Dave Slagle Monoblock Transformer Volume Control Build

Discussion in 'DIY' started by SET12, Feb 7, 2016.

  1. mkane

    mkane AK Subscriber Subscriber

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    exact is .249"
     
  2. Tillerman

    Tillerman Active Member

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    Dan,
    Can you share the part number and source for your ABS boxes?
     
  3. SET12

    SET12 Super Member

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    Here they are $9.70 each. http://www.digikey.com/product-search/en?keywords=377-1218

    BTW I had the same trouble with my knobs and I spent $80 on them, luckily I had another set that worked out better because they have a nice white line that's easy to see.

    SET12
     
  4. rogerfederer

    rogerfederer AK Subscriber Subscriber

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    So it sounds like they are not standard 6mm shafts. Where did you find knobs that worked? I'm reluctant to file down the shafts.
     
  5. SET12

    SET12 Super Member

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    1,841
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    I got them from Welbourne Labs 25 yrs ago.

    I was thinking of taking my knobs to a metal shop and having them drill the knobs out, it wouldn't be a lot of metal, but accuracy is needed.
     
  6. mkane

    mkane AK Subscriber Subscriber

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    5,525
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    103 miles N. of S.F.
    .249 mm is real close to 1/4" no.
     
  7. SET12

    SET12 Super Member

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    1/4 in. is equal to 6.35 mm is what I found on a conversion site.
     
  8. mkane

    mkane AK Subscriber Subscriber

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    my dial caliper confirms this.
     
  9. rogerfederer

    rogerfederer AK Subscriber Subscriber

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    well that is helpful. i'm seeing a bunch of knobs for 1/4" shafts on the bay and looks like PE has them too. thanks!
     
  10. mkane

    mkane AK Subscriber Subscriber

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  11. Tillerman

    Tillerman Active Member

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    You would think that Dave Slagle would pick a shaft size for his modules that customers can find knobs for or else provide knobs himself, if they are a unique size.
     
  12. rogerfederer

    rogerfederer AK Subscriber Subscriber

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  13. rogerfederer

    rogerfederer AK Subscriber Subscriber

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  14. rogerfederer

    rogerfederer AK Subscriber Subscriber

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    email back from dave; says the data sheet shows shaft = 6.35mm, which is same as 1/4"
     
  15. Tillerman

    Tillerman Active Member

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    Thanks for the update. I think this thread is going to become a reference for current and future builders. All the links are great to have.
     
  16. Binkman

    Binkman Addicted Member

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    morph to knobs.. :D been following thread a bit.

    We had a member with a big thread on 3d printing... can't see why it wouldn't work. I have a sta-2300 with aluminum and small bands of rubber to give you grip. well thought of could be dipped, too. There are inserts that could be made but what the heck.. not a perfect fit on shaft? well improvise!

    bink
     
  17. SET12

    SET12 Super Member

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  18. mkane

    mkane AK Subscriber Subscriber

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    At the moment our TVC's are inline with the Bottlehead 2a3. Sublime. Still shaking my head and someone said passive have no dynamics.:whip:
     
  19. mkane

    mkane AK Subscriber Subscriber

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    5,525
    Location:
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    Enclosure finished. Still need some knobs.

    [​IMG]
     
    Last edited: Apr 16, 2016
  20. rogerfederer

    rogerfederer AK Subscriber Subscriber

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    that looks nice! i just finished mine too: http://albums.phanfare.com/isolated/1xGL8309/1/7200082

    so far it is very detailed and balanced. i have to do a shoot-out with the LDR, but i think the TVC has an edge re detail. i did find that it was not able to fully attenuate one of my sources, a tuner. luckily the tuner has output pots so i can reduce its output. however, i'd rather take those pots out of the equation, so the lack of full attenuation is a downside of the TVC.

    is there any burn-in period with the TVC?
     

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