Gold Gun with Gemini III Transmitter

[abdou2014]

Thanks nice job, can you poste the schematic of TX circuit pls ?

[GOLDEN LILLY]

I will give you the schematic through your email. I cannot post it without the permission of the owner who is a member of this forum.

[GOLDEN LILLY]

WM6, is loop antenna different from L2? What do you mean by intersection of loop antenna and L2? I need more clarification please....

[abdou2014]

faycal_44@yahoo.fr

[taxma1981]

Originally Posted by GOLDEN LILLY

Taxma, what special ferrite do you have? Please give me information. I bought ferrite rod from Latvia on ebay. The size is 10mm diameter and 7.5 inches long. I experimented the number of turns and wire gauge. I clearly hear my analogue watch ticking from several inches. My problem now is the RMS converter and LCD display which is not available in my place. So, i intend to use spectrum analyzer apps for visual indication. The vlf Signal in my place is weak. I just hear the signal clearly last December 2016 but now no more. So i made a signal generator as transmitter based on the above schematic but lacks the distance because i have a little idea on the matched antenna for the circuit.
Please give information on your special ferrite. My email is errel74@yahoo.com.

Try with more turns 500+500 or more,i use 2 ferrite 15cm

[WM6]

Originally Posted by GOLDEN LILLY

WM6, is loop antenna different from L2? What do you mean by intersection of loop antenna and L2? I need more clarification please....

Intersection mean surface of intersected wire in square mm (mm2) or Cross sectional area.

par example:

If L2 is 1 turn coil of wire 3mm in diameter and Loop antenna is 200 turns of wire 0.22mm in diameter, if converted in Cross sectional area:

1T/3mm=1x7mm2=7mm2 < 200T/0.22mm=200x0.04mm2=8mm2

so if we compare Cross sectional area: 7mm2 < 8mm2

This suit to rule that total of Cross sectional area of Loop antenna should not be less than Cross sectional area of L2.

[GOLDEN LILLY]

WM6, thank you for your explanation. However, i still do not understand the coil construction. Is the secondary winding the loop antenna itself? or there is another loop coupled in the said secondary winding? Please make a drawing...

[WM6]

Originally Posted by GOLDEN LILLY

WM6, thank you for your explanation. However, i still do not understand the coil construction. Is the secondary winding the loop antenna itself? or there is another loop coupled in the said secondary winding? Please make a drawing...

There is drawing in post #40.

Loop antenna is connected to L2 (output L2 wire to input loop antenna wire).

But this was only explanation to abdou2014 previous question and as I say, it is practically nonsense to connect loop antenna this way (in contrary to telescopic antenna).

Loop antenna can be (much better) connected instead of L1 (L1 act in this case as loop antenna). Of course in this case L1 should be wound (dimensionally and by other parameters) as loop VLF transmitting antenna (and not as one simple inductor).

[abdou2014]

What is the position of the ferrite antenna and a telescopic antenna transmitter for nulling ?

[abdou2014]

I want to add an emitter

[GOLDEN LILLY]

WM6, your implying that a loop antenna without an inductor is far more better than with an inductor. So if this is the case, please can you recommend loop size and windings and wire diameter? My loop antenna is a rectangular in shape with 26 turns, # 22 AWG directly connected from the output of the power transistors without ferrite. I based my antenna shape from magnacast lrl. Please comment.

[GOLDEN LILLY]

Abdou2014, i am still looking the transmitter schematic from my files. I forgot what folder i saved it. Just give me time. Anyway, you have a very nice gold gun.

[abdou2014]

thank you , i'm waiting

[WM6]

Originally Posted by GOLDEN LILLY

WM6, your implying that a loop antenna without an inductor is far more better than with an inductor. So if this is the case, please can you recommend loop size and windings and wire diameter? My loop antenna is a rectangular in shape with 26 turns, # 22 AWG directly connected from the output of the power transistors without ferrite. I based my antenna shape from magnacast lrl. Please comment.

Loop antenna is an inductor too (air core inductor).

Your antenna could be OK, you need to manage it to desired frequency by proper capacitor set in antenna tank circuit. Better way by try and measure.

[GOLDEN LILLY]

Thank you WM6. I will Make a trial and error for my coil. Anyway, what frequency should i use for my gold gun transmitter. Should i also need to modulate my transmitter?

[abdou2014]

NEW TX

[abdou2014]

[GOLDEN LILLY]

Hi Abdou. Please tell us about your new transmitter...What are the component values?

[abdou2014]

I have not yet finished, I do experiments , pls WM6 What are the best antennas for a transmitter, telescopic or loop ?

[WM6]

With loop antenna you can acheive better (desired) wave propagation and (possibly) direction to avoid unwanted reflexy from objects out of your interest.

[abdou2014]

Thank you WM6 , The blind spot ( nulling ) does not disappear with a powerful transmitter loop ?

[abdou2014]

When I turn on, the frequency changes and slowly decreases, is there a way to stabilize it ?

[WM6]

After about 10 min it should be temperature stabilized.
In case that outer temperature sources, like sun/shadow, destabilize your circuit,
(multiple) potting your board in paraphine can help.
Paraphine is great temperature insulator and temperature changes compensator.

[abdou2014]

Thank you WM6 , I noticed that even after 10 minutes the frequency is not stable , I mixed TX totem with this circuit I have a stable frequency.

[abdou2014]

circuit + pcb