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  #251  
Old 01-10-2021, 01:27 PM
Pahom Pahom is offline
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Good afternoon Morgan! You can find out about the version of the receiving part of the DCX-85 that you use on the LM741?
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  #252  
Old 03-11-2021, 08:52 AM
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Good afternoon Morgan! You can find out about the version of the receiving part of the DCX-85 that you use on the LM741?
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Originally Posted by Morgan View Post
here some TDA FM radios schematics :
Hello there are two events in the morgan FM receiver. The first is the transmitter, that is, the local oscillator. The second is the buyer duty. Do you know the value of the local oscillator when making your settings? You can understand this with two fm radios. Tune one of the FM radio to 103 MHz and change the frequency of the other FM radio. You will see that the fm sound of the 103 mhz radio is muted.
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  #253  
Old 03-11-2021, 09:17 AM
abdou2014 abdou2014 is offline
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I had an experience that looks like this , why two fm receiver ?

i tried with one radio that will have the sound cut off at a specific frequency , and after what?

how to use this experiment to detect the phenomenon? I had a lot of theory , and my radio

detect sudden electromagnetic fields at a distance
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  #254  
Old 03-11-2021, 09:21 AM
abdou2014 abdou2014 is offline
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there is a great experience that comes to you after these results, and that is the key
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  #255  
Old 03-11-2021, 09:54 AM
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If we can determine the transmitter frequency, we can experiment to evoke this frequency golden phenomenon.

You should publish the fm receiver circuit diagram.
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  #256  
Old 03-11-2021, 10:52 AM
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The frequency of the fm radio in the 103 MHz transmitter position of the fm radio in the receiver position is around 88 mhz.
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  #257  
Old 03-11-2021, 11:14 AM
abdou2014 abdou2014 is offline
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what do you mean by ( fm radio in the 103 MHz transmitter position) ?

both radio receivers ?

my experience and results are different from yours, my radio detects the phenomenon and

operates like a BFO and electric receiver
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  #258  
Old 03-11-2021, 11:54 AM
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both radio receivers ?
yes.

There is another frequency that your receiver works like a transmitter in the frequency position.
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  #259  
Old 03-11-2021, 11:57 AM
abdou2014 abdou2014 is offline
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where is the interest ? how used for detection ?
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  #260  
Old 03-11-2021, 11:59 AM
abdou2014 abdou2014 is offline
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my transmitter circulates in the receiver, and calibrated to a critical position
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  #261  
Old 03-11-2021, 12:11 PM
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you make another from the same buyer. You understand the event. You set the 103 or 104 mhz receiver, in contrast to the other receiver, when you set it to 88 MHz, the fm sound is cut off. Here we can find what frequency it is, we find the phenomenon value for gold.
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  #262  
Old 03-11-2021, 01:10 PM
abdou2014 abdou2014 is offline
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Thank you for sharing your experience
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  #263  
Old 03-11-2021, 04:22 PM
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From my experience there isn't special frequency for gold etc... (at bands that we can work!!!). There are some bands with better response or lower noise and nothing else.

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  #264  
Old 03-11-2021, 11:09 PM
Douglass Douglass is offline
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Many devices are made with frequencies x as if there was a selective frequency for a given substance, maybe there is a certain frequency range for a given substance. Within these bands and dominating its forces the gold will be right there .....
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  #265  
Old 03-12-2021, 12:03 AM
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Quote:
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From my experience there isn't special frequency for gold etc... (at bands that we can work!!!). There are some bands with better response or lower noise and nothing else.

Dear Geo , İn my experience , I see that have any special frequency for localization .
no find Buried in all lower noise frequency . But here problem is that , I can not measure
this working frequency .

Regards
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  #266  
Old 03-12-2021, 06:03 AM
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my transmitter circulates in the receiver, and calibrated to a critical position
hello abdou2014 what is the frequency on your tda7000 receiver.
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  #267  
Old 03-12-2021, 06:24 AM
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zakari zakari is offline
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hi all
brian you are right

i get the good result with 104.5 mhz tx and 80 mhz rx

best regard zakari
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  #268  
Old 03-12-2021, 07:46 AM
abdou2014 abdou2014 is offline
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hello abdou2014 what is the frequency on your tda7000 receiver.
there is one thing special with TDA7000 , excuse me but I can't all say

I advise you to do a lot of experiments
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  #269  
Old 03-12-2021, 12:03 PM
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Quote:
Originally Posted by brain View Post
The frequency of the fm radio in the 103 MHz transmitter position of the fm radio in the receiver position is around 88 mhz.
When Local OSC (Tx) of one Radio is same with input of other FM Radio in Receive mode
(+ some use 10.7Mhz IF ) , So Radio calibrated for Receiver will stopid noise from Speaker
ssssssssssssssssssssssssssssssssssssssssssssssssss ssssssssssssssssssssssssssssssssssss
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  #270  
Old 03-12-2021, 04:31 PM
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From my experimets... i found buried objects with below frequencies...

60Khz,62 Khz, 75Khz, 78Khz, 80Khz, 84Khz, 88Khz, 92Khz, 100Khz, 125Khz, 133Khz, 250Khz, 500Khz, 513Khz, 1Mhz,80Mhz, 84Mhz,110Mhz,438Mhz.
Do you mean that all these frequencies are special frequencies??? or the gold emmits a signal at these frequencies???
Nothing of these....
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  #271  
Old 03-12-2021, 05:40 PM
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hello geo
Is there a local oscillator at these frequencies.when passive or active

I will share the fm receiver circuit

I want to review this. Does it look like alonso pd
[IMG][/IMG]
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  #272  
Old 03-12-2021, 06:39 PM
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Quote:
Originally Posted by Geo View Post
From my experimets... i found buried objects with below frequencies...

60Khz,62 Khz, 75Khz, 78Khz, 80Khz, 84Khz, 88Khz, 92Khz, 100Khz, 125Khz, 133Khz, 250Khz, 500Khz, 513Khz, 1Mhz,80Mhz, 84Mhz,110Mhz,438Mhz.
Do you mean that all these frequencies are special frequencies??? or the gold emmits a signal at these frequencies???
Ok , this is your success , but in me not is so , for full FM sensitive working system it is
only in some special frequency ,
also dear Dubulumatch and Esteban say about special phenomenon frequency in FM .

In my last attempt with FM, the phenomenon burned out the Buzzer floor of my device, I was very surprised .
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  #273  
Old 03-12-2021, 06:48 PM
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Originally Posted by brain View Post
hello geo
Is there a local oscillator at these frequencies.when passive or active

I will share the fm receiver circuit

I want to review this. Does it look like alonso pd
[IMG][/IMG]
Yes Q1 works as local oscillator. You can make it to oscillate between 80 and 110 Mhz by playing with coil and trimer ....
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  #274  
Old 03-14-2021, 06:30 AM
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Quote:
Originally Posted by humhum View Post
Ok , this is your success , but in me not is so , for full FM sensitive working system it is
only in some special frequency ,
also dear Dubulumatch and Esteban say about special phenomenon frequency in FM .

In my last attempt with FM, the phenomenon burned out the Buzzer floor of my device, I was very surprised .
hello humhum
What is the fm receiver frequency.?
Are you using 80mhz or 110mhz?
What is the IF frequency? Is it possible to write them.
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  #275  
Old 03-14-2021, 09:05 AM
abdou2014 abdou2014 is offline
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Hi Brain , why you don't use display ?
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