Re: what is that MAR-8 driver
hi friend here is i fine easy circuit with LM741 do u think it will work if i apply 17 to 20V 
Re: what is that MAR-8 driver
that don't work...
build a inverting amplifier with a 741.
To doubble the output voltage you need ...
Rk = (Ua / Ue -1) * Rq
Ua = 20V
Ue = 10V
Rq = 5K
so Rk is 5k
turn the output supply around ....!!
Re: what is that MAR-8 driver
what about recevier.....is my recevier will work to see tune VCO
thxs for inverting amplifier i will try it today with 555 square wave cricuit
Re: what is that MAR-8 driver
what ???
try this .... 
https://www.carookee.com/forum/broadcasting/1/2606019#2606019
Re: what is that MAR-8 driver
ok but may i still need inverting amplifier with a 741.
To doubble the output voltage
Re: what is that MAR-8 driver
hi friends
my brother i am in problem and you are the only one can help me i guess . i have to submit my project .. celluer phone jammer for security . i have POS1060 and PF1040........all the problem if from that noise or square wave genrator.......i alrady try 8 diiffernet circuits ...i just spend 6 hur in collage Lab to see this new circuit that u posted....
plesae friend help me as such as u can by come up with something that work .... your every word is very thing for me ....plesae help me to finish this project .......
just this problem making my life diffcult that no square wave or noise genrator is 17 to 23 V suppot...... i hope your this noise-gen with work ..but the out will be smaller then we need ....ok i will use this 741......
plesae help me as much as u can on this .......
german,s are the the best
Re: what is that MAR-8 driver
inverted, gain value coming in negative
Re: what is that MAR-8 driver
Hi
Please see what is wrong
Today I tune VCO to 13V dc noise and 10 V Vcc to jamme AMPS and GND pin 7 and POS1060 show all other also connected to GND(mean I just GND pin 7) not other so anthing is coming in output IN DC
..what u think what is wrong with this
please replay
Re: what is that MAR-8 driver
hi here is the circuit
the is how i connect pos1060 with noise gen
Re: what is that MAR-8 driver
and here is the noise circuit that i coonnect with POS1060
but anthing on the ouput
noise -gen= 13.5 V DC
Vcc=10vdc
output = anthing
Re: what is that MAR-8 driver
@immy, i would change your circuit like this.
What is the oscillators frequency? Change C1 to get 10-20kHz.
I think some nF will be suitable for this.
Use an oscilloscope to measure at the output. Now you can adjust the waveform you want...
For example: To get a signal from 17-23V, set the "DC Offset"-resistor to get 20V, then turn the "Noise Amplitude"-resistor to get 17-23V.
It will work!
