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Thread: B&k 3010 function generator

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    B&k 3010 function generator

    The sine, square, & triangle waves produced by my unit are not a steady frequency. Viewed on the o-scope they have a slight compression/expansion effect and prevents me from making the adjustments shown in the manual.
    Anybody care to offer a possible solution?

    3010_manual.pdf

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    Lifetime Member Enzo's Avatar
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    Can you hear this? Any chance it is a triggering issue on the scope?

    Are all the power supplies CLEAN, and up to voltage?

    The manual is nice, but there is no schematic in it that I see.

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    Yes I can hear it pulsing, and only at a certain freq position does it clean up at all.
    I measured the voltage supply's to the LM324 chips.
    1 measures +24v, and - 5v, the other is -20v and +5v
    I suppose therein lies the problem, as they should be similar and more less equal I think.
    I'll try tracing the circuit back to see if I can find what's wrong.
    Be great to have a schematic but I've had no luck finding one.

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    Lifetime Member Enzo's Avatar
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    See if that -20v line has excess ripple on it. You might have a beat frequency happening between signal and ripple.

    Did you google B&K 3010? I just did, and first hit at the top was the Boat Anchor Archive, which included your schematic.

    http://bama.edebris.com/download/b&k...schematics.pdf

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    Thank you! Indeed that was the problem and after changing the cap, was able to make the calibration. All good
    Thanks again!

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    Lifetime Member Enzo's Avatar
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    Almost like I had super powers...

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    Education is what you're left with after you have forgotten what you have learned.

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    Don't forget the joker g1's Avatar
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    Doesn't seem too far-fetched. Clearly you can already fly, with much grace and elan.

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    "Everything is better with a tube. I have a customer with an all-tube pacemaker. His heartbeat is steady, reassuring and dependable, not like a modern heartbeat. And if it goes wrong he can fix it himself. You can't do that with SMD." - Mick Bailey

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    Lifetime Member Enzo's Avatar
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    Have you seen Grace lately?

    Click image for larger version. 

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