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  1. Replies
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    Yes, connect the replacement ( fixed ) Lpad in...

    Yes, connect the replacement ( fixed ) Lpad in the same arrangement as R2 / R3 .

    The variable LPads are 8 ohm types // so yes, you can use online calculators to get the substitute resistor values....
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    Grounding an Lpad??​ GOOGLE How to Wire an...

    Grounding an Lpad??​ GOOGLE How to Wire an Lpad


    Don't try to combine//meld the functions of the fixed pad ( R2 + R3 in the mid section ) with the function of its variable Lpad.

    Merging...
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    GOOGLE Replace Lpad with fixed resistors...

    GOOGLE Replace Lpad with fixed resistors

    :)
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    That's another misconception of yours that needs...

    That's another misconception of yours that needs to be put to rest >> the schematic is quite clear as to the internal wiring.

    If you follow the wiring layout of the schematics > when you touch...
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    Thanks! You're confusion results from; The...

    Thanks!

    You're confusion results from;

    The whole "Black = Positive" applies only to the drivers ( Legacy ) not the connectors found on the back of speaker boxes .

    :)
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    Amazing, ( the persistence of this Cognitive...

    Amazing, ( the persistence of this Cognitive Disconnect ).

    Once someone has been told that the "+" terminal of a driver is the Black button, why would they persist in treating it like it's the...
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    From Giskards ( 4313B's ) L300, 4333 "BandPass"...

    From Giskards ( 4313B's ) L300, 4333 "BandPass" equivalent thread.

    Here's his equivalent circuit.

    http://www.audioheritage.org/vbulletin/attachment.php?attachmentid=74&stc=1&d=1052963079
    ...
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    I'd truly love to know how both of you ( Paul001...

    I'd truly love to know how both of you ( Paul001 + Riley Casey ) wrongly arrive at your wiring convention conclusions ( given the pdf instructions were previously posted by LHF member "Odd" ) .
    ...
  9. Thread: Urei 803 recone

    by Earl K
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    That center part is called a "Spider" . It's a...

    That center part is called a "Spider" .

    It's a readily available part from any reconer ( who'll sell individual parts ).

    Get the dimensions of it ( overall outside diameter as well as the size...
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    There's no pic here at LHF ( that I know of )...

    There's no pic here at LHF ( that I know of ) that shows how to hardwire the switch ( into the input mode of your choice >> & BTW once you add the necessary 6 wires one is stuck with the choice of...
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    http://www.audioheritage.org/vbulletin/attachment....

    http://www.audioheritage.org/vbulletin/attachment.php?attachmentid=89829&stc=1&d=1635652772

    By far the simplest approach is to bundle the mess off to someone who actually recognizes what they are...
  12. Mazza, I would simply follow GordonW's lead...

    Mazza,

    I would simply follow GordonW's lead and use 30 minute, 2-part Epoxy for that magnet repair.

    GordonW over at AudioKArma

    I'm thinking that you might also want to put a thin coating of...
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    Some regulars might not even see this thread >...

    Some regulars might not even see this thread > since it's so misplaced and visually buried down in the roll-call .

    Normally when one owns the actual part needing a spec ( like the 2.6mH coil in...
  14. Mazza, My embryonic thoughts on how to fix //...

    Mazza,

    My embryonic thoughts on how to fix // re-center a woofers top-plate are found within This Thread!

    The bare essentials are that one needs to look to the automotive industry for help // ...
  15. Hi Mazza, It seems to me that you've stated...

    Hi Mazza,

    It seems to me that you've stated that this frankensteen setup is free to you as long as you pay full retail for a recone at the reconers shop.

    I'd say pass.

    There are multiple...
  16. 136HS...

    136HS I believe.

    :)
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    Tough network to copy due to the tapped coil. ...

    Tough network to copy due to the tapped coil.

    Here it is though.

    :)
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    You're welcome. Definitely worth the gamble at...

    You're welcome.

    Definitely worth the gamble at that price.

    :)
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    JBL 4892...

    JBL 4892

    All great parts in those boxes if the neodymium magnets haven't started to rust and breakdown ( reducing range and output ).

    FYI, it's impossible to determine the conditions ( of the...
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    @Ian, That's interesting. Who's words are...

    @Ian,

    That's interesting.

    Who's words are you quoting ?

    So the 435Al doesn't have an aquaplased diaphragm ? I assumed it did.

    Oldbrowndog ought to remove his non-working one to confirm...
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    I just measured an older spare-part ( short-coil...

    I just measured an older spare-part ( short-coil assembly ) that I have here.

    The Voice-Coil ( diameter ) is approx. 4 1/8" . That's center/top of metal former to center of former .

    Adding in...
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    A little bit more info; Read thread Cleaning...

    A little bit more info;

    Read thread Cleaning Aluminum Frames

    I haven't tried this phosphoric acid approach ( though it makes perfect sense ) .

    Below is one members result ( flodstroem ) ...
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    Ya know mortron you're getting way ahead of...

    Ya know mortron you're getting way ahead of yourself when you start talking about passive component values and their suppliers.


    The values you see ( within my postings ) are not written in...
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    Sorry oldbrowndog :( . I'm not 100% sure of...

    Sorry oldbrowndog :( .

    I'm not 100% sure of anything ( regarding the "Plug-And-Play" substitution of 2431h drivers for your 435Al ).

    It's really all just best guess since I don't own any...
  25. Ahhh, Okay! Perfect! Compression driver...

    Ahhh, Okay!



    Perfect! Compression driver rebuilding really ought to be childs-play for you once you understand the steps.

    You might need to build a magnet charger if you can't access...
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