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what is that MAR-8 driver
Microwave Forum / Cellular Phone Jammers

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immy
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New PostCreated: 2004-09-01, 08:32 PM CET  Subject: Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
Farbenspiel
hi friend here is i fine easy circuit with LM741 do u think it will work if i apply 17 to 20V



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kleiner-onkel

Administrator

Messages: 412
Location: South-West-G
New PostCreated: 2004-09-01, 11:08 PM CET  Subject:  Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
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 ....!!



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immy
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New PostCreated: 2004-09-02, 12:04 AM CET  Subject:  Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
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
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kleiner-onkel

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Messages: 412
Location: South-West-G
New PostCreated: 2004-09-02, 12:09 AM CET  Subject:  Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
what ???



try this ....


http://www.carookee.com/forum/broadcasting/1/2606019#2606019
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immy
Guest
New PostCreated: 2004-09-02, 01:29 AM CET  Subject: Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
ok but may i still need inverting amplifier with a 741.
To doubble the output voltage
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immy
Guest
New PostCreated: 2004-09-02, 12:32 PM CET  Subject:  Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
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
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Gast
New PostCreated: 2004-09-02, 06:34 PM CET  Subject: Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
inverted, gain value coming in negative
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imgemini
Chef Clancy Wiggum


Messages: 39
New PostCreated: 2004-09-04, 01:02 PM CET  Subject: Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
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
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imgemini
Chef Clancy Wiggum


Messages: 39
New PostCreated: 2004-09-04, 05:19 PM CET  Subject: Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
hi here is the circuit
the is how i connect pos1060 with noise gen



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imgemini
Chef Clancy Wiggum


Messages: 39
New PostCreated: 2004-09-04, 05:30 PM CET  Subject: Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
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



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richy_64

Administrator

Messages: 198
New PostCreated: 2004-09-04, 07:58 PM CET  Subject: Re: what is that MAR-8 driver  print  recommend Reply with Quotation  
Blutige Rache: Wegners schwerste Fäl...
@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!



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