Knocking CD 3.5

Hi,

Yes Naim can still service your CD3.5,
If you are worried about the knocking take it down your local Naim Dealer who will take a look at it for you,

If need be they can send it back to Naim for a service..

Maybe there is something lose inside ?

Presumably this is happening on all discs?

I ask; because some discs (if one's ear is close enough to the machine) do make a slight rotational ticking noise.

I've never worked out why, but wonder if the said discs are pressed off-centre and it's the noise of the laser head making rapid side to side movements to track the disc?

If you have substantial knocking on all discs; the transport probably is 'circling the drain'.

However; your 3.5 can be given new life and will come back sounding better than before. I know; because I have a refurbished CD3 with a new transport.

Naim will make other tweaks to bring your baby up to spec.

The bad news is that it can cost in the region of £350.

Good luck.

Thanks JN (and Brighty)

Your right to ask JN because the noise is not on all discs so it could be the same thing as you suggest - I will keep an eye (ear!) on it .

Really glad to know 3.5 still servicable as well .

I feel much more relaxed about things now , and will listen to the music not the transport !

There may by sonmething wrong with the flatcap.

I had a problem with the PSU of my Rotel CDP. It would play OK with the fault, but it sounded as if the disc was being thrown about inside the player. I fixed the PSU fault, it now runs like a Rolls Royce. Try removing the Ftatcap.

Fatcat

Aha - but doesn't the Flatcap only power the ANALOG stages of the player? Therefore it will not effect the transport/rotation noises at all...

My brand new 5 makes a (VERY) quiet ticking noise on a couple of discs - it's as suggested - down to off-centre discs. They made a hell of a lot more noise in my old Rega Planet

BTW - how much of a difference sonically is there with the Flatcap on the 3.5? Thinking about getting a Mk1 one for my CD5??

__________________________
Make your choice, adventurous Stranger;
Strike the bell and bide the danger
Or wonder, till it drives you mad,
What would have followed if you had.

I flatcapped my 3.5 and the result was much smoother and less fatigue on some material. Just sounded more cilvilised.

Ben.

Cool as - that's the only gripe with the 5 - it's not QUITE fully run-in, and though the treble is less graty than the Planet - SOMETHING there is more tiring.

It's not the PRaT though - that's spot on and it can "do" slow, such as Kate Bush' The man with the child in his eyes, as well as it can do Mescaline by 1200 Mics...

__________________________
Make your choice, adventurous Stranger;
Strike the bell and bide the danger
Or wonder, till it drives you mad,
What would have followed if you had.

Dom - The difference with a FC on my 3.5 is very worthwhile. If you can get a cheap one, don't hesitate.

quote:

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Originally posted by Rasher:
Dom - The difference with a FC on my 3.5 is very worthwhile.

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I did hear a rumour that the FC can make "less than ideal" recordings sound, err, not very good. Is this true? I have a few slightly iffy recordings knocking (sorry about the pun!) about?

__________________________
Make your choice, adventurous Stranger;
Strike the bell and bide the danger
Or wonder, till it drives you mad,
What would have followed if you had.

QUOTE]

I did hear a rumour that the FC can make "less than ideal" recordings sound, err, not very good. Is this true? I have a few slightly iffy recordings knocking (sorry about the pun!) about?
[/QUOTE]


How can that be? if its a crap recording , it will sound just like it is , surely . And thanks for the "pun"

I dont actually think my cdp has a problem - I really do think this is the "off center" disc problem - how come I never realised this before? - I would have thought that with modern standards discs should be pretty flawless , or made to very close tolerances

Have you tried removing the FC to see if the tapping reduces.

I have just listened to both my Rotel CD players. I played 5 CDs on both players. In all cases there was a faint ticking which sounded the same for all 5 CDs on both players.
Two of the CDs where CDRs, so I doubt it has anything to do with off centre pressing.

Fatcat

PS. My wife says she prefers me listening to my CDs with that green box not turned on.

quote:

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Originally posted by solid state:
I dont actually think my cdp has a problem - I really do think this is the "off center" disc problem - how come I never realised this before? - I would have thought that with modern standards discs should be pretty flawless , or made to very close tolerances

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You'd be wrong - I've got LOADS of CDs that are off centre, slightly warped or just plain noisy - there are some that actually resonate in my old Rega Planet. I had the misfortune to buy an ex-dem Kenwood CD walkman in the States once that was so finnicky, it would refuse to catalog off-centre discs at all!

CDRs are pressed like any other CD - they have a pre-groove that the recorder "traces" while making a recording, so the discs are just as on or off centre as any normal bought one...

__________________________
Make your choice, adventurous Stranger;
Strike the bell and bide the danger
Or wonder, till it drives you mad,
What would have followed if you had.