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    .047uf 630v caps? on driver board.

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    dmagazz

    Posts : 115
    Join date : 2018-06-20
    Age : 50
    Location : new fairf, ct

    .047uf 630v caps? on driver board.

    Post by dmagazz on Mon Jul 09, 2018 5:33 pm

    ok, i need some input here.
    i changed out the .05 400v caps for metal poly .047 630v its just about.05, but do'es anyone think i may have issues?

    also im looking to get an oscilloscope,
    im looking at a kenwood 4025(20hz 2 channel) but maybe i should get one with like 100hz.
    no? yes?
    i learn fast, so i dont want to buy a starter unit only to buy a better one anyway.ya know
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    j beede

    Posts : 449
    Join date : 2011-02-07
    Location : California

    Re: .047uf 630v caps? on driver board.

    Post by j beede on Mon Jul 09, 2018 10:02 pm

    0.047µF is 0.05µF unless you are building an xray source for near-zero nanometer semiconductor lithography.

    A 50 MHz Chinese LCD scope (Owon, Siglent, Tektronix, Agilent, etc.) is great for audio frequencies. $300-500 on Amazon. An old 20MHz 2-channel scope won't process/store data or perform waveform math.

    On the other hand... if you believe that only Fluke knows how to count electrons and that Harbor Freight tools will ruin your '63 split window... buy an HP scope or LeCroy WaveSurfer either will do nicely and make your bench look very impressive. That's why I bought my LeCroy  Wink
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    dmagazz

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    Join date : 2018-06-20
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    Location : new fairf, ct

    Re: .047uf 630v caps? on driver board.

    Post by dmagazz on Mon Jul 09, 2018 10:45 pm

    ok, well. thanks j beede, ill keep my eye out for a 50mhz 2 channel jobber.
    and a decent set of p6006 probes.
    i did find a kenwood cs5130 (40mhz) i was looking at.
    a hitachi V665 60MHZ 2 CHANNEL
    also a Tektronix TDS350 2 Channel 200MHz, 1GSa/s
    and then THIS!
    https://www.ebay.com/itm/TEKTRONIX-TAS-250-TWO-CHANNEL-DIGITAL-ANALOG-50MHz-PORTABLE-OSCILLOSCOPE-TAS-250/232841609412?epid=96893624&hash=item36367100c4:g:wMAAAOSwc3RbHYHj

    on the cap, i figured it should be close enough, but for all i knew some of you guys had "things" show up going down instead of up in a value. i only chose those because they were the closest value on dynacoparts.com when i ordered some other stuff.
    again thanks for the advice. by the way. i have jdr-dmm300 for a multimeter, its served its purpose for a good long time,but its been acting up. so im getting a fluke-179, lots of good useable features.
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    aguaazul

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    Join date : 2012-07-08
    Age : 58
    Location : Livermore, CA

    Re: .047uf 630v caps? on driver board.

    Post by aguaazul on Tue Jul 10, 2018 12:09 am

    I grabbed a Rigol DS1054Z Digital Oscilloscopes - Bandwidth: 50 Mhz, Channels: 4 on recommendation of the EEVblog Youtube Channel. Amazon had a great price, there is a firmware patch (hack) that you can use to make it a 1ooMhz. If you go down that road.....
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    Peter W.

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    Location : Melrose Park, PA

    Re: .047uf 630v caps? on driver board.

    Post by Peter W. Yesterday at 7:43 am

    I own a very fine dual-trace 100 mHz Tek scope with all the bells and whistles, and it is even (relatively) easy to use.

    In the 20 years I have owned it, I have *needed* to use it, perhaps, five (5) times. Those times to trace a failed chip in a solid-state device. Never for tube equipment.

    I expect that when I retire and consider getting into aligning solid-state FM tuners, I will have much more use for one. But until then, not so much.

    And, it takes up a LOT of real-estate on the bench.
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    dmagazz

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    Re: .047uf 630v caps? on driver board.

    Post by dmagazz Yesterday at 7:35 pm

    they do take up a fair amount of space dont they.
    i put it on the back burner for now,and i got a decent fluke 179 voltmeter(w/case and 4 attachments) for $145.50
    https://www.ebay.com/itm/-/113148064074?nordt=true&orig_cvip=true&rt=nc&_trksid=p2047675.l10137
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    j beede

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    Join date : 2011-02-07
    Location : California

    Re: .047uf 630v caps? on driver board.

    Post by j beede Yesterday at 8:46 pm

    dmagazz wrote:they do take up a fair amount of space dont they.
    i put it on the back burner for now,and i got a decent fluke 179 voltmeter(w/case and 4 attachments) for $153

    Hence my prior recommendation for a Chinese LCD 50 MHz scope. My LeCroy takes up little more space than a Johnny Quest lunch box. It has bells, whistles, blinking blue lights... it sings, dances, and tells jokes too. It weighs about 6 lbs.

    I use it regularly. Its waveform math functions have been entertaining and indispensable for debugging.
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    dmagazz

    Posts : 115
    Join date : 2018-06-20
    Age : 50
    Location : new fairf, ct

    Re: .047uf 630v caps? on driver board.

    Post by dmagazz Yesterday at 9:31 pm

    i think everything is chinese nowadays.lol.. jk. but actually, its on the burner for now. a friend of mine, kenneth gucker's dad told me he had on i can have. i may take him up on the offer next time i see him

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