Dr Ronald Stiffler SEC technology

[TinselKoala]

Try using Schottky diodes, small ones. Just make sure the total max reverse voltage of your diode ring is greater than the peaks of the received waveform.
If you have the Hitachi diodes I recommended earlier, try using just one, across one LED, very tight small loop area, and probe around your cellphone and wifi router and microwave oven door.

Basic wireless rx looks like this. At the frequencies 10 - 30 MHz your diode string wiring inductance and diode capacitance is enough to serve as the inductor and tuning cap in the schematic. The ground becomes virtual, again due to the capacitive coupling to the Earth. The reservoir cap smooths and accumulates the output which is available at the + - terminals shown.

[erfandl]

Well, I suggest testing it but keep a DC voltmeter across the supercap to see first how fast
the diode loop is able to charge it?  And when the 2.6 - 2.7 V DC level is reached then finish
charging unless you want to destroy it...

This suggestion is also valid for your 1000 uF, 63 V capacitor: no need for the Zener diode
protection directly across the capacitor if you always keep a DC voltmeter across it and you
continuously watch the voltage while testing.
If you have 5 pieces of 12 V Zener diodes, then they limit DC voltage across your 63 V cap at
roughly 60 V and bleed away any extra beyond that.
This will not be a loss when your looping is tested because the moment you connect the DC converter
across the capacitor, the 60V level will go down for sure. Notice that the converter I gave a link
to ebay finishes working under 30 V DC input to it, this can be a drawback.

Notice: I am not responsible for any damage your exploding capacitors may cause !! Be careful !!

Thanks gyula. No problem I am careful. is germanium diods like AA119 increased the output voltage? I want to test it with germanium loop diods. the germanium diods ( AA119 ) can harvesting the wifi radiation and convert it to DC voltage and can running one LED at high brightness.

[Ed morbus]

erfandl you can get from old power supply 200v electric capacitor

[erfandl]

erfandl you can get from old power supply 200v electric capacitor

I'm using 4400 uF 50 volt cap its very fast charging with loop diodes.

[gyulasun]

Thanks gyula. No problem I am careful. is germanium diods like AA119 increased the output voltage? I want to test it with germanium loop diods. the germanium diods ( AA119 ) can harvesting the wifi radiation and convert it to DC voltage and can running one LED at high brightness.

Hi Erfandl,

Yes, the AA119 Germanium diode type should have less forward voltage loss introduced into the loop,  in theory, than the 1N4148 or 1N914 Silicon types do. This is what I thought but I just checked Data sheet for the AA119 and I am a bit surprised because it says V_F=0.56 V at I_F=1 mA and V_F=1.5 V at I_F=10 mA which is simply much worse than an 1N4148 if true!!
So you can test it in practice of course but do not be surprised if results are not as favorable as with 1N4148 types.

With your digital multimeter, you can test forward voltage drop for any such diode, usually the forward test current is 1 mA and the DMM displays the forwards voltage drop.  You need to set the range switch into the Diode test position. What does is show for an AA119 and what does it show for a 1N4148: you can compare them.  At 1 mA, the AA119 may have less forward voltage but at 10 mA it may have higher than an 1N4148 or a Schottky diode TinselKoala did mention in Page 11. 

Gyula