ALONSO PD MISSION ACCOMPLISHED V1,V2

[folharin]

I can't measure my setting FM receiving frequency , because it is very power low signal ,
, IF of some FM receiver is 10.7 Mhz , IF of AM receiver is 455Khz , This is after
mixing of input and local OSC , but TDA7000 not use 10.7Mhz , only few Khz .

about IF see this link :

https://www.analogictips.com/radio-receiver-architectures-part-1-trf-superhet/

https://www.analogictips.com/radio-r...rt-2-zero-sdr/

exactly this point you also concluded the analysis as I arrived at this same conclusion

[folharin]

: |

[humhum]

exactly this point you also concluded the analysis as I arrived at this same conclusion

You mean that , Your exactly result can't measure setting FM receiving frequency or
phenomenon ?
( because it is very power low signal )

[brasilpb]

I believe that any radio can work.

[folharin]

You mean that , Your exactly result can't measure setting FM receiving frequency or
phenomenon ?
( because it is very power low signal )

exactly!

[brain]

hello i noticed that gold is sensitive between 84-86mhz on the oscilloscope screen
humhum x osilator has an effect on the phenomenon

[humhum]

hello i noticed that gold is sensitive between 84-86mhz on the oscilloscope screen
humhum x osilator has an effect on the phenomenon

Hi Brain , this is Very Good , peak center Freq 85 Mhz in Your Country .

[folharin]

hello i noticed that gold is sensitive between 84-86mhz on the oscilloscope screen
humhum x osilator has an effect on the phenomenon

and khz? already tested?

[Bhagye]

Hello dear members,

Are you talking that you measured oscillation of piece of gold, using oscope and some kind a home made circuitry?? Some one can please explain me how do you measure gold frequency with an oscilloscope??

[folharin]

no..the test is done with buried gold!

[LRLMAN]

Hi Brain , this is Very Good , peak center Freq 85 Mhz in Your Country .

Hello HUM HUM thanks for the answer before my question ... and I just mentioned what is the function of an oscillator in an LRL detector ..... stimulating the receiving antenna (increasing its sensitivity) of an Lrl detector o only serve to impact a buried target of much more than yellow metal or white and generate a stimulating phenomenon surrounding this buried metal ???

And on the other hand I would like to ask you what would be the Maximum central frequency in Mhz or Khz for Mexico ????

Regards.....LRLMAN.

[Pahom]

The harmonic frequency depends on the most powerful transmitting device in the area being searched. And for this reason, the frequency is different everywhere.

[brain]

is this your DCH85 , or using other model?

What is 555 frequency?

[brain]

transmitter for What is 555 frequency?

[brain]

the Alonso PD use the metal detector circuit HeatKit, its a TR/IB sistem, according Esteban a BFO with cristal controler is the best for stability, I want to try but the cristal is hard to find...

here schematic

hello, is the morgan bfo detector sample suitable for your business?

https://www.hobby-hour.com/electronics/s/bfo-metal-detector.php