From: psymondsnospam@comcast.net   
      
   Well, this certainly gives one an appreciation for the sublime.  It's a good   
   thing wire is cheap ;-}   
      
   I chose 22AWG for the secondary and barely fit 152 +/- turns, with taps at   
   76 and 104.  I was thinking this would result in 8K to 4-8-16.  That was the   
   plan.   
      
   I hand wound the secondary.  I found that it is very difficult to keep track   
   of turns.  I did, however, accurately figure that I could get 38 turns in a   
   layer.  In practice, due to my lack of manual skill, I ended up with about   
   35 turns per layer and wound 4 layers.  At first, I thought I had badly lost   
   track.  I did loose it somewhere, but it wasn't all that bad.  It is also   
   hard to do this neatly.   
      
   I saved the fish paper for the primary and put it back.  Actually, it was   
   probably from the secondary, but I used it to cover the primary.  I used   
   green high temp polyester (?) tape (stuff meant for this sort of thing) to   
   wrap outer layer of the secondary.  It all barely fit on the tongue of the E   
   lams.  I chose to leave the existing gap, which mic'd at about 0.6mm.   
      
   I think the most significant error was my estimate of primary turns.  I   
   believe now that primary turns are approximately 3800 and the primary wire   
   gauge is 39AWG.  I bought a surprisingly nice digital caliper on eBay for $8   
   and its measure says the wire is #39.  The number of turns makes sense with   
   the DCR of the winding.   
      
   Assuming that I did wind 150 or so secondary turns -- I think I did -- these   
   are the test results from the 3 taps:   
      
   10225:16 ohms, turns ratio = ~25   
   9544:8 ohms, turns ratio = ~35   
   10000:4 ohms (exactly, oddly enough), turns ratio = 50   
      
   The 16z and 4z taps both suggest primary turns are around 3800; the 8z tap   
   must be in the "wrong" place, as it suggests primary turns are around 3500   
   and the primary z is "low".   
      
   I have no idea if I will ever use this OT.  It will go on the bone pile for   
   some future project, or not.   
      
   It was educational.  I had some fun.  I learned more than I bargained for.   
      
   Many thanks to Patrick and Flipper for informing me along the way.   
      
   Regards,   
   Phil   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)