Paging hi-fi/electronics chaps

Discussion in 'UK Motorcycles' started by Champ, Apr 24, 2009.

  1. Champ

    Champ Guest

    My trusty Rotel amp is playing up. It keeps dropping one channel.
    I've noticed that if I switch it quickly off and on again, the channel
    comes back, which makes me think it's something internal to the amp.

    The Amp is an RA930AX, and is getting on for 20 years old, and was
    long ago retired to powering music in my office. But I still use it
    quite a lot [1]

    Anyway, the question is this - is it likely to be something easy to
    fix? Could I possibly fix it myself? Is it worth taking in for
    repair? Or should I just go to Richer Sounds and buy their best buy
    offering (currently a Cambridge Audio A1 VERSION 3 for 70 quid).


    [1] like right now to listen to the CD that's just arrived of Some
    Enchanted Evening by Blue Oyster Cult. Which I really just bought for
    the track Godzilla. Altogether now..."Oh no, there goes Tokyo..."
     
    Champ, Apr 24, 2009
    #1
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  2. Champ

    Krusty Guest

    Try sitting it upside down.

    --
    Krusty

    '03 Tiger 955i
    '02 MV Senna (for sale) '96 Tiger (for sale)
    '79 Fantic Hiro 250 (for sale) '81 Corvette (for sale)
     
    Krusty, Apr 24, 2009
    #2
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  3. Champ

    ginge Guest

    No idea on the mending, but I've got one of those in the study, and it
    does a great job fwiw.
     
    ginge, Apr 24, 2009
    #3
  4. Champ

    CT Guest

    Well...in a way, sort of, but no, not really :eek:)
    Indeed. Exactly that happened to me with a Sony CD player, many years
    ago.
    Which obviously helps stimulate the economy. It's win win!
     
    CT, Apr 24, 2009
    #4
  5. Champ

    Champ Guest

    Not tried that, but I'm up for it!

    Actually, I usually leave the thing switched on, which means it's on
    for week if not months at a time. But, having switched it on and off
    half a dozen times this afternoon, it's now behaving itself. Hmmm.
    A question to you and Jim - how does one spot a dry solder joint? Or
    are you suggesting that the tapping with the biro is itself enough?
     
    Champ, Apr 24, 2009
    #5
  6. Champ

    ogden Guest

    Whenever the subject of repair vs replace comes up, it reminds me of the
    film Goodbye Lenin.
     
    ogden, Apr 24, 2009
    #6
  7. Champ

    Catman Guest

    You need it turned on, but you should be able to hear it through the
    speakers, if you're lucky.

    --
    Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
    Tyger, Tyger Burning Bright (Remove rust to reply)
    116 Giulietta 3.0l Sprint 1.7 145 2.0 Cloverleaf 156 V6 2.5 S2
    Triumph Sprint ST 1050: It's blue, see.
    www.cuore-sportivo.co.uk
     
    Catman, Apr 24, 2009
    #7
  8. Champ

    Catman Guest

    Yeah, should really be a plastic biro :)


    --
    Catman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3
    Tyger, Tyger Burning Bright (Remove rust to reply)
    116 Giulietta 3.0l Sprint 1.7 145 2.0 Cloverleaf 156 V6 2.5 S2
    Triumph Sprint ST 1050: It's blue, see.
    www.cuore-sportivo.co.uk
     
    Catman, Apr 24, 2009
    #8
  9. Ooh, do they have a branch in deepest darkest Spain? My amp's had it -
    also 20 years old and switches itself on and off at will. Memorex, good
    kit in its day.
     
    Paul Carmichael, Apr 24, 2009
    #9
  10. Champ

    Eiron Guest

    I've got one of those RA930AXs in the junk room.
    It sometimes does the same thing but I threaten it with an aerosol of
    contact cleaner
    and the problem goes away, at least for a while.
     
    Eiron, Apr 24, 2009
    #10
  11. ITYM a cold solder joint. It'll look dull compared to the rest.
     
    michael bothe, Apr 24, 2009
    #11
  12. Champ

    Nige Guest

    For what it is, it could be very easy to fix, or just fucked due to age etc.

    Why not build yourself a nice valve amp from kit form? I know a bloke that
    did this & it sounds lovely.

    --


    Nige,

    Honda VTR1000 SOLD!
    BMW K1200S
    Range Rover Vogue
    Aprilia RSV Mille
     
    Nige, Apr 24, 2009
    #12
  13. Champ

    Nige Guest

    Nope, dry joint

    --


    Nige,

    Honda VTR1000 SOLD!
    BMW K1200S
    Range Rover Vogue
    Aprilia RSV Mille
     
    Nige, Apr 24, 2009
    #13
  14. Champ

    Nige Guest

    Another thing, i saw a full setup of marantz KI Sig kit the other day in one
    of those dosser shops at fucking stupid cheap money. If i had time I would
    have bought the lot as the KI stuff is fucking grand.

    --


    Nige,

    Honda VTR1000 SOLD!
    BMW K1200S
    Range Rover Vogue
    Aprilia RSV Mille
     
    Nige, Apr 24, 2009
    #14
  15. Champ

    zymurgy Guest

    Could be a tarnished contact on a relay if there's one going to the
    speaker, or a dodgy contact on some internal interconnects. If there's
    any edge connectors, or plugs and sockets inside, it's best to reseat
    them.

    Does it happen when you're switching inputs, or does it drop of its
    own accord ?

    Switching problems are easier on the old amps, as you can get in there
    with contact cleaner and sometimes revive them

    As others have pointed out, after trying the above unless you're handy
    with electronics and/or a soldering iron it's probably junk, unless
    you can live with the dropped channel.

    I out all my dodgy solid state electronics/Hi-Fi etc on freecycle now,
    as the charity shops don't accept things with a plug on any more.

    Cheers,

    Paul.
     
    zymurgy, Apr 24, 2009
    #15
  16. Seconded. 1/2 hour with a soldering iron and a lookover for swelling
    electrolytic caps would be worth it. Fixes a lot of things...
     
    Chris Bartram, Apr 24, 2009
    #16
  17. Champ

    wessie Guest

    could be either
     
    wessie, Apr 24, 2009
    #17
  18. Champ

    Champ Guest

    I'm assuming you take the cover off and spray the contact cleaner
    inside?
     
    Champ, Apr 24, 2009
    #18
  19. Champ

    zymurgy Guest

    Gah, on the contacts, that's why it's called *contact* cleaner ..

    Paul.
     
    zymurgy, Apr 24, 2009
    #19
  20. Champ

    Champ Guest

    Cos my *main* hi-fi is in the living room, and works perfectly.

    This is just a second system in my office.
     
    Champ, Apr 24, 2009
    #20
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