Stylus or cart for weird Japanese tt

astrojet

Member
2013-04-25 5:52 am
Hi all.
Does anyone know where I could find a replacement stylus for this cartridge (Toshiba 404s cd4) which is a quad compatible electret condenser cartridge from a Toshiba SR-510c? If you don't know but have suggestions for places to try in Tokyo, that would be appreciated as well.
Huge thanks for any and all help!
 

Attachments

  • cond_cart.jpg
    cond_cart.jpg
    103.7 KB · Views: 174
  • ttmod.jpg
    ttmod.jpg
    65.1 KB · Views: 167

adason

Member
Paid Member
2004-11-10 8:31 pm
Maryland
No idea about japanese places, never been there, but would love to...
Question...do you need it to be quad? Do you actually listen to quad records, with quad decoder using quad preamp with quad speakers powered with quad amp...?
If yes, fine. But if no, you can just replace it with about any cartidge, depending on your needs and budget.
 
Quad is the manufacturer not the system. Quadraphonic is a system of detecting the phasing between the left and right tracks of an LP or vinyl recording to make the rear channels. Outdated by the Dolby Digital system and many more.
These were manufactured in Cambridge, Great Britain back in the 70's.
I agree a Shure or AudioTechnica will be fine. How deep the pocket is determines the spending power that does not always determine the quality.
Like boat spares, mention marine and a £100 battery charger becomes £500 for the same model. Mention Audiophile and the same happens. Don't get fooled!
 

astrojet

Member
2013-04-25 5:52 am
Thanks for the tip JonSnell.

No current quadrophonic use (but thinking about it). However, The electret condenser is pretty special and uses an internal step-up/eq. A MM is definitely not plug-and-play with the condenser eq. The table also has an RIAA circuit, but this doesn't seem to be working perfectly.
 

billshurv

Member
Paid Member
2014-03-01 11:53 pm
Quad is the manufacturer not the system. Quadraphonic is a system of detecting the phasing between the left and right tracks of an LP or vinyl recording to make the rear channels. Outdated by the Dolby Digital system and many more.

You sure, That looks like a P-mount quadrophonic cartridge. Nothing to do with QUAD the company in huntingdon.

To the OP: That's a P-mount, so you could go with any P-mount cart and a std phono stage IF you wanted to.
 

kevinkr

Administrator
Paid Member
CD-4 is a discrete 4 channel quadraphonic system and uses a separate FM carrier for the rear channel modulation, playing a CD-4 recording with a conventional cartridge will wipe the carrier off the disk in short order. The other two SQ and QS are matrix based quad and used the instantaneous phase relationships between the two channels to determine what channel was being played at any given moment. The better decoders used a combination of amplitude and phase information to steer the signal to the appropriate channel. Separation was not very good.

I find it extremely difficult to believe that Acoustical Manufacturing Corp (Aka Quad) in that time frame had anything to do at all with the design and manufacture of phono cartridges sold on japanese turntables. Panasonic (Matushita) for example made a whole bunch of strain gauge based CD-4 cartridges in Japan. It would be like bringing coals to Newcastle imho.

In the 1970s in the U.S. anyway, "QUAD" was understood to refer primarily to quadraphonic sound, most non-audiophiles in here had never heard of QUAD (the company), although it is very well known and respected in audiophile circles. The cartridge in question is a CD-4 Quadraphonic cartridge, which I doubt was made by Toshiba, more likely Panasonic, AT or Denon, or perhaps one of the many more obscure makers that have existed and continue to exist in Japan to this day.

To the OP, have you looked at what Jico has to offer? http://www.jico-stylus.com/
(Note I was not able to find a match) You may want to investigate further and look to Japanese sellers for possible sources.

https://quadraphonicaudio.wordpress.com/2009/07/12/cd-4/

http://www.4channelsound.com/cd-4.htm


This doesn't appear to be a P-Mount cartridge and can be replaced with any standard cartridge.
 

astrojet

Member
2013-04-25 5:52 am
Thanks a lot for all the info, everyone.

I realize I can plop a standard cartridge in. It even has a standard screw-type headshell coupling. I've tried this with a Shure m97xe and a Hagerman phono stage and the sound wasn't as good as with the condenser cartridge before the stylus broke. This is my rationale for trying to replace the 404s. I want to relegate replacing the whole signal chain to last resort.