Nap 72 phono card check

Hi Mike,

a moving magnet cartridge would overload an moving coil input card. Running a typical low output moving coil cartridge into an moving magnet input would give a very low output level. Are you sure your 72 actually has a phono card? What you describe sounds a little bit like running a cartrigde into an line level input.

No idea how to open the case, though. But there are surely many other around here who do.

+1 to that. Does it sound balanced in terms of frequency response, if it goes loud enough to tell? If it sounds very 'tinny" with no bass then that would fit with no phono card, as it would suggest the RIAA equalisation is not being applied. But if it sounds correct frequency-wise then it would suggest something else wrong (but not MM cart into MC input).

It's usually undoing the screws in the rubber feet

but this is an opportunity for your dealer to engage with you and show you how much they love you as a customer.  

Yes, just unscrew the rubber feet and slide the case off.

Just be careful when sliding out the inner tray so you don't catch the polycarbonate fascia and chip it - all too easily done!

Your K9 cart requires NA322 MM boards.

To minimise the risk to the front fascia, push the rear panel into the case - rather than the other way around. The fascia then doesnt get dragged all through the case.

Hi guys just looked inside my Nap 72, it has no phono cards!!! Do Naim still make them? Or does anybody

Cheers Mike

The well known Naim dealer tomtom has them, I think. I just swapped some boards with them for my NAC52

The NA3xx boards are no longer made however there are many, many sets out there so I'm sure they won't be hard to find, either at a dealer, or through other places where secondhand Naim bits are sold.  The last version of MM boards were NA322/4.  

it looks like tomtom has some in stock -- 137 pounds (I presume for a pair?)

[@mention:1566878603947292] - At £137 I would hope its a pair... lols.  I cannot 'see' them on TomTom myself, though.... (just checked).

The NA3xx boards came 'free' with all 32/42/62/72 pre's. My 42N was £207, back in 1982.... 

The later NAC72s didn't necessarily come with phono boards fitted as standard.  Ebeneezer, please do check whether yours has links on the main board - these make it a line level input without the need for line level cards.  If so, these need to be cut before daughter phono boards are fitted.

[@mention:1566878603942595] - Ah, interesting. I know later 72's had only 1 set of BNC's (vs 2 sets in the first version). I also recall that my 102 came without Phono Boards and similarly needed to have links cut internally, to enable the 5xx phono boards.

tomtomaudioshop, naim parts, phono accessories

[@mention:1566878603947292] - All  those are 'new' 5xx series. 

Still worth a call/email to TomTom or indeed any dealers. They are known to have "squirrel" stores of old bits. 

Alternatively, thinking in the box...

If your K9 has some age it maybe past it's best (?)

And if obtaining good working NA322 boards is difficult, you should consider replacing the K9 for a new MC cart, and buying a nice pre-owned 'S' type Prefix, they are still around for bargain money considering the upgrade potential they give.

You will need a power supply [such as hi-cap] for a Prefix, and possibly dealer assistant to fit, so this all becomes a far more expensive way of sorting out the LP12, but a jolly good excuse to get the fruit box tuned up to spec, which it will need to compete along with your CDS player : )

Debs

My dealer (in Germany) has a set of 323 MC and 328 variable line boards available. Maybe not that interesting to the OP, but given Debs thoughts about the K9, not completely off base.