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Thread: Philips GP390 Ceramic cartridge NOS 1970s

  1. #11
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

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    I'm AudioAl'sArbiterForPISHANTO.

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    Yes, and very nice it was, too

    Regarding the GP390, that's one long, heavy (and stiff) cantilever on there... Don't think I've ever seen anything like that before, which I suspect will be significantly influencing the sound, especially in terms of the lengthy run-in time, as the suspension will take a while to 'loosen up' and become more compliant.

    In terms of the current bright sound, Jerry, have you tried adding some mass to the headshell? I've got a feeling that these ceramics will like a big of mass, in the way of a DL-103, and I suspect that if you try that, perhaps by fitting the cartridge into a heavier headshell, it will tame the treble a bit...

    Just a thought!

    Marco.
    http://www.thestainedglasscompany.com

    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do" -- Milan Kundera.

  2. #12
    Join Date: Jan 2008

    Location: Forest of Dean, Glos & Cambrian mountains, Wales

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    OK - thanks for the tips, Marco.
    I'll have a play around with adding a bit of mass to the headshell.
    Jerry

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  3. #13
    Join Date: Jan 2008

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    Cool - let us know how you get on...

    To save disturbing things too much, maybe try blu-tacking a 2p coin to the top of the headshell, just to see what happens, and if the result is favourable, keep adding more mass until the sound becomes 'thick and heavy', then back it off until the sound clicks into place, in terms of openness and bass weight. Then when you've arrived at the right amount of mass, measure it on some scales and then fit the cartridge to a headshell of the same mass (this obviously presumes the use of a detachable headshell arm).

    Another thing, what are you guys tracking the cartridge at? The quoted range is rather wide to say the least (1.5-3g). If it were me, I'd be using it at the top of that range, say 2.5g, and taking it from there. I suspect that this cartridge will prefer a higher VTF, to a lower one.

    Therefore, in summary, up the headshell mass and raise VTF, and see what happens!

    Marco.
    http://www.thestainedglasscompany.com

    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do" -- Milan Kundera.

  4. #14
    Join Date: Jan 2008

    Location: Forest of Dean, Glos & Cambrian mountains, Wales

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    I'm Jerry.

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    Yes, the old 2p + blu-tac on the headshell trick. That's what I was going to do.

    Sharif did mention tracking weight ...

    Quote Originally Posted by Audioflyer View Post
    Just another thing start the tracking at 1.7g and increase it by 0.1g and have a listen each time, I settled for a tracking weight of 2.1g.

    Sharif.
    I'm currently at 1.7g, which was Sharif's original reccie, I think.
    But I shall certainly experiment.
    Jerry

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  5. #15
    Join Date: Jan 2008

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    With VTF, Jerry, I always start near the top of the recommended range and work down, especially with carts fitted with a spherical stylus (such as the Philips), which are designed to take high VTFs, and usually respond well to them. With a nice fat tip like that, tracking at, say, 3g, you don't have to worry so much about record wear.

    So don't be afraid of going high! You may find that something around the 2-5-2.7g mark is spot on

    Marco.
    http://www.thestainedglasscompany.com

    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do" -- Milan Kundera.

  6. #16
    Join Date: Oct 2011

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    I'm Sharif.

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    Hi Jerry

    My thorens TP90 arm mass is 17.5g, and the cartridge headshell is parallel to the record surface.

    The info I've found on a india electronics/audio web sites put out by Phillips is to set the tracking weight between 1.7 -2.5g

    Sharif.

  7. #17
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

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    Have you tried it at the higher end of the range, Sharif, at say 2.7g (it does say you can take it up to 3g)?

    Interestingly, your Thorens arm (if that figure is correct) seems to be heading more towards the high-mass end of things.

    Marco.
    http://www.thestainedglasscompany.com

    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do" -- Milan Kundera.

  8. #18
    Join Date: Jan 2008

    Location: Forest of Dean, Glos & Cambrian mountains, Wales

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    My arm's effective mass is specced at 16g, but I am using a lightweight headshell at the moment.

    I'll have a play around with added mass and VTF this evening.

    For the moment, I've hoisted the VTF up to 2.5g.
    Jerry

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  9. #19
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    Does it sound any better at 2.5g?

    Marco.
    http://www.thestainedglasscompany.com

    "A man is a success if he gets up in the morning and gets to bed at night, and in between he does what he wants to do" -- Milan Kundera.

  10. #20
    Join Date: Jan 2008

    Location: Forest of Dean, Glos & Cambrian mountains, Wales

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    I'm Jerry.

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    errr ... not sure.

    A parcel arrived containing a new toy, Duncan's 300wpc Apart One amp.

    NEW TOY

    Will get back to the Philips ceramic business later

    Jerry

    Spotify Premium streaming, Wadia 151 PowerDAC, Speakers: MBL 116F.

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