Hi Friends,
I am starting a simple RF Transmitter project. I have basic knowledge of electronics. While simulating it on LTspice, I was unable to adjust the output frequency of this transmitter. I want at least 1wattage output from this circuit. I need help to fix this issues. Please advice me. I have attached a screen shot of LT Spice with Circuit Diagram.
I have uploaded all npn transistor model for LTspice. Please download here. 2N5551 is used for final stage amplifier. I already tried many times changing the value of L5. Please try once again with this model.
What you sent is the "picture" of a NPN transistor.
I need the other NPN file that gives the data from the data sheet.
Some how you have the numbers for the transistor and I don't.
Once I had made a 'MOD-4 FM transmitter' designed by audioguru. I am seeing the 1st and 2nd stage is exactly as audioguru's MOD 4. Probably he is using his design as an oscillator and booster. Then used another RF amplifier for greater range.
If it is true then audioguru says (about MOD4) the oscillator has 7805 for frequency stability, RF booster has 9V because the transistor will burn at 12V. And at last the OP added a last stage is for maximum power from the amplifier with 12V standerd supply.
I have uploaded all npn transistor model for LTspice. Please download here. 2N5551 is used for final stage amplifier. I already tried many times changing the value of L5. Please try once again with this model.
Hi Gurubhai,
Ron said you just uploaded an picture file. Please go to C: Program files\LTC\lib\cmp folder and take a blue color file something like named: 'BJT' and upload it here.