KOETSU ROSEWOOD DILEMMA


I have an old Koetsu Rosewood Longbody from long ago. It came with a Linn LP12/Ittok, so cost nothing. But it had no stylus, and I’ve never heard it.

The stylus was sheared clean off. Some colorful fuzz was left at the scene, and forensics showed it to be red and green woolen fibers. The culprit was a clumsy audiophile in a red-and-green sweater (Christmas colors, so maybe too much egg-nog) who snagged the diamond in his cuff.

Despite the violence, the cantilever is perfect — straight and true, with a beautifully beveled flat tip for seating the stone and setting SRA. It’s not hole-through, so probably was an adhesive-only bond. Coils are fine. Suspension seems fine — sitting on a stationary LP at the right VTF, it rides just right, not low nor high — and compliance feels in the right ballpark. All in all it’s very clean, and produces sound. There’s no erosion of the gold plating, so it may have been newish. 91447 is carved into the aluminum, and an “S” — does S indicate a “signature” model?

Is it worth retipping?

As you can see, I know nothing, so any suggestions are welcome, even negative ones, especially from those who know the cartridge, and have experience with retipping.

My intention now is to keep the boron rod and just add a diamond — it should be quite close to the original sound — but I’m open to change. Installing a new cantilever+stylus is easier and less expensive, but the resulting sound is an unknown, maybe better, maybe not, maybe not Koetsu. Why have a Koetsu if it doesn’t sound like one?

Stylus-type is an issue too. I can’t even find what the original stylus was, I believe a type of hyper-elliptical. I think a fancier cut would add detail but not alter the sound otherwise, but might be wrong.

So — as I know nothing, and my few ideas may be wrong, guidance is needed.


128x128bimasta

Showing 4 responses by nandric

@bimasta , ''Expert stylus'' in UK is the only retipper I know

who does ''stylus alone'' retip. Besides they produce their own

styli called ''Paratrace''. The stylus alone retip cost 180 GBP.

Anyway you will first get their ''report'' reg. the state of your

cart. You can then decide what you want them to do.

This kind of repair is the least ''encumbered'' for the cart

performance .

@invictus, Your option cost 2000 euro. Koetsu does not

''refurbish'' cartridges but put a new generator instead of

the old one. The price, you know, is also of ''some'' consideration.

We all think in the same way but have different assertions which

we use as premises. The first logical rule is that wrong or

false premise can never lead to true conclusions.

The most believe that the stylus is the most important part

so the fear about ''hours of use'' determine our preference

for new or second hand. But one should look at this unclear

notion of ''refurbishing'' from the retipper situation. What parts

he has in his stock, what parts are available and not available

to him. The ''rubber ring'' or suspension, for example , is

more important than stylus shape. The same apply for the

cantilever not to mention coils. No retipper will mess with

coils. If the coils of your cart are defective forget repair

possibility. Think of those ''rubber rings''. How many kinds

are available to a particular retipper? Can carts be ''tuned''

without suspension?

Ergo: the least ''harmful'' repair is the stylus exchange.

@bimasta, you mentioned that your Koetsu has ''perfect''

cantilever. Post your cart to ''Expert stylus'' in UK their

''Paratrace'' stylus is an version of micro ridge. Their

retipper Mr. Hodgson is engineer with 40 years of experience.

Addition. "Expert stylus'' procedure is that one first need

to agree about his turn (> waiting list). After inspection by

Mr. Hodson one will get an report about the cart state and

then decide what kind of recommended work to order.  

The ''inspection fees''  are 30 GBP.  The customer is free

to decide according to his wishes.