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Re: gridchoke question

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In Reply to: gridchoke question posted by horny on May 2, 2007 at 22:46:52:

Robert,
A grid choke in the dc realm looks like a short in theory. But in the case of the BCP16NAGH it is more like about 5000 ohms. In the AC realm because of the inductance it looks an infinite resistence in theory or reality a Z of about 200K.
This is exactly what a tube wants to see. In the dc realm a very low impedance. In the AC realm you want the driving signal to see an infinate impedance and this is why a GC works so well.
Do note that placement of the grid choke is critical. As with high inductance these little guys will pick up noise like crazy. I actually stick my power transformer and my grid choke a opposite corners before I place any other components.
Thanks
Gordon
J. Gordon Rankin

Topic - gridchoke question - horny 22:46:52 05/2/07 ( 12)

Re: gridchoke question - mqracing 10:56:41 05/3/07 ( 0)
Re: gridchoke question - Gordon Rankin 05/3/07 07:42:01 05/3/07 ( 10)
- Re: gridchoke question - horny 08:11:42 05/3/07 ( 9)
  - Re: gridchoke question - mqracing 10:30:45 05/3/07 ( 8)
    - Re: gridchoke question - horny 11:10:14 05/3/07 ( 7)
      - Some suggestions - Gordon Rankin 08:53:44 05/4/07 ( 4)
        
        Re: Some suggestions - horny 14:56:40 05/4/07 ( 3)
        
        Re: Some suggestions - Gordon Rankin 11:26:32 05/6/07 ( 0)
        
        Re: Some suggestions - danlaudionut 19:34:46 05/5/07 ( 1)
        
        Re: Some suggestions - horny 03:26:32 05/6/07 ( 0)
      - Re: gridchoke question - pistoljoe 15:49:42 05/3/07 ( 1)
        
        Re: gridchoke question - horny 22:51:44 05/3/07 ( 0)