Dr Ronald Stiffler SEC technology

[itsu]

Nick,

all good points, thats why i stopped working on these circuits, its not really of practical use and i do not see that
it will lead us anywhere for the time being.


Itsu

[NickZ]

   Itsu:   Aren't the two cap on the loop supposed to be 10nf, instead of 100nf? Would that make any difference?
I already have a 0.1uf cap before the L3. And two 0.01uf caps on each loop.
   Looks like the loop leds are not as bright as your single led placed in the middle.

[itsu]

Nick,

the reactance of 100nF at 13Mhz is 0.12 Ohm, the reactance of 10nF at 13Mhz is 1.2K, so therefor i went for 100nF.
https://www.allaboutcircuits.com/tools/capacitor-impedance-calculator/

Indeed, the single led is way more bright, but its a sensitive led.

Itsu

[gyulasun]

The reactance of a 10 nF capacitor at 13 MHz is 1.2 Ohm.  You could measure only a small, negligible difference in performance versus a 100 nF capacitor in such, relatively low power setup when a 10 nF is in series with L3.
When two 10 nF caps are included in the loop, they may have some current limiting effect ,  consider 2 x 1.2 Ohm (at 13 MHz) instead of 2 x 0.12 Ohm.  If loop current is say 10 mA, calculate the voltage drops across them using Ohm's law and learn the difference.

[itsu]

I did it again,  silly me.   

Gyula is right off course,  10 nF capacitor at 13 MHz is 1.2 Ohm.

Thanks, Itsu