Closed Thread
Results 1 to 11 of 11

Reload Thread: Stiffening capacitors in a wall outlet

  1. #1
    Raven's Avatar
    Raven is offline Lacking social skills!



    Join Date
    Dec 2004
    Location
    Michigan
    Age
    29
    Posts
    4,618
    Post Thanks / Like
    Images
    1
    Mentioned
    0 Post(s)

    Stiffening capacitors in a wall outlet

    Just a random thought, but if I were to wire two ~700uF stiffening caps in series between a piece of equipment and the wall socket it is plugged into (One on + line, on one - line), what kind of effect would it have?







  2. #2
    thylantyr's Avatar
    thylantyr is offline CarAudio.com Elite



    Join Date
    Apr 2005
    Location
    [Yoda] Belong to us all your base are...
    Posts
    1,395
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Stiffening capacitors in a wall outlet

    120VAC -> 700uF capacitor -> load

    According to this calculator;
    http://www.kusashi.com/reactance-c.php

    60hz is the AC wall socket frequency.
    700uF is your capacitor

    Capacitive Reactance [Xc] = 3.78 Ohms

    Equivalent to placing a 3.78 ohm resistor in series with the AC line.

    If this is wrong let me know

    Two 740uF in series would net 370uF and Xc = 7.1 Ohms

    If placed across the AC, seems like a 17A draw? /hehe




  3. #3
    Alpineinstaller's Avatar
    Alpineinstaller is offline <3 teh JnTar



    Join Date
    Jun 2005
    Location
    home
    Age
    27
    Posts
    3,296
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Stiffening capacitors in a wall outlet

    fun times




    XM-Alpine Adapter/Receiver For Sale - 750GB Ext. HDD For Sale

    Offical Rep for Squeakco Inc.
    Quote Originally Posted by squeak9798
    There's a new sub out called the Squeakinator. 125mm Xmax. 25" cone. Able to kill small animals and annoying children. Plays flat to 1hz in-car.
    $1,025 shipped to your door
    .
    Quote Originally Posted by squeak9798
    I think he should also consider the new Squeaksters.
    Nobody's heard them. They aren't in production yet. There is no prototype even available. But he should still consider them. They will rock. I promise.
    PS: The new Squeaksters will be a midwoofer addition to my subwoofer line, the Squeakinators

  4. #4
    Raven's Avatar
    Raven is offline Lacking social skills!

    Threadstarter


    Join Date
    Dec 2004
    Location
    Michigan
    Age
    29
    Posts
    4,618
    Post Thanks / Like
    Images
    1
    Mentioned
    0 Post(s)

    Re: Stiffening capacitors in a wall outlet

    That would be wiring the cap directly to the outlet. I'm planning on running it between the wall and a tube amp that doesn't draw anywhere near 17 amps.




  5. #5
    thylantyr's Avatar
    thylantyr is offline CarAudio.com Elite



    Join Date
    Apr 2005
    Location
    [Yoda] Belong to us all your base are...
    Posts
    1,395
    Post Thanks / Like
    Mentioned
    0 Post(s)

    Re: Stiffening capacitors in a wall outlet

    Quote Originally Posted by Raven
    That would be wiring the cap directly to the outlet. I'm planning on running it between the wall and a tube amp that doesn't draw anywhere near 17 amps.
    It won't be a 'stiffening capacitor' in that application It's a 'waste of time capacitor'.

    Also, capacitors have polarity, some don't. Placing polarized capacitors in AC can be bad news.

    If you want stiffening capacitors you need to examine the tube amplifier power supply.

    You don't think 120VAC x 20A for a typical house circuit is a 'stiff' 2400VA power source for a little tube amp ?




  6. #6
    JimJ's Avatar
    JimJ is offline Tangled Up in Blue



    Join Date
    Jun 2004
    Location
    Hillsborough, NC
    Posts
    31,680
    Post Thanks / Like
    Mentioned
    1 Post(s)

    Re: Stiffening capacitors in a wall outlet

    Yeah, I'm not exactly sure what the point of this exercise is...




  7. #7
    Raven's Avatar
    Raven is offline Lacking social skills!

    Threadstarter


    Join Date
    Dec 2004
    Location
    Michigan
    Age
    29
    Posts
    4,618
    Post Thanks / Like
    Images
    1
    Mentioned
    0 Post(s)

    Re: Stiffening capacitors in a wall outlet

    I am looking for an inexpensive way of conditioning the power from a standard 110 outlet to combat brownouts and spikes.




  8. #8
    JimJ's Avatar
    JimJ is offline Tangled Up in Blue



    Join Date
    Jun 2004
    Location
    Hillsborough, NC
    Posts
    31,680
    Post Thanks / Like
    Mentioned
    1 Post(s)

    Re: Stiffening capacitors in a wall outlet

    Sounds like the power tranny and/or buffer cap aren't doing their job if you're getting lots of inducted noise...




  9. #9
    Raven's Avatar
    Raven is offline Lacking social skills!

    Threadstarter


    Join Date
    Dec 2004
    Location
    Michigan
    Age
    29
    Posts
    4,618
    Post Thanks / Like
    Images
    1
    Mentioned
    0 Post(s)

    Re: Stiffening capacitors in a wall outlet

    If by "Power Tranny" you mean the giant transformer that changes the 110AC input to whatever voltage the rectifier takes in, it's very feasable.

    If by "Buffer Cap" you mean the giant stiffening capacitors that this thing seems to have one or two too many of, they've already been replaced. Sprague Atoms in their place via tubesandmore.com. =)




  10. #10
    JimJ's Avatar
    JimJ is offline Tangled Up in Blue



    Join Date
    Jun 2004
    Location
    Hillsborough, NC
    Posts
    31,680
    Post Thanks / Like
    Mentioned
    1 Post(s)

    Re: Stiffening capacitors in a wall outlet

    You have a EL84 single ended pentode amp, right? Post a picture of it, I have basically the same amp I'm restoring as well...




  11. #11
    Raven's Avatar
    Raven is offline Lacking social skills!

    Threadstarter


    Join Date
    Dec 2004
    Location
    Michigan
    Age
    29
    Posts
    4,618
    Post Thanks / Like
    Images
    1
    Mentioned
    0 Post(s)

    Re: Stiffening capacitors in a wall outlet

    Pics are easier said than done when you don't have a camera. =(




Closed Thread

Similar Threads

  1. Powering system in house using the wall outlet
    By Basshead808 in forum Home Audio/Video
    Replies: 25
    Last Post: 10-02-2005, 07:45 PM
  2. hooking XXX up to wall outlet
    By Alphafrog1 in forum Subwoofers
    Replies: 7
    Last Post: 08-29-2003, 01:01 AM
  3. Plugging a sub into a wall outlet?
    By Justinh722 in forum Subwoofers
    Replies: 9
    Last Post: 04-04-2003, 02:54 PM
  4. Plugging a subwoofer into a wall outlet....
    By cadenceman in forum Wiring, Electrical and Installation Help
    Replies: 21
    Last Post: 01-19-2003, 12:55 AM
  5. wall outlet
    By crakerhead in forum Subwoofers
    Replies: 24
    Last Post: 01-08-2003, 12:41 AM

Posting Permissions

  • You may not post new threads
  • You may post replies
  • You may post attachments
  • You may edit your posts

1e2 Forum