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Thread: Mods list for Pioneer PDS?

  1. #1
    Join Date: Feb 2014

    Location: Huntingdonshire

    Posts: 1,413
    I'm Andrew.

    Default Mods list for Pioneer PDS?

    I now have the Champers cdp that will hold me for a while, need a matching tt now fcs!
    However happy I am with it in stock form I do have the need to mod the crap out of it. Does anyone know of any pages or sites I might scour?
    I've done the usual and had a look at Mr Fikus' site and he doesn't do much more than lamp a similar deck.
    Is there a way I might strip away some digital tomfoolery?

    Bloody pics, hang on!

  2. #2
    Join Date: Feb 2014

    Location: Huntingdonshire

    Posts: 1,413
    I'm Andrew.

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    Somewhere is my pic of my Pioneer PDS-801 looking at home with the Sony.
    Attached Images Attached Images

  3. #3
    Join Date: Feb 2014

    Location: Huntingdonshire

    Posts: 1,413
    I'm Andrew.

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    Typical, a go ogle of the PD-S802 brought me to a thread on here.
    Couple of transferable hints though and there aint nothing like the smell of solder to get my creative side going...

  4. #4
    Join Date: Dec 2011

    Location: South downs

    Posts: 3,477
    I'm James.

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    My bog standard mods for the average player are:

    Fit OPA2134 opamps, remove output coupling capacitors, Panasonic FC/FM before regs & Elna Silmic II after.... Makes a positive improvement every time & pretty cheap to implement. I don't like removing the muting transistors but lots do.

  5. #5
    Join Date: Feb 2014

    Location: Huntingdonshire

    Posts: 1,413
    I'm Andrew.

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    Muting trannies and caps are my first victims usually and as such are now gone. First cdp I did that on was a cd50, scared the poop out of me when I turned it on first time but no pops with this deck.
    I'm looking at LM4562 or OPA2227 to replace the op amps, seem a popular pair although I shall look at your suggestions too now.
    I'm also going to replace the cack ribbon connectors with actual wire type wire.
    Power supply seems pretty good but I may do some cap upgrades in there as well as around the dacs.
    Would you believe Amazon list the op amps? Much easier than cpc/farnell to search too.

  6. #6
    Join Date: Dec 2011

    Location: South downs

    Posts: 3,477
    I'm James.

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    I've just had a proper look at the SM & if it were me...

    IC854/855 are the I-V converter amp, you want the best quality opamps you can get... Its got 5532's fitted currently. OPA2604 would be my choice, they are a drop in replacement & the distortion spectrum has even harmonics predominating giving a "pleasant" sound. OPA2134 are also very good but less coloured.

    C883/884 are the output coupling caps, best removed & a jumper fitted in their place... Your Sony amplifier has input coupling caps so it'll be fine.

    C885/886 are the parallel output filtering caps, if ceramic remove them. They render everything flat, dull & tonally grey.

    C879/880/881/882 are the opamps local power supply caps, fit something decent here like Nichicon KZ or Elna Cerafine.

    C869/870/877/878 are the opamp feedback caps, fit polystyrene or polypropylene here if not already.

    Q840/855 are the muting transistors, remove or leave... Up to you but i think you already have done.

  7. #7
    Join Date: Feb 2014

    Location: Huntingdonshire

    Posts: 1,413
    I'm Andrew.

    Default

    Nice, cheers for the input James. Current thoughts are focused on making this cdp nos. Its quite tricky as I can't see that anyone has done this so I'm making it up as I go along.
    Had to leave it for now as its making my head hurt and my mouth swear.
    I've a Sony mds on the way to act as a dac via the optical out while I feck around with the rest of it.
    Actually praying I get a job soon so I can give up on this "project", hit the web and find a nice Champagne ES cdp.

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