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Thread: 70's Ampeg Bass 410 combo

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    70's Ampeg Bass 410 combo

    Ampeg combo has a couple bad filter caps. The old ones are huge.

    4800@60v

    I have 4700 @63 V snap in's which I assume should work fine. They are much smaller though.

    Any reason besides age why the oem caps are the size of 6l6's?

    Is there a different style cap I should use instead?

    Thx in adv

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    Old Timer Leo_Gnardo's Avatar
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    Quote Originally Posted by guitardad View Post
    Any reason besides age why the oem caps are the size of 6l6's? Is there a different style cap I should use instead?
    Cap manufacturers constantly improving the product, now can put more energy storage into a smaller volume. No problem using the snap in ones you have, just adapt the mounting any way you can.

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    Supporting Member loudthud's Avatar
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    I sometimes use the 35mm diameter snap in caps because they fit the old 1-3/8 mounting clamps. 4700uF at 63V is only about 1-1/4 inch high so they look kinda funny.

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    WARNING! Musical Instrument amplifiers contain lethal voltages and can retain them even when unplugged. Refer service to qualified personel.

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    Quote Originally Posted by loudthud View Post
    I sometimes use the 35mm diameter snap in caps because they fit the old 1-3/8 mounting clamps. 4700uF at 63V is only about 1-1/4 inch high so they look kinda funny.
    The ones I have do work, but they are rated at 1.7A ripple current, whereas other larger ones at Digikey are rated at 4.8A ripple current.
    Not usually a spec I concern myself with other than Voltage and Capacity. Does that spec matter much?
    This amp is high power with a 6A and 4A fuse in series. It eats a lot of electrons

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  5. #5
    Supporting Member loudthud's Avatar
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    I would use the higher rated part. It probably costs more, but it will last much longer.

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    WARNING! Musical Instrument amplifiers contain lethal voltages and can retain them even when unplugged. Refer service to qualified personel.

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