Wednesday, September 5, 2012

Directly Heated Triode Line Stage...

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directly heated triode line stage
71a or Western Electric tennis balls
mercury rectified
film and foil in oil capacitors
six hand wound pieces of nickel (permalloy)
sixteen pieces of iron total
remote with balance and mute
-47dB to +15dB in 1dB steps

10dB bandwidth = 3Hz to ~1MHz
1dB bandwidth = 14Hz to 125kHz

steel, brass, bronze, walnut, and maple chassis



 
 

  

 









and the filament glow....

15 comments:

  1. Jeffrey,

    Those are sweet looking boxes. Plan on raffling those off! :)

    ReplyDelete
  2. I just received mine from Jeffrey and it sounds as wonderful as it looks. In fact, it may be an even bigger upgrade than my Kahn phono. Now if I can just find a reasonably priced pair of 104D tennis balls to try! Thanks JJ.

    Evan

    ReplyDelete
  3. Drool, Drool and more drool

    Absolutely exquisite.

    Mark

    ReplyDelete
  4. Super, Buck Rogers' age piece of gear, Jeffrey.
    An instant classic beauty.

    ReplyDelete
  5. When is Rockford Fosgate's Hafler division going to put out the kit version? :D

    ReplyDelete
    Replies
    1. The Chinese PCB version is already on ebay. Whoa...That was fast!

      Delete
  6. Nice! And the brass name plate just for this line stage. Impressive.

    Tony

    ReplyDelete
  7. Very nicely done! (I have a pair of 104D tennis balls if someone is looking for some... probably wont' get around to using them anytime soon...)

    -Ed

    ReplyDelete
    Replies
    1. Hi Ed, do you still have the 104D available? Thanks. Evan

      Delete
  8. For LCR ria kahn?
    i use gotto`s drivvrs would it be nice to combine?

    ReplyDelete

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