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Thread: Pioneer A400 Upgrade Help Required

  1. #11
    Join Date: Nov 2010

    Location: Chorley, Lancs

    Posts: 1,947
    I'm Mike.

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    Quote Originally Posted by Andre View Post
    A bigger imporovement for the PSU cap would be slit foils, i physically can't get em in my Quad
    Not sure if the split foils will fit directly on the board, i may be able to mount them on a seperate board and mount them horizontally, then run connectors to the main board, this would also mean that i could mount the 4 parallel caps and the rectifier could be changed, if it can be done it would be a much tidier job, but space is the major factor.


    As the late Colonel Sanders once said
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  2. #12
    Join Date: Dec 2008

    Location: Yorks

    Posts: 16,649
    I'm Nobody.

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    Snap in's 10mm centres The cans are 35mm Dia x 60mm Tall !

    Another option is the Kendeil KO5 caps, not slits but very good & smaller, i just fitted a pair in another amp yesterday, the amp sounds tons better

  3. #13
    Join Date: Nov 2010

    Location: Chorley, Lancs

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    I'm Mike.

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    Quote Originally Posted by Andre View Post
    Snap in's 10mm centres The cans are 35mm Dia x 60mm Tall !

    Another option is the Kendeil KO5 caps, not slits but very good & smaller, i just fitted a pair in another amp yesterday, the amp sounds tons better
    The 2 caps on the board at the moment are ELNA's 30mm dia x 40mm, i have a maximum of 60mm from the board to the lid, so instead of mounting the new caps on the board i will clip them to the chassis and run leads to the pcb, which will mean i can use just about any cap i want


    As the late Colonel Sanders once said
    "I'm too drunk to taste this chicken!!"

  4. #14
    Join Date: Oct 2013

    Location: Wrexham

    Posts: 920
    I'm Darren.

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    See you're back on AoS Mike, how did you get on with this? I've just picked up an A400 myself.
    Darren.
    Analogue.
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  5. #15
    Join Date: Feb 2013

    Location: Lincoln. United Kingdom

    Posts: 5
    I'm John.

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    Quote Originally Posted by Jac Hawk View Post
    The 2 caps on the board at the moment are ELNA's 30mm dia x 40mm, i have a maximum of 60mm from the board to the lid, so instead of mounting the new caps on the board i will clip them to the chassis and run leads to the pcb, which will mean i can use just about any cap i want
    Sorry very late to the party, Need to upgrade my A400 and am looking for any help. I have seen a suggestion that replacing the ceramic capacitors for film capacitors gives huge improvement in sound can anybody suggest which film capacitor is best to use. Any other suggestions would be appreciated.

  6. #16
    Join Date: May 2008

    Location: Surrey

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    I'm Rob.

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    I think it was Tom Evans of Trichord that did the A400 GTE and possibly other upgrades to the A400. Here is a link to an old thread on PFM that you might find interesting.

    https://pinkfishmedia.net/forum/thre...ecrets.108523/

    I had a Trichord Genesis CD player (based on a Pioneer player) and Tom Evans was offering further upgrades and I had a chat with him about them. Might be worth giving him a call about your plans for the A400

    This is his website : http://www.audiodesign.co.uk/
    Buy Bose...And get your parking validated!.

  7. #17
    Join Date: Feb 2013

    Location: Lincoln. United Kingdom

    Posts: 5
    I'm John.

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    Quote Originally Posted by Puffin View Post
    I think it was Tom Evans of Trichord that did the A400 GTE and possibly other upgrades to the A400. Here is a link to an old thread on PFM that you might find interesting.

    https://pinkfishmedia.net/forum/thre...ecrets.108523/

    I had a Trichord Genesis CD player (based on a Pioneer player) and Tom Evans was offering further upgrades and I had a chat with him about them. Might be worth giving him a call about your plans for the A400

    This is his website : http://www.audiodesign.co.uk/
    Thanks puffin the pinkfishmedia article was very interesting, I wish I had studied electronics in my youth. I am Ok with a soldering Iron but electronic knowledge is very basic. I propose to replace the Ceramics with Polystyrene can anybody say if that is a good move.

  8. #18
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 4,859
    I'm Alan.

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    Yes polystyrene is a very good choice. Just make sure the voltage rating is adequate for the intended position, as some polystyrene are only rated at 50V.

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