BA-F1 restore

Discussion in 'Exclusively Sansui' started by Hyperion, Dec 1, 2017.

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  1. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    Digikey. ;)
     
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  2. Overundr1

    Overundr1 AK Subscriber Subscriber

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    Amazing :bowdown:
    Thinking this would work for the 919 as well.
    What detail.
     
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  3. ghamilton

    ghamilton Super Member

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    I know it's not new. It just seems to be explained and done in such a way to be practical for most people. Maybe someone that wouldn't consider this before, will now.
     
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  4. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    Ah ok - understood :thumbsup:
     
  5. Overundr1

    Overundr1 AK Subscriber Subscriber

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    Will also be interesting to see how those outputs perform and if you will need to add any small value caps to the feedback circuit to prevent overshoot during square wave testing later on.

    :lurk:
     
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  6. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    Yep, I did some signal generator testing of the set of original OP transistors before I removed them, I have a good idea of the square wave output at various frequencies. All was nicely damped, nice and square with no overshoot - I took the trouble as I thought this would be important to know. :)
     
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  7. smurfer77

    smurfer77 Super Member

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    Got to agree with that; the detailed instructions make this much more approachable for many of us.
     
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  8. Karl vd Berg

    Karl vd Berg Super Member

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    Yes, and the approach reaches other models/brands, too, including KA-907's 2SA165 / 2SC2489 (50MHz), L-07MII's 2SC2337/2SA1007 (70MHz), etc...
     
  9. pete_mac

    pete_mac Super Member

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    Thanks for your efforts in documenting and explaining the process John!!
     
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  10. _mano

    _mano Active Member

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    Great thanks
     
  11. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    Well, bench testing complete, listening to it now for the first time, being driven by my C-2102 pre-amp (- fully reconditioned) - it's beautiful, plenty of bass with a very nicely presented image. Female vocals are very nice, and rock music makes you feel like turning it up!

    Just a soak test and final set up to do - then cosmetics such as speaker terminals, remove and clean the front panel etc.
     
    Last edited: Jan 16, 2018 at 2:58 PM
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  12. ManyMoonsAudio

    ManyMoonsAudio AKA paul79 Sponsor Subscriber

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    Nice. Look forward to your extended eval and your results regarding the bench testing.
     
    Last edited: Jan 16, 2018 at 8:07 PM
  13. smurfer77

    smurfer77 Super Member

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    Great thread! I've been following all the way along. Can you comment on sound and build of BA-F1 vs AU-X1/11 ?
     
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  14. Hyperion

    Hyperion Roobarb & Custard Subscriber

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    Yes, the BA-F1 is similar to the AU-X1 - but less refined although it does extract a fair amount of detail. The rock music presentation of the BA-F1 reminds me a bit of the AU-717. I should think the BA-F1 would sound significantly different depending on what pre-amp it is paired with.

    But I may just be telling you what my C-2102 sounds like paired with the BA-F1. :confused:

    I could do with trying some more rock music, and some classical. :music:
     
    Last edited: Jan 17, 2018 at 1:07 PM
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  15. smurfer77

    smurfer77 Super Member

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    I guess the ultimate comparison would be to have the BA-F1 paired with the CA-F1.
     
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