• thank-you everyone for your well wishes.... {more} - mqracing 21:03:59 02/08/09 (8)
  In Reply to: RE: needing some MD love.... posted by mqracing on February 03, 2009 at 10:59:36

  you guys are a great group of folks and I'm lucky to have each of you
  as a customer and friend.
  
  Here are two bits of trivia--- 2009 marks our 20th anniversary of building transformers--- wow--- who would eave guessed---
  
  and 2009 is Peerless' 75th birthday.
  
  I was kicking around with my pal Steve Eddy that we should do a
  custom minted all copper coin marking these two anniversaries.
  
  And sometime this year we should do a not-done-before Peerless goodie to mark these anniversaries--- I always had one particular design in mind---though I am not sure there is sufficient market demand for an 80 watt 8K PP output trans to make all the numbers work--- but I've always thought I would like to build this particular Peerless tranney someday before I retire...
  
  what say you guys? what could or should we do to mark these anniversaries?
  
  
  
  MSL
  
  
  
  
  Builder of MagneQuest™ & Peerless™ transformers since 1989
  
  
  

  ---

  • oooo.... - pistoljoe 06:22:06 02/09/09 (7)
    In Reply to: RE: thank-you everyone for your well wishes.... {more} posted by mqracing on February 08, 2009 at 21:03:59

    I'm interested in hearing more about the 80W 8K PP. Is this something of yours, a peerless #, or something in between?
    
    Joe
    
    

    ---

    • RE: oooo.... - mqracing 07:04:47 02/09/09 (6)
      In Reply to: RE: oooo.... posted by pistoljoe on February 09, 2009 at 06:22:06

      Hi Joe:
      
      This would be a Peerless part number. The particular part I have in mind is perhaps the most rare piece they ever made (in the realm of PP tube type outputs). It was designed in the early fifties--- and short of pulling the folder--- by memory, it was only made in one small production run. It's a technical "tour de force" and would be very expensive to produce (as it was fifty some years ago as well). And key would be getting enough orders to make it all work as it would require several custom parts\materials to pull it off. It may well be too ambitious of an undertaking at this time in terms of having enough resources to pull everything together.
      
      If the above is not practical or real world-- there are several other candidates from the Peerless archives that are nearly as rare and mostly as delectable. Key would be that the part must be from the Peerless archives--- and it must be cool--- and it will only be done once by us.
      
      
      MSL
      
      
      
      
      
      Builder of MagneQuest™ & Peerless™ transformers since 1989
      
      
      

      ---

      • RE: oooo.... - Paul Joppa 11:52:13 02/09/09 (5)
        In Reply to: RE: oooo.... posted by mqracing on February 09, 2009 at 07:04:47

        80 watts at 8K plate to plate ... what on earth was it used with? (what tubes, I mean!) Has to be a thoriated Tungsten filament, doesn't it? 805s do more than 300 watts, so it's not that.
        
        Give us a hint, Mike - you'll get more orders if there's a circuit to use it with...
        
        Hmmm ... (looks around the basement dusty files for an hour or two) ... S-268Q? The Maestro? 6146's? :^)
        
        

        ---

        • good detective work.... - mqracing 12:42:01 02/09/09 (4)
          In Reply to: RE: oooo.... posted by Paul Joppa on February 09, 2009 at 11:52:13

          S-268-Q is correct. IIRC the one app for this output was PP 6146. Remember that this was designed in 1953/54-- so that the markets had already basically flipped to pentodes\tetrodes as opposed to triodes.
          
          msl
          
          
          
          Builder of MagneQuest™ & Peerless™ transformers since 1989
          
          
          

          ---

          • Reference - Paul Joppa 21:42:01 02/09/09 (3)
            In Reply to: RE: good detective work.... posted by mqracing on February 09, 2009 at 12:42:01

            Audio Anthology volume 3, page 16ff. "The Maestro - a POWER amplifier," Sarser and Sprinkle. Audio Engineering, 1952, originally. (For those who don't know, that journal split into Audio Magazine and the Journal of the Audio Engineering Society a few years later.) This is real historical Golden Age stuff.
            
            Here's an excerpt:
            
            "... so a conference was held with E. B. Harrison, of Peerless. On hearing the problem hesaid, "I think I can do it." Subsequently he has admitted it was a tough one. However, Harrison designed and built an output transformer for the 6146, and although originally built especially for this first amplifier, it is now in the Peerless line as type S-268-Q."
            
            The amp itself is Class AB with the accent on B - quiescent current 58mA, full power 254mA. So he transformer primary halves must be very tightly coupled indeed. The transformer, tested with a matched impedance rig, is down 1dB at 10Hz and 100kHz. 800 henries at full power, leakage 7mH. Wow.
            
            Last I heard, several years ago, David Sarser is still around and would LOVE to get his hands on a pair of these.
            
            I would speculate that a pair of 845s in deep class A, no feedback, would be spectacular with this. Anybody up for a "Seth on steroids"? Be afraid - be very afraid!
            
            

            ---

            • a bit more trivia for PJ.... - mqracing 07:30:41 02/10/09 (2)
              In Reply to: RE: Reference posted by Paul Joppa on February 09, 2009 at 21:42:01

              Did you know that Peerless also made an OEM (slightly modified) version of the S-268-Q?

              The 268 is utterly rare... I have only ever seen one pair and one single unit offered up in the past twenty plus years...

              I'll have to pull the folder but this was an incredibly difficult trans to build... and even Peerless had far more rejects at the end of the line than good units to sell. This had nothing to do inherently with the design (from an electrical POV) but that the secondary was wound with very, very thin copper foil and was insulated with an equally thin single piece of kraft paper... and what would happen is that the foil would short through the kraft from layer to layer...

              I suspect this is a solvable problem today--- wherein it would be possible to get the foil with a film dielectric bonded directly to the copper foil--- which would eliminate the foil and kraft paper slipping and then shorting--- other trick is that the foil must be absolutely burr free--- not even a hint of even-ness or rough edges to eliminate cut-through.

              
              Other difference is that Peerless offered the S-268 as a catalog item--- and given the difficulty of manufacture--- especially in volumes representative of it being a catalog item--- they quickly realized it was not optimized for "mass" production. I think that in a format of doing a very limited run--- with careful one person construction of the coil and then the assembly of the unit--- it would be possible to build these and make them bullet proof--- or at least as bullet proof as other standard offerings---

              but we're looking at much, much higher costs all around. these units made today with what I see as the challenges in materials sourcing and then in the utter care of one by one assembly--- I think we'd be looking at a min of $800 each. And maybe in the range of a grand to $1250 each depending on core goodies selected and etc...

              it's neat idea--- and worthy of Peerless' 75th anniversary--- but it might not actually be practical from an economic point of view. I'm not sure we could get enough units sold to make it pay off.

              The modified OEM version of the 268 would lessen all of the above specialty concerns in terms of materials sourcing and the specific manufacturing issues. my other concern (realization) is that push-pull applications in today's DIY market is really much more limited than coming up with say a neat SE project.

              So, I am also considering several other Peerless designs--- and in a conversation with Nullspace last evening we were kicking around the idea of a hot rod TFA-204/2004. Which I know your also a big fan of. There are still a few neat materials related tricks that we could look at doing with a 204/2004.

              Other designs worth looking at is the TL-404--- and doing some special stuff with cores, insulations, and magnet wire.

              Therefore, this is going to take a lot of mulling over and reflection--- before choosing a final project to mark the dual anniversaries of Peerless and MQ.

              We'll be discussing this later and at the appropiate time I will post further details, thoughts, and invitations for comments from our end users and OEM's.

              
              MSL

              
              

              Builder of MagneQuest™ & Peerless™ transformers since 1989
              

              
              
              

              ---

              Edits: 02/10/09   02/10/09   02/10/09

              • RE: a bit more trivia for PJ.... - pistoljoe 14:46:55 02/10/09 (0)
                In Reply to: RE: a bit more trivia for PJ.... posted by mqracing on February 10, 2009 at 07:30:41

                I would just say that there are lots of cool pieces available for SE, but not as many for PP. I personally prefer PP, although I can't say that five times fast.
                
                So, anything special from that era of peerless would be a treat and something I would certainly be interested in buying.
                
                I'll keep my eyes peeled for whatever you decide to wind.
                
                Joe
                
                

                ---
              • RE: a bit more trivia for PJ.... - Caucasian Blackplate 11:59:29 02/10/09 (0)
                In Reply to: RE: a bit more trivia for PJ.... posted by mqracing on February 10, 2009 at 07:30:41

                How many units would you need to sell?
                
                

                ---
• RE: needing some MD love.... - pistoljoe 14:53:21 02/05/09 (0)
  In Reply to: RE: needing some MD love.... posted by mqracing on February 03, 2009 at 10:59:36

  Mike,
  
  That is a bummer. Not only the aches but also knowing you're not 19 anymore. But at least the Dr actually found something wrong and you have a plan to get better.
  
  take care,
  Joe
  
  

  ---
• From my favorite movie ...The Princess Bride - danlaudionut 20:55:11 02/04/09 (0)
  In Reply to: RE: needing some MD love.... posted by mqracing on February 03, 2009 at 10:59:36

  Mike
  
  “You know what they say if you don’t have your health,
  you haven’t got anything” –
  (Quote from The Princess Bride)
  
  Take care of yourself
  DanL
  
  PS It was said to the General in response to the Prince's line:
  "You know how much I enjoy watching you work.
  (Torturing the hero on the a life sucking rack)
  I have our country's anniversary celebration to plan,
  my wife to murder and Guilda to frame for it.
  I am totally swamped." 8^D
  
  
  
  

  ---
• rest up! - Jim Dowdy 11:39:49 02/04/09 (0)
  In Reply to: RE: needing some MD love.... posted by mqracing on February 03, 2009 at 10:59:36

  Take care of yourself, bro.
  
  Believe it or not, I was going to call and order another pair of FS-100 plate chokes this week...but, it was only to have an extra pair on the shelf.
  
  

  ---
• RE: needing some MD love.... - nullspace 08:57:04 02/04/09 (0)
  In Reply to: RE: needing some MD love.... posted by mqracing on February 03, 2009 at 10:59:36

  Hey Mike,
  
  That sucks. I hope your injuries heal quickly.
  
  If you could use some volunteer help, I'd be more than willing to come over and move boxes or whatever.
  
  Regards,
  John
  
  

  ---
• get well soon - keto 00:11:43 02/04/09 (0)
  In Reply to: RE: needing some MD love.... posted by mqracing on February 03, 2009 at 10:59:36

  Man, sorry to hear about the injuries. Hope you find all that necessary R and R and TLC, and that you're feeling better soon.
  
  

  ---
• Take care Mikey - Mr. Lowther 19:38:17 02/03/09 (0)
  In Reply to: RE: needing some MD love.... posted by mqracing on February 03, 2009 at 10:59:36

  Sorry I can't help from Chicago, but if there is something I can do please let me know.
  
  Take your calcium pills and rest.
  
  
  
  Jon Ver Halen
  
  

  ---
• Take care nt - gluca 11:59:37 02/03/09 (0)
  In Reply to: RE: needing some MD love.... posted by mqracing on February 03, 2009 at 10:59:36

  .
  
  

  ---

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