Posted by PakProtector [ 172.149.29.50 ] on December 12, 2005 at 19:55:02:

Hey-Hey!!!,
I just got the C-core gird chokes from Heyboer. Nice looking and right on spec.

With a small gap they run from 575 Hy to 600 Hy from .5 vac @ 60 cps to 40vac. The gap does its job just like it should, and there is plenty of inductance. About 30kOhm per half at 20 cps( 2Pi*20*(L/2)).

I plan to do full spectrum measurements on it soon. My Heathkit signal generator needs two 9V batteries, and I can't rob the smoke alarms anymore...:)

I plan to set voltage level and measure Z across the spectrum. I wonder how it will do. And of course a few commercial grid chokes for comparison will make for some entertaining comparisons.
cheers,
Douglas

Replies:

• Re: C-Core grid chokes - Damir 12:33:30 12/13/05 (10)
  • measuring grid chokes - PakProtector 17:05:54 12/13/05 (9)
    • Re: measuring grid chokes - colinhester 18:52:18 12/14/05 (3)
      • Re: measuring grid chokes - MQracing 19:36:48 12/14/05 (1)
        • purpose for measuring grid chokes - PakProtector 20:18:47 12/14/05 (0)
      • Re: measuring grid chokes - PakProtector 18:59:20 12/14/05 (0)
    • Re: measuring grid chokes - Wayne Parham 09:52:32 12/14/05 (4)
      • Re: measuring grid chokes - PakProtector 10:50:55 12/14/05 (3)
        • Re: measuring grid chokes - manualblock 14:07:22 12/14/05 (2)
          • Re: measuring grid chokes - PakProtector 15:24:07 12/14/05 (1)
            • Re: measuring grid chokes - manualblock 20:52:48 12/14/05 (0)