Weiss FM demodulator

[aurelZ]

Hi
Is there more information about Weiss FM demodulator?
thanks!

 

[Martaine2005]

You could try here.

Martin

 

[aurelZ]

On the given link there is nothing about this type of demodulator or detector.
It is strange that there is so small amount of information about this.

 

[Martaine2005]

Yes, that's true.
I know what FM modulation/demodulation is but what is Weiss?
What are you trying to achieve?

Anything to do with metal detectors? as in discrimination or detection?
I am just curious.

EDIT: I just read this in Wiki....
Other FM detectors
Less common, specialized, or obsolescent types of detectors include:[8]

• Travis[9] or double tuned circuit discriminator using two non-interacting tuned circuits above and below the nominal center frequency
• Weiss discriminator which uses a single LC tuned circuit or crystal
• Pulse count discriminator which converts the frequency to a train of constant amplitude pulses, producing a voltage directly proportional to the frequency

Martin

 

[aurelZ]

Hi Martine
Yes this one ..
all what i have is this one i found on net.

 

[aurelZ]

And i already build one with npn transistor C383 -vhf type

 

[Martaine2005]

Ah ok. That circuit is on a Spanish website 'Radioaficion'.
Why not use their 'Mini chat' service y hablar.
There are thousands of circuits online that do not work. Might be why there is no info on this particular circuit.

Martin

 

[aurelZ]

mini chat ?????
i don't speak spanish
so i think that is usefull

 

[Martaine2005]

Google Translate?
Just trying to be helpful.

Martin

 

[aurelZ]

Heh i see
but that is not enough
In most cases specific problem
require:
knowledge about thematic
experience in thematic
so nothing wrong!