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Thread: On a whim

  1. #11
    Join Date: Aug 2012

    Location: North

    Posts: 2,649
    I'm Steve.

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    The bottom looks better than the top.
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  2. #12
    Join Date: Nov 2010

    Location: Chorley, Lancs

    Posts: 1,644
    I'm Mike.

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    Well i picked it up from Grays yesterday, i was in London so killed two birds so to speak, anyway like i always do with second hand gear before plugging in and switching on i took the top off to see if everything was ok and to give it a clean, turns out the 2 big caps are blown i contacted the seller on ebay but his response was that sound comes out of it so he can't be held responsible.



    As you can see from the photo the tops of the caps are domed, and you can't see it but they have leaked as well. So what do i do, scrap it or replace the caps?


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

  3. #13
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 35,738
    I'm Geoff.

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    I'd do the caps.

  4. #14
    Join Date: Nov 2010

    Location: Chorley, Lancs

    Posts: 1,644
    I'm Mike.

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    if i'm going to do that Geoff, do you think it would be worth upgrading other components? i presume the 2 big ones that have blown are the smoothing caps so will have some affect on sound quality, but i'd like to know if there is anything else in the signal path worth upgrading, i don't want to go daft and spend a small fortune, maybe someone could make some suggestions?


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

  5. #15
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 35,738
    I'm Geoff.

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    As the board has to be lifted, it may be an idea to replace all electrolytics and run a meter across other components. Give the controls a squirt of cleaner too.

  6. #16
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 45,257
    I'm Grant.

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    Initially if there are no other looking odd I'd just do the big 2. Give the board a clean too Clean the pots. Then see how it is. I take it it's working
    Regards,
    Grant ....

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  7. #17
    Join Date: Nov 2010

    Location: Chorley, Lancs

    Posts: 1,644
    I'm Mike.

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    We are on the same wavelength Geoff, have you seen a parts list or upgrade list for this amp anywhere, i'd like to replace with at least the same but if possible better sounding components, which i know is very subjective


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

  8. #18
    Join Date: Nov 2010

    Location: Chorley, Lancs

    Posts: 1,644
    I'm Mike.

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    It powers up Grant, but as i've never heard a fresh one so to speak i have no gauge as to how it should sound


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

  9. #19
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 35,738
    I'm Geoff.

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    Quote Originally Posted by Jac Hawk View Post
    have you seen a parts list or upgrade list for this amp anywhere
    No, I haven't. A bit of Googling may come up with something.

  10. #20
    Join Date: Apr 2011

    Location: cheltenham

    Posts: 396
    I'm matt.

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    If you like I could pop the lid off my Quad 306 and see what Main smoothing caps Dada electronics supplied with their service kit. I remember looking up the specs and they had a very high ripple current rating, so ideal for amplifiers.

    For smaller caps it would be best to look at a circuit diagram and see what they do. I've tried all sorts of audio grade caps over the years and they all seem to colour the sound in some way. The most neutral I've used for coupling are Nichicon fw - they are dirt cheap too
    Last edited by fatmarley; 23-06-2018 at 18:33.

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