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The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


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stewdan
Bob Latino
peterh
scott6058
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    PAS 2 / PAS 3 Identity

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    scott6058


    Posts : 37
    Join date : 2009-01-21

    PAS 2 / PAS 3 Identity Empty PAS 2 / PAS 3 Identity

    Post by scott6058 Fri Jun 12, 2015 11:17 am

    May sound silly or could be obvious but how do you tell the difference between the later silver faced PAS units.

    I have one F/S on Epay and may have listed it wrong Sad

    http://www.ebay.com/itm/141687481055?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

    Also what is a Scott LM-35 multiplexer and why do some people want them?

    Thanks for any help.

    Kind regards

    Scott


    Last edited by scott6058 on Fri Jun 12, 2015 11:18 am; edited 1 time in total (Reason for editing : typo)
    peterh
    peterh


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    Join date : 2012-12-25
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    PAS 2 / PAS 3 Identity Empty Re: PAS 2 / PAS 3 Identity

    Post by peterh Fri Jun 12, 2015 11:38 am

    scott6058 wrote:May sound silly or could be obvious but how do you tell the difference between the later silver faced PAS units.

    I have one F/S on Epay and may have listed it wrong Sad

    http://www.ebay.com/itm/141687481055?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649

    Also what is a Scott LM-35 multiplexer and why do some people want them?

    Thanks for any help.

    Kind regards

    Scott
    This is a PAS-3
    It might be a PAS-3X but it is not visible from the photos.
    price is right
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    scott6058


    Posts : 37
    Join date : 2009-01-21

    PAS 2 / PAS 3 Identity Empty Re: PAS 2 / PAS 3 Identity

    Post by scott6058 Fri Jun 12, 2015 11:52 am

    Thanks Peter

    Any clue on how to identify a 3X.

    On the back it says only PAS.

    Again thanks for the help.

    Scott
    Bob Latino
    Bob Latino
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    PAS 2 / PAS 3 Identity Empty Re: PAS 2 / PAS 3 Identity

    Post by Bob Latino Fri Jun 12, 2015 1:34 pm

    The PAS-3X has a flat spot near the center of the bass and treble knob's rotation. If you turn both the bass and treble knobs slowly all the way from one end to the other, you can usually feel that "null" position. If the bass and treble knobs have the same feel all the way through their rotation then you have a PAS-3.

    Bob
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    stewdan


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    Join date : 2010-03-07
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    PAS 2 / PAS 3 Identity Empty Re: PAS 2 / PAS 3 Identity

    Post by stewdan Fri Jun 12, 2015 3:18 pm

    Scott -- the LM-35 is a FM Multiplex unit that is used to convert a Mono FM Tuner to FM Stereo unit. Originally intended for Scott Mono Tuners, but can used on other Mono Tuners (brands).
    Stew
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    GP49


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    PAS 2 / PAS 3 Identity Empty Re: PAS 2 / PAS 3 Identity

    Post by GP49 Fri Jun 12, 2015 6:21 pm

    Bob Latino wrote:The PAS-3X has a flat spot near the center of the bass and treble knob's rotation. If you turn both the bass and treble knobs slowly all the way from one end to the other, you can usually feel that "null" position. If the bass and treble knobs have the same feel all the way through their rotation then you have a PAS-3.

    Bob

    Another way to tell: The PAS-3's tone control knobs will rotate through the same size arc as the balance control.

    The PAS-3x tone control knobs have a visibly lesser arc of rotation.

    j beede
    j beede


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    Location : California

    PAS 2 / PAS 3 Identity Empty Re: PAS 2 / PAS 3 Identity

    Post by j beede Fri Jun 12, 2015 11:46 pm

    Another indicator: If you hear a thump or pop through your speakers when you rotate the bass or treble controls off the 12 o'clock position--you have a PAS-3X
    audioregenesis
    audioregenesis


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    Location : Canada

    PAS 2 / PAS 3 Identity Empty Re: PAS 2 / PAS 3 Identity

    Post by audioregenesis Thu Jun 18, 2015 1:37 pm

    The PAS 3X tone controls do NOT have a mechanical detent at center. There are a few external clues, however, along with obvious internal differences. Here's an article that describes how to tell if it's a PAS 3 or 3X:

    http://audioregenesis.com/documents/Dynaco%20PAS%203%20or%203X.pdf

    As far as "originally" being a PAS 2 or PAS 3/3X - The PAS 2 is usually typified by the brass faceplate, however Dynaco did supply upgrades kits for both the faceplate, and later, 3X tone controls, so any particular PAS, of unknown background, may have started life as a PAS 2, or 3, and been upgraded at some point.
    Tiziano73
    Tiziano73


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    Join date : 2012-09-11
    Location : Italy

    PAS 2 / PAS 3 Identity Empty Re: PAS 2 / PAS 3 Identity

    Post by Tiziano73 Tue Jun 23, 2015 6:08 am

    audioregenesis wrote:The PAS 3X tone controls do NOT have a mechanical detent at center. There are a few external clues, however, along with obvious internal differences. Here's an article that describes how to tell if it's a PAS 3 or 3X:

    http://audioregenesis.com/documents/Dynaco%20PAS%203%20or%203X.pdf

    As far as "originally" being a PAS 2 or PAS 3/3X - The PAS 2 is usually typified by the brass faceplate, however Dynaco did supply upgrades kits for both the faceplate, and later, 3X tone controls, so any particular PAS, of unknown background, may have started life as a PAS 2, or 3, and been upgraded at some point.

    Very nice Article.

    With compliments.

    Tiziano

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