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Thread: Altec Valencia / Heathkit AS101 Lpads

  1. #1
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    Altec Valencia / Heathkit AS101 Lpads

    Hello, I have a pair of Heathkit AS101 speakers, which have the same components as the Altec Valencia. Crossovers are different and are not in a sealed, tar-filled box. I'm rebuilding the crossovers, and there is a tandem pair of Lpads, one 8 ohm, and one 40 ohm, stacked and coupled so they turn together. The windings are ruined, so I need to replace the Lpads. Parts Express has no ability to cross-reference them, so I'm at a bit of a loss. There is a thread here in which Zilch says that a single 16 ohm Lpad can be used.

    Athough I've followed this site for years, this is my first post. Thanks for any advice.

  2. #2
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    - I suspect you're getting confused by seeing 2 ( stacked ) devices ( & then assuming that's the quantity you need to replace ) .
    Not so !

    - You only need to buy a single ( modern style ) 8 ohm variable Lpad ( to satisfy the network requirements ).

    - Your ( ancient ) pair of stacked potentiometers are simply ( when used together the functional equivalent of ) 1 modern style variable Lpad ( as seen in this example . )

    - Here's a previous thread for some ( network ) reference .

    -Help with Heathkit AS101







  3. #3
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    Thank you! So the stack was basically the equivalent of the item to which you refer?

    I do see that both of the existing potentiometers are shorted to each other at one terminal each. The speakers are 8 ohms. I will order them when I order the new capacitors.
    Last edited by iconicmn; 04-09-2015 at 02:25 PM. Reason: add comment

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