Hi all,
I am trying very hard to resuscitate my car remote alarm. The remote is able to lock and unlock the car when I activate it in the car; very near distance. But it is not able from further distance.
A marking on the capacitor, C1 is missing. Is there anyway to compute the range of the values for this capacitor and I use a variable capacitor to tune it. I had read much from the internet and think it is about 9 to 10 pF; but it only extend the distance very little.
I am playing with a field strength meter and testing many capacitor values and they seemed not to work properly. RF electronics is really tough especially if one does not have the oscilloscope to view it's workings.
I would appreciate if someone can explain to me how this circuit works or direct me to places that I can learn more about this sort of circuit.
Many thanks in advance.
I am trying very hard to resuscitate my car remote alarm. The remote is able to lock and unlock the car when I activate it in the car; very near distance. But it is not able from further distance.
A marking on the capacitor, C1 is missing. Is there anyway to compute the range of the values for this capacitor and I use a variable capacitor to tune it. I had read much from the internet and think it is about 9 to 10 pF; but it only extend the distance very little.
I am playing with a field strength meter and testing many capacitor values and they seemed not to work properly. RF electronics is really tough especially if one does not have the oscilloscope to view it's workings.
I would appreciate if someone can explain to me how this circuit works or direct me to places that I can learn more about this sort of circuit.
Many thanks in advance.
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