Posted by mqracing (M) on February 20, 2009 at 11:15:03

In Reply to: RE: Seth current draw posted by soulcargo on February 20, 2009 at 06:28:23

Hi SC:

How much plate current are the 300B's being run at? How much current on the front end tube.

I went to our website (www.magnequest.com) but the SETH there is the 2A3 version---

our 04-002 chokes can be airgapped for 100 mils, 150 mils, and 200 mils.

Advantage of 150 mil choke (all other things equal) is that you would get 150% more L--- which makes for better power supply filtering (again, all other things equal).

MSL



Builder of MagneQuest™ & Peerless™ transformers since 1989

• RE: Seth current draw - soulcargo 12:29:58 02/20/09 (2)
  In Reply to: RE: Seth current draw posted by mqracing on February 20, 2009 at 11:15:03

  I've never built a PP amp. The SETH will be my first.
  
  So I'm not sure how much current the PP 300bs will consume.
  
  I figured someone else might know.
  
  

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  • RE: Seth current draw - keto 16:17:39 02/25/09 (1)
    In Reply to: RE: Seth current draw posted by soulcargo on February 20, 2009 at 12:29:58

    here's an option for PP300B
    
    for 20W and a 4K plate to plate load, looks like the current would swing from 170mA to 200mA, in A1.
    
    I don't know what A1 means ;-)
    

    • http://www.westernelectric.com/spec_sheets/300B.pdf   (Open in New Window)

    
    

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    • Thanks! (nt) - soulcargo 06:18:37 02/26/09 (0)
      In Reply to: RE: Seth current draw posted by keto on February 25, 2009 at 16:17:39

      nt
      
      

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