AIWA Alpha-2 mechanism & grooved head

Discussion in 'Tech talk' started by Valentin, Jun 30, 2024.

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  1. Valentin

    Valentin Well-Known Member

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    Created this thread as I need some help in creating a list with all AIWA walkmans using the Alpha-2 mechanism.

    https://stereo2go.com/forums/threads/troubleshooting-an-aiwa-alpha-2-mechanism.9398/

    Some of these walkmans include:

    1. Alpha-2 mechanism
    HS-PX30/303, HS-PX50/505, HS-PX900
    HS-PL30/303, HS-PL50/505, HS-PL55/555, HS-PL70/707
    HS-P50/P505 (mk I)
    HS-F50/F505
    HS-JX30/JX303/TX303, HS-JX2000
    HS-RL50, HS-RL70
    HS-JL50/505, HS-JL30/JL303
    HS-RX30, HS-RX50, HS-RX705
    HS-WR70, Kenwood CP-R750

    All the Alpha-2 mechanism walkmans share the grooved head with improved deep bass response.

    2. 0ZM-4 mechanism
    HS-PX610, HS-PX710, HS-PX727, HS-PX910
    HS-JX828, HS-JX929
    HS-PL77/PL777
    HS-RX727
    HS-P75/P705

    3. 0ZM-1 mechanism
    HS-RX610, HS-RX618, HS-RX-628, HS-RX626, HS-RX703

    4. Alpha-1 mechanism
    HS-J50

    5. Z-1 mechanism
    HS-PX20
     
    Last edited: Feb 24, 2026
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  2. JUAN ANDRES MONTIEL DIEZ

    JUAN ANDRES MONTIEL DIEZ Active Member

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    Hi Valentin,

    HS-PL50/505; HS-F505
    , HS-JL303.

    I 'm not sure! that HS-PL55 got this Alpha 2 mech
     
    Last edited: Jul 3, 2024
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  3. Valentin

    Valentin Well-Known Member

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    Thanks for the info !

    HS-PL55/555 has the Alpha-2 mech, there are pictures with it on the linked thread.
    Edited the first post adding all these walkmans.
     
  4. Shaman32

    Shaman32 Member

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    Greetings,, would like to add, Aiwa, HS-WR70, A wireless headphones player, and the Aiwa HS-RX705 Kenwood CP-R750 Radio recorder also has the
    Alpha-2 mechanism.
     
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  5. Silver965

    Silver965 Well-Known Member

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    Aiwa hs tx303 - Aiwa hs Jx303 They are the same model but one records and the other doesn't
     
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  6. Black Fingers

    Black Fingers Active Member

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    Have an Aiwa HS-RX628 on the bench and this also has the grooved (HX?) head although this is not mentioned anywhere on the walkman itself nor on the original box.
     
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  7. Valentin

    Valentin Well-Known Member

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    Added this and the RX626 to the list, thanks for sharing !

    HX head isn't always mentioned, likely because this head existed both in permalloy and amorphous versions.

    Can't find the RX628 online, can you add some pictures with it for reference ?
    Found an RX626 on walkman.land: https://walkman.land/aiwa/hs-rx626, which is likely similar to the 628. This has the 0ZM-1 mechanism.
     
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  8. Black Fingers

    Black Fingers Active Member

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    Well it is the big brother of the RX610 i guess, already posted a comment there :)
    Main board of these is also used in the PX310/510...have a bunch of them on the bench as we speak....horrible cap leakage.
    https://walkman.land/aiwa/hs-rx610
     
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  9. Black Fingers

    Black Fingers Active Member

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    HS-RL70 can be added to the list, also grooved head, probably the permalloy version.
     
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