Posted by Damir [ 213.202.110.231 ] on December 03, 2005 at 14:50:33:

In Reply to: Re: The shunt capacitance of grid and anode chokes posted by manualblock on December 03, 2005 at 14:33:43:

For example, grid chokes I ordered have L=1700H and Rw=8kOhms. The AC impedance on the lowest frequency of interest is Z=2Pi*f*L = 2*3,141*20*1700 = 213,6 kOhms (as our Rg=220k we substituted), and even higher on higher frequencies (not infinitely, HF losses - Cw, etc.).
Good for the driver "point of view", and very good from output tube side - only 8k DC resistance in grid circuit.
But, even manufacturer (AE-Europe) doesn`t have Cw data - can be critical in combination with high rp driver.
Despite technical imperfections, the main reason is "better" sound. I do not have experience here, will report when I get them

Replies:

• this makes an interesting assumption... - PakProtector 16:27:25 12/03/05 (6)
  • Re: this makes an interesting assumption... - manualblock 20:44:23 12/03/05 (5)
    • Re: this makes an interesting assumption... - PakProtector 05:57:55 12/04/05 (0)
    • I think I can guess the origin of that quote.... - MQracing 23:12:12 12/03/05 (3)
      • Re: I think I can guess the origin of that quote.... - manualblock 08:15:29 12/04/05 (2)
        • Re: I think I can guess the origin of that quote.... - Damir 12:50:51 12/05/05 (1)
          • oscillation - PakProtector 17:31:02 12/07/05 (0)
• a much more succint explanation than mine :=)) - MQracing 15:16:25 12/03/05 (0)