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Dynavector cartridges, old and new

For more than 40 years Dynavector has been producing very high quality moving coil cartridges in Japan. Sadly we don't have a dedicated Dynavector thread here on audiogon. It would be nice to collect info about some nice rare models in one topic. 


My first Dynavector was high output model, very attractive headshell integrated as one piece - Dynavector DV-30A was released in Japan 1 year before the Karat series and 4 years before the fabulous Karat Nova. The first high output Moving Coil Dynavector DV-30 series was the next generation of the Ultimo cartridges. The Ultimo’s were manufactured by Onlife Research Inc., which later became Dynavector. The 30-series was introduced in 1978 with 3 different models DV-30A & DV-30B (HOMC) and DV-30C (LOMC). Till the early 80s it was top of the line Dynavector models.... 

But then the KARAT was released with short Ruby and Diamond cantilevers (depends on the model). I've been looking for KARAT for a long time, i found the Dynavector KARAT 23RS special calibrated version with Micro Ridge stylus tip and prism Ruby cantilever. This particular model has been introduced in 1988 and claimed to be superior to the earlier generation of Karat carts. I'd like to seek more info about this rare cartridge, but very little info available online. Anyone can comment on Karat Ruby 23RS mkI (not mkII) ?  

I know some mebers are enjoing the more expensive Karat Nova series, XV-1, XX-2, Te Kaitora Rua etc 

Modern Dynavector site is: http://www.dynavector.com/ 

But the rare models can be found here. 
 

  
128x128chakster
nandric's avatar
nandric
4,086 posts
 

Dear chakster, each cantilever is glued in the so called ''joint pipe''

which is usually made from aluminum. On this ''pipe'' is also

coil glued. Together with the stylus they are also called ''moving

part'' of the cartridge. So we need to include the length of the ''pipe''

by the length  of whatever cantilever.  Then there is the question

if the stylus is glued in the diamond cantilever or if the whole

cantilever/stylus combo is made from one piece of diamond.

I own Sony XL 88 D (D=diamond) with cantilever/stylus combo

made from one piece of diamond. The stylus shape is , I think,

super elliptical. Anyway the ''exotic story'' about the ''exotic

cantilevers'' needs some moderation because of the aluminum

pipe (length) in which the exote's are glued (grin).

 



nandric's avatar
nandric
4,086 posts
 

Addition, I forget my question for Lew. The friction caused

by interaction between stylus and groves produces heat

for which smaller diamonds are more ,say, ''vulnerable'' than

bigger kind. I assume that Newton should explain the

difference and also assume Lew as Newton expert. This may

explain the ''shorter lifetime'' of micro ridge styli ?

harold-not-the-barrel
895 posts
 
We are all ears .....
chakster's avatar
chakster OP
6,144 posts
 
@nandric the advantages of KARAT is that with 100Khz resonance of the cantilever there is no need to use rubber as a damping medium as it used in conventional design. In the KARAT, rubber is used only for seating the cantilever on the pole piece.

SONY cartridges you’re talking about are notorius for suspension/damper problems, so the design is competely different.

P.S. Check my image of KARAT 17DS MR and tell me if you can see any glue.

This is the 23RS MR Ruby version:

https://scontent-arn2-1.xx.fbcdn.net/v/t1.0-9/36226177_2287496551268499_2734494721178075136_n.jpg?_n...
nandric's avatar
nandric
4,086 posts
 

Dear chakster, It is not my intetion to get involved in disputes

about ''either or'' questions. Your Karat 17DS has clearly glued

stylus in the cantilever. The reason is simple. The combo is not

made from one piece of diamond. By one piece diamond the stylus

need to be grinded and polished ''in'' the cantilever , so to speak.

The so called ''rubber ring'' behind the coils has ''suspension''

as function. This function is called compliance. One of the so called

parametres by arm/cart combinations. I have no idea about

resonances in this connetion. Those can be tamed with resistor

networks. Reduction of the ''moving mass'' should not be

exaggerated. I own Ikeda 9 CII which is without cantilever. So

only the stylus moves . However my Allaerts MC 2 sounds better.

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