Posted by Doc B. (M) on September 08, 2009 at 17:45:31

I have added the Quickie battery powered tube preamp to the shopping cart. The description will flesh out a bit as I find time.

• Quickie   (Open in New Window)

Edits: 09/08/09   09/08/09   09/08/09

• Tube Life - Natural Sound 12:47:02 09/10/09 (0)
  In Reply to: RE: Quickie now on shopping cart posted by Doc B. on September 08, 2009 at 17:45:31

  Is it safe to assume that tube life will be pretty high?
  

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• Jumped in - Booangler 06:41:49 09/09/09 (10)
  In Reply to: RE: Quickie now on shopping cart posted by Doc B. on September 08, 2009 at 17:45:31

  Hi Doc,
  
  Been trying to find time to order one of these for the last few weeks but with no success. Today you made it much easier and I took the plunge. I am very thrilled at being the newest member of the Bottlehead family.
  
  Regards,
  
  Alan
  

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  • RE: Jumped in - Doc B. 07:39:22 09/09/09 (9)
    In Reply to: RE: Jumped in posted by Booangler on September 09, 2009 at 06:41:49

    Thanks Alan! I think that when folks start playing with these they are going to find that really fun part of DIY coming back to them, where you just try stuff without the angst of it being audiophile approved.
    
    PB immediately whipped one into a headphone amp for high impedance headphones by adding a couple of stock S.E.X. kit transformers and a headphone jack. I can imagine stuffing the parts into a PVC tube that's just the right size to fit a water bottle holder and carrying it in a fanny pack with an iPod. I think a solar powered version would be very cool too, and PJ has been dreaming about a complementary battery powered phono stage.
    Of course with batteries it's super quiet, and there is definitely some of the high resolution flavor present that I have heard from exotic DHT preamps.
    

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    • RE: Jumped in - q 14:02:22 09/10/09 (0)
      In Reply to: RE: Jumped in posted by Doc B. on September 09, 2009 at 07:39:22

      Just ordered two. Thx for making this available. Had to explain to the wife why I was requesting a Quickie from someone from the Nor-west. It will be interesting to describe my system to others. I plan to dedicate one of these to my Charlize 2 mnblks(slaPS)...I've got a Quickie with two Charlize's...whoo hoo
      Anyway,
      Have a question about the plate. Can I build a mounting plate out of wood? do I need to laminate copper or something?
      I'm an avid woodworker with a full shop, so I'm partial to making things look cool with various woods.
      Oh Still working On my Foreplay3 (yet another suggestive remark)
      thx
      q
      Laptop Foobar USB Monica
      6CL6 Spuds
      Mnblk Charlizes SLA PS
      OB B200's
      Silver Iris's Auggie's
      Corner Horns soon!
      
      

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    • RE: Jumped in - royewest 21:54:06 09/09/09 (6)
      In Reply to: RE: Jumped in posted by Doc B. on September 09, 2009 at 07:39:22

      Doc,
      
      I'm very tempted to order a Quickie and use the transformers left over when I upgraded my S.E.X. amp to create a Pre / headphone amp -- will you post details of this surgery?
      
      Thanks,
      
      __Roy
      

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      • RE: Jumped in - Doc B. 08:29:25 09/10/09 (5)
        In Reply to: RE: Jumped in posted by royewest on September 09, 2009 at 21:54:06

        Yes, we certainly will post instructions. I'll try to get to that in the next few days.
        

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        • RE: Jumped in - artsybrute 17:53:50 09/10/09 (4)
          In Reply to: RE: Jumped in posted by Doc B. on September 10, 2009 at 08:29:25

          What is the current draw?
          
          The reason I ask is because early on, PJ figured I might be able to use my original Paramour transformers or the transformer upgrade without parafeed. I think back then we were talking about 3 ma.
          
          Is that still the case? If not, could you give us a ballpark cap size for use with the original Paramour upgrade trannies?
          
          Pretty please?
          
          With all the convoluted projects I'm into, I'm really looking forward to receiving my Quickie for a dose of instant gratification. Thanks for offering it.
          
          
          
          
          
          Triamp... Take a load off!
          
          

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          • RE: Jumped in - Paul Joppa 18:48:31 09/10/09 (3)
            In Reply to: RE: Jumped in posted by artsybrute on September 10, 2009 at 17:53:50

            Current draw is 2mADC stock (36 volt B battery). With a transformer or choke in the plate instead of the 4K resistor, it might go as high as 3mA.
            

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            • RE: Jumped in - artsybrute 07:08:34 09/11/09 (2)
              In Reply to: RE: Jumped in posted by Paul Joppa on September 10, 2009 at 18:48:31

              Thanks Paul,
              
              If I try the upgrade transformers without a parafeed cap, is there a way to tell if I'm hurting the OPT's?
              
              Better yet, is there a simple way for me to test if these trannies can handle a few millies of current, maybe the way you tested the OPT's in the link below?
              
              
              
              Triamp... Take a load off!
              

              • Using Paramour/SEX OPT's in Quickie   (Open in New Window)

              
              

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              • RE: Jumped in - Paul Joppa 11:24:54 09/11/09 (1)
                In Reply to: RE: Jumped in posted by artsybrute on September 11, 2009 at 07:08:34

                OK, I just scrounged up an original-Foreplay upgrade OPT and checked it. Looks like 2mA is OK but 3mA is pushing it.
                
                In both cases (this and the Speco) the exact current before saturation depends on the tightness with which the laminations are stacked. This can be pretty variable in a transformer not designed for DC.
                

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                • RE: Jumped in - artsybrute 06:49:30 09/13/09 (0)
                  In Reply to: RE: Jumped in posted by Paul Joppa on September 11, 2009 at 11:24:54

                  Thanks Paul.
                  
                  I assume you mean Paramour OPT (IIRC Foreplay only used B7's).
                  
                  So it seems to be a borderline situation. Are 3.3uF parafeed caps appropriate here?
                  
                  From what I've read, a high voltage cap would be inappropriate in a low voltage application. Is that correct in your view?
                  
                  
                  Triamp... Take a load off!
                  
                  

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    • RE: Jumped in - Caucasian Blackplate 11:04:20 09/09/09 (0)
      In Reply to: RE: Jumped in posted by Doc B. on September 09, 2009 at 07:39:22

      What size is your water bottle? I think I came up with a method that should work fairly well to do this...
      

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