Re: antenna impedance - calculated 10 - 20 Ohms - measured 36 Ohms??

Good question. I will play with that. That said, based on Roy's comment at minimum the load should appear nearly pure resistive.

I just tested the Autek with 6.25, 12.5, and 25 Ohm loads.
25 read 26
12.5 read 12 - 13 - 12 etc.
6.25 read mostly 7 with an occasional 6.

I would say for non-reactive loads it is pretty close.

Tomorrow - will be to experiment with non lumped inductors. That will be a challenge.

Thanks - Dan


Frank wrote:
"dansawyeror" <dansawyeror@xxxxxxxxxxx> wrote in message news:4403C93F.2040700@xxxxxxxxxxxxxx

Frank,

The Autek is remarkably close. I have used it to checkout 50 and 25 Ohm loads. For these two values it is very close. (It is battery level sensitive.)

The couplers are a pair of M-C ZFDC 20-4's.

Dan


Thanks Dan, I had forgotten about Mini-Circuits. Their price is hard to beat. I may pick up one of the "PDC" series dual directional couplers. Incidentally your code indicates resonance occurs at 3.54 MHz. I wonder how the Autek behaves when subjected to a reactive load does it actually get close to the magnitude?

Frank


.

Relevant Pages

  • Re: antenna impedance - calculated 10 - 20 Ohms - measured 36 Ohms??
    ... The Autek is remarkably close. ... loads. ... (It is battery level ... I may pick up one of the "PDC" series dual directional couplers. ...
    (rec.radio.amateur.antenna)
  • Re: antenna impedance - calculated 10 - 20 Ohms - measured 36 Ohms??
    ... From there simulation should show the best performance between varying the coils. ... I just tested the Autek with 6.25, 12.5, and 25 Ohm loads. ... Tomorrow - will be to experiment with non lumped inductors. ...
    (rec.radio.amateur.antenna)
  • Re: Rocephin (Ceftriaxone) & gall bladder
    ... I DON'T THINK EVAN WHITE HAD ANY GALL BLADDER PROBLEMS. ... CURED NOW - HAD LOADS OF IV ROCEPHRIN IN NJ. ... >> Frank, you dipshit...language is a malleable instrument. ...
    (sci.med.diseases.lyme)
  • Re: Collective nouns
    ... A babble of Beanies ... There must be loads more ... No. Frank. ...
    (uk.radio.amateur)
  • Re: Best Wishes During the Holidays
    ... Best wishes to you as well, Frank. ... Loads of info there. ... many stresses in the world, cultivation of our orchids can point to ... contolling the various pests and critters that so delight in my orchids. ...
    (rec.gardens.orchids)