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leeyn

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Posts posted by leeyn

  1. Posted · Edited by leeyn · Report reply

    U can find it at any HomeFix outlet. Look for them in the velcro section. It's green in color.

    cool - THANKS !

     

    i did another mod on the mod suggested.. :-

     

    i cut 4 small leather stripe (1cm length, 3 mm width - should not be easily flameable ?) and padded them below the transformer with the 2 side-screws tightened......

    it looks like a small isolation platform....

     

    wow : guess what - much-much less hum liao....

    almost totally un-audible....unless u popped head very close to it.... :cans:

  3. Posted · Edited by leeyn · Report reply

    isolate the transformer from the chassis further (blue tack) until the hum is no longer audible. U could also employ velvet tape around the chassis in contact with chassis cover to reduce hum.

     

    mackie, thanks.

     

    i afraid the blue-tack (that i knew) wont stand the heat...

     

    personally - i am prepared to sacrifice the dynamics (slightly onli nia!) as compares to those 2 : nasty humming and smelly metalic box.....

     

    thanks, again.

  5. Posted · Report reply

    points taken/noted. today - i manage to reduce the hum by adding a few ferrite cores to the power input line . . . peace ! :party:

     

    I suggest not to use ferrite clamps on interconnects and headphone cables as they tend to stifle dynamics and thus resulting in a dull sound. Treble extension also suffers. However, these detriment may be less noticeable and even beneficial when used on power cords. Let your ears decide.

     

    cool.

  6. Posted · Edited by Mackie · Report reply

    It's a sign of not being patient. The same paint aroma therapy occurs with XiangSheng amp as well but it will dissipate in a week or two on daily use.

     

    I'm afraid by drilling holes on the transformer cover, you have weakened its structure which is supposed to prevent excessive mechanical feedback (vibration) to the rest of the chassis. Anyway, I believe the tubes contributed more heat than the transformer. Hence, the ventilation holes on the cover of the latter do not rectify the heat issue by much.

     

    points taken/noted.

     

    while i do agree to your statement on inpatient - i don't call that aroma therapy ; try google

    "paint and health" and see/read for yourself.....(remember - this is cheap paint from china.)

     

    those 8 holes are small (4mm diameter).... will that still weaken the 'structure' ? the whole thing is still rock-solid as i screw it back on top-chasis.

     

    today - i manage to reduce the hum by adding a few ferrite cores to the power input line . . .

     

    peace ! :party:

  7. Posted · Report reply

    guys , anyone faces this LD2+ problem ?

     

     

    due to the intense heat (hence the cheap-paint smell), i unscrewed & took the transformer-cover off and drilled a few holes on top and side (8 altogether).

     

    i also sand-papered it and resprayed it with better paint (silver) from Nippon Paint. it certainly looks better.

     

    today, i fixed back the transformer-cover, 1.5 hours into listening (hot) -

    no more cheap paint smell (good) , but the LD2+ started a low but audible rattling-like hum (bad). it sounded like old flourocent-light hum - very likely from the transformer section.

     

    it's quite clearly heard if it placed near to the listener....

     

    i did a left-right tubes switch, same problem after 1.5 hours (hot)....

     

    it has the same problem now even with or wothout the cover - argh !

     

    my LD2+ is barely 1 month old...

     

    is this sign of poor quality ? anything can be done ? :rclxub:

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