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Thread: Bridged Phase Linear series ll

  1. #11
    Forum Veteran grapplesaw's Avatar
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    Cool

    Bias transistors to be added along with a little tidying up and the main section will be done. Front panel left and may have something up
    my sleeve there.

    Well that is it for the next 10 days or so.
    More to come stay tuned
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    Last edited by grapplesaw; 09-30-2017 at 06:18 PM.
    try the Lightening Bolt WOPL 1000 for a hair lifting experience today

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  2. #12
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    Halfbiass...Electron Herder and Backass Woof
    Why 2 thermoswitches?
    taking something that's already good, and making it better...........and for the knowing smiles that cross their faces.......Nando-2011...

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  3. #13
    Forum Veteran grapplesaw's Avatar
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    Quote Originally Posted by laatsch55 View Post
    Why 2 thermoswitches?
    One for high heat shut down and the other One operates the plug for the fan. Closes at 30íC to turn on the fan. I have always wanted to put this in the 700ís but never got around to it.
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    Last edited by grapplesaw; 09-30-2017 at 06:34 PM.
    try the Lightening Bolt WOPL 1000 for a hair lifting experience today

    Warning !!! Use only when you want to blown the town down

    proud father of the only WOPL Fully Comp dual 500

  4. #14
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    Halfbiass...Electron Herder and Backass Woof
    Ah.....slick....
    taking something that's already good, and making it better...........and for the knowing smiles that cross their faces.......Nando-2011...

    "Silence cannot be Misquoted"--Lazarus Short-2012 "

    " I Just Collect Smiles Craig......Cheap Smiles!-----Fishoz-2017

    "anything can be done, it's finding the easiest way that's hard"-----Bobbysdad--2014

    " Synth percussion is deadly to children, house pets and shitty power supplies"---Stephen Evans 2014

    " You have not reached the point of diminishing returns, you've just ran out of money

    " The Pioneer U-24, unfortunately, is just too expensive and rare to find. That's why I have one."--Nando-2014

  5. #15
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    Quote Originally Posted by grapplesaw View Post
    There is much debate as it being a good idea to build this configuration or not. Foreseen problems of high heat and reduced sound quality are to be concerned about.
    Solid state amps have been built with bridging options for a long time. There are different ways to bridge an amp, and depending on the method used, DC offset may be affected. Distortion will usually rise slightly because you are driving a lower load as seen by the amp. With the configuration you are using Glen, DC offset will not be an issue.

    If you plan on driving the 400 hard, you may need a fan to help keep the heat sink cool. The 400 bridged should put out over 700 Watts RMS (>0.25% THD+N, if I remember correctly) into an 8 Ohm load.

    Quote Originally Posted by grapplesaw View Post
    Other issue are the actual rail voltage vs that seen by the drivers.
    Not sure I follow you here. Please clarify.

  6. #16
    Forum Veteran grapplesaw's Avatar
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    Quote Originally Posted by THD+N View Post
    Solid state amps have been built with bridging options for a long time. There are different ways to bridge an amp, and depending on the method used, DC offset may be affected. Distortion will usually rise slightly because you are driving a lower load as seen by the amp. With the configuration you are using Glen, DC offset will not be an issue.

    If you plan on driving the 400 hard, you may need a fan to help keep the heat sink cool. The 400 bridged should put out over 700 Watts RMS (>0.25% THD+N, if I remember correctly) into an 8 Ohm load.


    Not sure I follow you here. Please clarify.
    I have returned to this project and have measured output. So with same input level we now have double voltage out. This is because two channels have joined together.
    THD+N is about double as non bridged at equal voltage output but the bridge set up can put out double The voltage.

    I plan on using this for a bass driver and at lower Hz the THD+N dramatically lower
    so we have a winner. A little heavy testing will confirm.
    try the Lightening Bolt WOPL 1000 for a hair lifting experience today

    Warning !!! Use only when you want to blown the town down

    proud father of the only WOPL Fully Comp dual 500

  7. #17
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    Halfbiass...Electron Herder and Backass Woof
    sO WHAT WAS THE MAX OUT??
    taking something that's already good, and making it better...........and for the knowing smiles that cross their faces.......Nando-2011...

    "Silence cannot be Misquoted"--Lazarus Short-2012 "

    " I Just Collect Smiles Craig......Cheap Smiles!-----Fishoz-2017

    "anything can be done, it's finding the easiest way that's hard"-----Bobbysdad--2014

    " Synth percussion is deadly to children, house pets and shitty power supplies"---Stephen Evans 2014

    " You have not reached the point of diminishing returns, you've just ran out of money

    " The Pioneer U-24, unfortunately, is just too expensive and rare to find. That's why I have one."--Nando-2014

  8. #18
    Forum Veteran Northwinds's Avatar
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    Fondler errrr... fan of all Nav's avatars
    I am a bit confused, Lee told me 400 and 700s could not be bridged BUT you could just use one channel a get a little bit more power??
    "I really can't begin to describe what happens at that frequency when you hit that SPL, but it's serious. We saw a mouse stagger out of a crack in the concrete floor and die"
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  9. #19
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    Halfbiass...Electron Herder and Backass Woof
    nO, i SAID THEY COULD BE BRIDGED BUT IT WOULD BE A BAD IDEA.. damn caps lock....Ya can't drive a 4 ohm load, distortion rises, BUT, with Glen doing this we will know for sure...
    taking something that's already good, and making it better...........and for the knowing smiles that cross their faces.......Nando-2011...

    "Silence cannot be Misquoted"--Lazarus Short-2012 "

    " I Just Collect Smiles Craig......Cheap Smiles!-----Fishoz-2017

    "anything can be done, it's finding the easiest way that's hard"-----Bobbysdad--2014

    " Synth percussion is deadly to children, house pets and shitty power supplies"---Stephen Evans 2014

    " You have not reached the point of diminishing returns, you've just ran out of money

    " The Pioneer U-24, unfortunately, is just too expensive and rare to find. That's why I have one."--Nando-2014

  10. #20
    Forum Veteran grapplesaw's Avatar
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    Quote Originally Posted by laatsch55 View Post
    sO WHAT WAS THE MAX OUT??
    will let you know when I finish off this liquid cool Load resistor set up
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    Last edited by grapplesaw; 02-12-2018 at 04:58 PM.
    try the Lightening Bolt WOPL 1000 for a hair lifting experience today

    Warning !!! Use only when you want to blown the town down

    proud father of the only WOPL Fully Comp dual 500

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