Why are they so crappy?
http://www.polkaudio.com/forums/atta...8&d=1171259648

Anyone know how long replacements last?
Is there an improved design that actually works?
Or does everyone fix theirs with metal pins and epoxy?

--
Eiron.

In article , Eiron
wrote:
Why are they so crappy?

Linn. :-)

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html

In article ,
Jim Lesurf wrote:
In article , Eiron
wrote:
Why are they so crappy?

Linn. :-)

Jim

Strange isn't it? I have a Linn pre-amp which works very well but looks
like it should cost 50 quid new - not 10 times that. Not that I bought it
new.

--
*You know you're a redneck if your home has wheels and your car doesn't.

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

On 15/01/2014 12:09, Dave Plowman (News) wrote:
In article ,
Jim Lesurf wrote:
In article , Eiron
wrote:
Why are they so crappy?

Linn. :-)

Jim

Strange isn't it? I have a Linn pre-amp which works very well but looks
like it should cost 50 quid new - not 10 times that. Not that I bought it
new.

I drilled a couple of 1.5mm holes in each hinge and put a split pin in.
I don't know how long it will last.
It looks like the original problem is that the spring end moves back and
forth on each movement and scrapes a hole in the plastic.

--
Eiron.

"Eiron" wrote in message
...
Why are they so crappy?
http://www.polkaudio.com/forums/atta...8&d=1171259648

Anyone know how long replacements last?
Is there an improved design that actually works?
Or does everyone fix theirs with metal pins and epoxy?


I've not got a Linn, I have a PT1 but I've taken the hinges off and simply
lift the lid off when in use.
Who wants a rattly old lid on their turntable when playing records?

D

On Wed, 15 Jan 2014 13:20:17 -0000, "David B"
wrote:

"Eiron" wrote in message
...
Why are they so crappy?
http://www.polkaudio.com/forums/atta...8&d=1171259648

Anyone know how long replacements last?
Is there an improved design that actually works?
Or does everyone fix theirs with metal pins and epoxy?


I've not got a Linn, I have a PT1 but I've taken the hinges off and simply
lift the lid off when in use.
Who wants a rattly old lid on their turntable when playing records?

Looking at the picture, it's quite clear the hinges weren't designed
by an engineer (more like it was something designed by "The Pointy
Haired Boss").

That arrangement for counterbalancing the weight of the lid, assuming
the hinges had been properly designed using metal instead of plastic,
places a very high stress on the back of the lid itself which then
needs to be made much stronger than the rest of the lid.

Assuming the lid is strong enough to carry on using the existing
hinge location for applying the counterbalancing force and assuming
that it's possible to sufficiently dismantle a set of brand new
hinges, one way of reducing the risk of another premature failure
might be to slip a piece of brass sheet (obtainable from model making
stores) in between the spring and the plastic hinge so that the end of
the spring slides over the brass instead of digging into the plastic.

Also, it looks like that end of the spring should have had a 30 deg
bend about 3mm from the end so that the rounded bend slid along the
plastic rather than the sharp edged end which, as it stands, is acting
as a scraper.

TBH, it looks more like the result of "Bean Counteritis" in the
manufacturing process where the original material and spring design
details were changed to reduce manufacturing costs (still a "Pointy
Haired Boss" type of decision though).
--
Regards, J B Good

On 15/01/2014 14:39, Johny B Good wrote:
On Wed, 15 Jan 2014 13:20:17 -0000, "David B"
wrote:

"Eiron" wrote in message
...
Why are they so crappy?
http://www.polkaudio.com/forums/atta...8&d=1171259648

Anyone know how long replacements last?
Is there an improved design that actually works?
Or does everyone fix theirs with metal pins and epoxy?


I've not got a Linn, I have a PT1 but I've taken the hinges off and simply
lift the lid off when in use.
Who wants a rattly old lid on their turntable when playing records?

Looking at the picture, it's quite clear the hinges weren't designed
by an engineer (more like it was something designed by "The Pointy
Haired Boss").

That arrangement for counterbalancing the weight of the lid, assuming
the hinges had been properly designed using metal instead of plastic,
places a very high stress on the back of the lid itself which then
needs to be made much stronger than the rest of the lid.

Assuming the lid is strong enough to carry on using the existing
hinge location for applying the counterbalancing force and assuming
that it's possible to sufficiently dismantle a set of brand new
hinges, one way of reducing the risk of another premature failure
might be to slip a piece of brass sheet (obtainable from model making
stores) in between the spring and the plastic hinge so that the end of
the spring slides over the brass instead of digging into the plastic.

My first attempt at a repair included a shim but it just broke the
plastic elsewhere.
Something like a brass shim to spread the load would be a good idea for
new hinges.

--
Eiron.

In article ,
David B wrote:
I've not got a Linn, I have a PT1 but I've taken the hinges off and
simply lift the lid off when in use. Who wants a rattly old lid on
their turntable when playing records?

It may help prevent feedback at high levels.

--
*Snowmen fall from Heaven unassembled*

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

"Dave Plowman (News)" wrote in message
...
In article ,
David B wrote:
I've not got a Linn, I have a PT1 but I've taken the hinges off and
simply lift the lid off when in use. Who wants a rattly old lid on
their turntable when playing records?

It may help prevent feedback at high levels.


Good point sir.
I've never noticed any but I don't have particularly powerful amplifiers.

D

In article , David B
wrote:
"Eiron" wrote in message
...
Why are they so crappy?
http://www.polkaudio.com/forums/atta...8&d=1171259648

Anyone know how long replacements last? Is there an improved design
that actually works? Or does everyone fix theirs with metal pins and
epoxy?


I've not got a Linn, I have a PT1 but I've taken the hinges off and
simply lift the lid off when in use. Who wants a rattly old lid on
their turntable when playing records?

I certainly would not want a "rattly old lid" on the turntable. That's one
of the reasons I decided I didn't want a Linn. Bought a deck where the lid
works OK without things falling off or being loose. Although that wasn't
the main reason for my choice.

I had to use a Linn for some days at a show back in the 1980s. I got sick
of the 'bumpers' falling off the front, etc. Also the way the mat kept
sticking to the LP when you lifted it. Was IMHO a real pest to use.

So far as I'm concerned a *well made* lid serves a number of purposes.
Mainly reducing how much dust falls onto the LP whilst it is playing.

Slainte,

Jim

--
Please use the address on the audiomisc page if you wish to email me.
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html
Audio Misc http://www.audiomisc.co.uk/index.html