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#478
06-19-2020, 04:30 PM
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it is not IR optical detector. he says device uses UHF band and by noticing to video, it is clear that the detector is just a receiver which i think it uses available transmitted radio signal in the environment. TV stations transmitter signals or other sources, i do not know. but it seems to be RF receiver. 
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#479
06-19-2020, 04:44 PM
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but we can guess some there is a knob on the box and first he turn it until tune device the position of knob is seems to be variable capacitor such as available in MW or SW radio. also he says if gold target is less than 5 gram, device can not find it seems density of target is matter and size of surface is not important also he says it is short range detector something around 2 or 3 meters from target when put these signs together, i think the result is a kind of RF detector which uses high power signals which transmitting by radio or TV stations
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#480
06-19-2020, 07:27 PM
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Why You thinks that use UHF freq. , can also use so like RF receiver MW or SW band ,
İf this Detector is from only UHF Receiver , then will use any UHF fix Freq. and special Filter only for precious Metals , I think so . And knob can Variable Cap or Potans for Threshold gain .
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#481
06-22-2020, 10:44 AM
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good day
Here are a few measurements. hope to be useful for who interested to study Alonso-andreas PD. Please notice that written values are all approx. values depends on ?measurement device?, ?how to wind coils? and ?what size of wire used to?. Anyway, in any condition, I do not think the result will be out of the ?given range?. It seems presence of ? UHF ? signal is vital for device to work as a long range gold detector and Just by making and assembling, device just works such as normal metal detector and not as LRL. Once again: the UHF influences is taken from a video by Mr.andreas Christi, which is about ? pocket-size remote gold detector ?. This video available on youtube at his channel. Here I must say: many thanks to Mr.andreas Christi from Greece also special thanks to Daniel for wiring diagram. Here are a few pictures:
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#488
06-22-2020, 11:35 AM
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#489
06-23-2020, 07:53 PM
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The PD detects massive metal targets (like cars) from a medium distance? say 3-5 meters. Also when it finds a good old target, if you hold it stationary, has signal? regards
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#490
06-23-2020, 10:56 PM
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PD
Quote:
https://www.youtube.com/watch?v=wlU1t2C7Rs4
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#491
06-26-2020, 11:45 AM
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so in conclusion ,the Alonso PD is no-motion and detects very big metal sheets etc. I'm asking this because I had this "strange detection distance" with the ToTem (tuned in limits as you say).
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#495
06-28-2020, 11:22 AM
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66 KHZ receiver or transmitter? if you notice to values given and written on the schema, by calculation other frequencies will appear. practically as i measured by oscilloscope, not much difference in calculation and in performance. something is missing in alonso-andreas PD. there must be an "extra factor" which has crucial influence that PD need it to work and detect even fresh gold under ground.   here you can see 181 khz which measured by oscilloscope.my device 
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#496
06-28-2020, 09:04 PM
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but I don't remember Morgan or Esteban saying that this PD detects fresh gold. (is here, in this forum, or elsewhere, such a statement from them?)
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#499
06-30-2020, 10:29 PM
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THE ORIGINAL ALONSO PD
Quote:
see distance I get in a silver bracelet buried at 40cm 7 years ago, 6 meters https://www.youtube.com/watch?v=wlU1t2C7Rs4
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#500
07-01-2020, 10:36 AM
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To be more clear, 30cm detection distance on air test, it's not a long range detection for this "fresh" gold coin. Simply it's the expected distance from a typical metal detector. In my opinion, Alonso PD is not a "fresh gold" detector, regardless of the advertisement of some clone makers.
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Linear Mode
