mstechca
New Member
OMG!
Good news and bad news for me.
The good news is that I can make any sort of transmitter.
The bad news is that it is transmitting on frequencies I dont want it to transmit on!
and whoever invented 1/(2*pi*sqr(L*C)) should go back to the drawing board because it doesn't work for me in all cases.
The following is the circuit I used. (see picture)
I find that if I use the capacitor between base and ground, then I am able to fine tune the transmitter until the receiver picks up the signal clearly.
BUT, I have tried the following, and it interfers with TV station #12 and yet, the station is local!
I tried removing the base-ground capacitor.
I tried increasing the capacitance in the tank circuit further.
I even tried increasing the resistor to 50K and decreasing the cap from base to +ve to 680pF.
I'm trying to transmit audio from my computer.
my computer alone causes no interference.
Good news and bad news for me.
The good news is that I can make any sort of transmitter.
The bad news is that it is transmitting on frequencies I dont want it to transmit on!
and whoever invented 1/(2*pi*sqr(L*C)) should go back to the drawing board because it doesn't work for me in all cases.
The following is the circuit I used. (see picture)
I find that if I use the capacitor between base and ground, then I am able to fine tune the transmitter until the receiver picks up the signal clearly.
BUT, I have tried the following, and it interfers with TV station #12 and yet, the station is local!
I tried removing the base-ground capacitor.
I tried increasing the capacitance in the tank circuit further.
I even tried increasing the resistor to 50K and decreasing the cap from base to +ve to 680pF.
I'm trying to transmit audio from my computer.
my computer alone causes no interference.