SET Asylum

• Re: 211 MQracing 20:04:55 01/29/01 (4)
  In Reply to: Re: 211 posted by Hermit on January 29, 2001 at 17:32:48:

  Here are some operating points for such a 211 courtesy of Stereo Sound Japan.

  plate volts 480
  
  plate current 40 madc

  grid volts -20

  load resistance 10,000

  mu of 12

  power output 2600 milliwatts

  now... if I could only talk the big man from Cinci into doing a public domain schmematic of this in parafeed. Would love to hear this myself.

  One thing... man, that 211 would have to have a lifespan measured in decades. Grid easy to drive... not much plate current...

  Hey Dave S.--- run through this like you did in the other post. I enjoyed reading your commentary.

  have fun folks,

  MSL
  
  

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  • Re: 211, cinci boy takes a look :) Gordon Rankin 12:42:23 01/30/01 (2)
    In Reply to: Re: 211 posted by MQracing on January 29, 2001 at 20:04:55:

    Mikey and Gang,

    One thing you could do is use the BCP-125 to load the 211 and use a parafeed 10K.

    The power trans could also be small if you used say a Signal Transformer unit for the filaments.

    Best bet would be like a 417/5842 running at 10ma (best place for these suckers) cap coupled to a choke loade 211 using the BCP16-GCNI. I really have nothing that can measure this sucker, but would put the inductance at like 1500H. This configuration yields 2.75W class A but would go to A2 pretty darn easy!

    I will offer this up... If someone can get me a pair of WE242's I would be happy to up another DIY projected tried and tested on ETM.

    Gordon
    J. Gordon Rankin
    Wavelength Audio
    
    

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    • Quick,this man needs WE242's......STAT! FM 14:20:46 01/30/01 (1)
      In Reply to: Re: 211, cinci boy takes a look :) posted by Gordon Rankin on January 30, 2001 at 12:42:23:

      I'm sorry I don't have any 242's to lend.I hope some one does because I wanna build this amp you are scheming up!Does anybody how close the 242 and 211 are related?I thought the 242 was WE version of the 211.
      
      

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      • WE242=211 but with metal plates <nt> Gordon Rankin 15:15:24 01/30/01 (0)
        In Reply to: Quick,this man needs WE242's......STAT! posted by FM on January 30, 2001 at 14:20:46:

        nt
        J. Gordon Rankin
        Wavelength Audio
        
        

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  • Re: 211 Hermit 09:41:51 01/30/01 (0)
    In Reply to: Re: 211 posted by MQracing on January 29, 2001 at 20:04:55:

    Mikey,

    I've taken the bait, over on Bottlehead.

    John D.
    
    

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• Re: 211 Paul Barker 17:56:07 01/29/01 (0)
  In Reply to: Re: 211 posted by Hermit on January 29, 2001 at 17:32:48:

  Yep can you tell me too please?

  I have discovered the SV811-10 is very dynamic at 300v zero bias.

  Oh, and against all convention I prefer the 300b at low voltage, it out 2a3's a 2a3 at 2a3 operating points, but then why spend the money on a 300b just to use it as a 2a3?

  S'pose you need more like 500v on the 211, zero bias agin? That's just so easy, bias with a piece of wire, no cap no resistor.

  Regards

  Paul Barker
  
  

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