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where to find an assortment of high voltage electroloyic caps for cheap?

Discussion in 'Home Brew' started by towerdog, Feb 27, 2012.

  1. towerdog

    towerdog
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    one-niner-seven

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    where should I look to find an assortment of high voltage electroloyic caps.
    Shipping gets really expensive if I order caps as needed, and it really bites when I find out I missed one.
    Are old boat anchors expensive to bring back into operation?
    Would a motor start or run cap be adequate for a radio, or the caps out an old copier? What else might high voltage caps be used for today or are they pretty much just manufactured to restore old radios?


     

  2. Beetle

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    What's your definition of "high voltage"? Try RF Parts, All Electronics ... or Google.
     
  3. unit_399

    unit_399
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    EL CAPO

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    T-Dog,

    No ... Start/run caps aren't electrolytics.

    -399
     
  4. lmingua

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  5. Beetle

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    Would still like to know what you mean by "high voltage"...200V? 500V? 2KV?
     
  6. liquidh8

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    What he said, I just bought a bunch of HV caps for my Eagle 515, good prices and fast shipping. Thats saying something coming from canada to PA:)
     
  7. High Voltage Mobile NJ

    High Voltage Mobile NJ
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    whats the name of the company you ordered them caps from ? :glare:
     
  8. n8fgb

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  9. Comp

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    ??? As Beetle was asking, the voltage rating you need is what we need to know,.... You can series up capacitors, if you fit 'bleeder/balance' resistors across,... I had some 600Microfarad 600V elecs, and needed 100Mfs at 2Kv for a 4CX250 linear a while ago, I series up four, with bypass/balance resistors to make me 150 Mf at 2400Volts,....
    (I also tend to have my left hand in my pocket, and my wife, {who is an A&E senior nurse!!} nearby, while I work on the linear!!!!!! :redface: )

    The 'bleed' resistors SHOULD drain down any charge on switchoff, but you never know!!! :oops:

    Cheers, have fun, Fred G4ZWI
     
  10. Comp

    Comp
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    G4ZWI

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    Oh, forgot to say, the metal cases WILL have high voltages, respect to earth/chassis, so stand them on a bit of well insulative material, and KEEP THEM WELL AWAY FROM THE CASE!!!! :w00t:

    (Sorry if I am guilty of trying to teach my Granny to suck eggs....:D)

    Cheers, Fred
     
  11. Tallman

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    Bleed off resistors don't always work

    Once you are sure the power is off, a sacrificial screw driver applied between the post of the caps is a good way to discharge them. Then clip alligator leads across them to be sure no residual charge remains. I have seen other people use a light bulb in line of a shorting probe to do the same thing more gently. Just be sure the bulb is good.
     
  12. jeffmassey

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    Where to buy HV Caps

    Hello,

    This may also help: http://www.gatewayelectronlcs.com located in St.Louis.

    BTW,never short-circuit power supply caps--they have a nasty habit of exploding.Photoflash caps are an exception...

    I like the light bulb bleed down trick:I use a bulb with alligator leads as a "soft" fuse when tracking down pinched wiring in the equipment I service.
    Saves on $10.00 fuses...
     
    #12 jeffmassey, Jun 17, 2013
    Last edited: Jun 17, 2013

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