as a
'cartridge
replacement'....!!??

In that case - duff motor then!! No..??

(Easy innit...?? ;-)




Time for a cuppa, methinks..




You're not kidding - I'm actually digging out a new vegetable bed and I've
been hacking away at *granite* and tree roots all bloody morning! (I
collapse at the computer to get my breath back from time to time and zip
through the posts - getting it wrong it would seem!! :-)

http://www.apah69.dsl.pipex.com/show...ie%20Patch.JPG

Anyway, that's my excuse....!!

;-)

So Swim forgot your fruit gums once too often, did she? ;-) You're
supposed to do that in the dark.




No, it ain't like that! ;-)

But forget the fruit gums - we could be looking at a *Harley* for this
one...!!

(OK, or a cheaper 'knock-off' - the work's a bit tough and I'm on a sodding
pickaxe now, but the pay's *good*.... !! :-)


I think I'd have been tempted to hire a mini-digger for the day. Loads
of fun, they will go through quite thick roots.

d

--
Pearce Consulting
http://www.pearce.uk.com
  #20 (permalink)  
Old August 30th 06, 02:06 PM posted to uk.rec.audio
Keith G
external usenet poster
 
Posts: 7,388
Default Sorted: Mains hum on budget turntable...


"Don Pearce" wrote in message
...
On Wed, 30 Aug 2006 14:20:22 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
.. .
On Wed, 30 Aug 2006 13:26:49 +0100, "Keith G"
wrote:


"Don Pearce" wrote in message
.. .
On Wed, 30 Aug 2006 13:01:52 +0100, "Keith G"
wrote:

I'm bloody losing it - I read his response to my suggestion as a
'cartridge
replacement'....!!??

In that case - duff motor then!! No..??

(Easy innit...?? ;-)




Time for a cuppa, methinks..




You're not kidding - I'm actually digging out a new vegetable bed and
I've
been hacking away at *granite* and tree roots all bloody morning! (I
collapse at the computer to get my breath back from time to time and zip
through the posts - getting it wrong it would seem!! :-)

http://www.apah69.dsl.pipex.com/show...ie%20Patch.JPG

Anyway, that's my excuse....!!

;-)

So Swim forgot your fruit gums once too often, did she? ;-) You're
supposed to do that in the dark.




No, it ain't like that! ;-)

But forget the fruit gums - we could be looking at a *Harley* for this
one...!!

(OK, or a cheaper 'knock-off' - the work's a bit tough and I'm on a
sodding
pickaxe now, but the pay's *good*.... !! :-)


I think I'd have been tempted to hire a mini-digger for the day.




Bugger that - it'd cut into my Harley money....


Loads
of fun, they will go through quite thick roots.



Yes I know (30+ years in the construction industry, remember? ;-), but most
of the roots here are actually quite intelligent....





 




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