Nina
Junior Member level 1
varicap circuit
Looking for a Simple Surveillance Transmitter (VARICAP !!!) Schematic.
About 110 -130 MHz, as small as possible... Need this plan very badly !!!
Another related problem I have: I'm trying to build a "mains" operated xmitter.
Using a transformerless PS ( a serial capacitor + diode bridge + filter capacitor) gives me very much humming, even a stab. doesn't solve this problem.
I know that such device is been sold over the net, and I'm curious how they solve this humming problem or your idea.
I'll be very thankful for your help.
TIA
Nina
Looking for a Simple Surveillance Transmitter (VARICAP !!!) Schematic.
About 110 -130 MHz, as small as possible... Need this plan very badly !!!
Another related problem I have: I'm trying to build a "mains" operated xmitter.
Using a transformerless PS ( a serial capacitor + diode bridge + filter capacitor) gives me very much humming, even a stab. doesn't solve this problem.
I know that such device is been sold over the net, and I'm curious how they solve this humming problem or your idea.
I'll be very thankful for your help.
TIA
Nina