Quote:
Originally Posted by nelson
Hi Morgan.
My first try with pdk that convince me that is detecting something, was in my house when i pointed to the corner celing of my house entry, pdk did show a signal on that place. Then i realize that what it whas detected could be a power line, but i also know that from that place no electric line is passing. Then i change the Rx capacitor to move frequency higer (around 56 Khz). THen same test shows no signal at all.
After this i returned the old capacitor to stay on my first RX frequency (40 Khz), i made the same test pinpointing pdk to the same place it detected before and nothing was detected till today.
I know that pdk works, but i also know that must be tunned to correct frequency. I don´t want to tune it to gold frequency jet, i just want to tune copper frequency, cause this will allow me to do lots of test on deferent fields. Copper is everywere and can be used to increase pdk performance in multiple ways. After this test, is just a mater of changing the RX frequency to gold or even silver.
After this test i will try another coil stimulator, cause my first coil was not stable.
Also is important to know if coil stimulator must be above or below RX frequency and what it should be the best shift frequency.
I wish i can get good anwers and not the same responses that we use to read here and that fanally don´t allow to advance on pdk project, specially for people like me that don´t have an electronic degree, i just a hobbist
Regards
Nelson
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Hi nelson,
Take a look at the coils which can detect RF in your PDk.
If you are familiar with RF reception from a loop, you will see that the direction your PDK points is a null point.
The signals which you can receive come from the sides of the coil, not the front.
But since you are using a super sensitive detector circuit which is nearly unstable, in theory you could detect a move from null to nearly null.
But I doubt this is what is happening in your case.
My guess is you are more likely detecting noise which probably comes from man-made sources and propagates in the ground and through walls at VLF frequencies.
This kind of noise tends to follow strongly in paths which telluric currents favor, or follow underground conductors more easily such as pipes and cables.
Is it possible there are any metal pipes or cables under your house, or to the sides of where the coil is pointed?
One way to test is to put a portable oscilloscope on the loop or early stages of the receiver, and examine the signal you receive when you point the PDK at the corner of the house.
Then connect the oscilloscope to a pair of ground probes placed in the ground where you are standing, separated by 2 meters.
I am guessing you will find some kind of signal in the ground that is similar to what you receive in the receiver.
If you cannot put ground probes then you can connect a simple loop with 30 turns to your oscilloscope set to low uV scale.
When you will move the loop around the air you will find a lot of noise in your house.
I believe you will find enough noise even if you turn off all the power to your house, because neighboring houses will send noise which you can detect in your house.
But you shouldn't be testing the PDK inside your house anyway, because houses are full of electronic noises which will propagate through the air and through the ground.
The people who claim success to tune a PDK say you need to be far away from any house or power... I believe 100 meters is good enough.
Only simple power testing or spark tests are done near buildings that have electrical power.
-- Just an idea,
Best wishes,
J_P