circuit problem

J

JoeyAndres

New Member

• Feb 1, 2008

• #1

If I connect the output of two reciever to a transistor, something happens that should not

 

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Nigel Goodwin

Super Moderator

Most Helpful Member

• Feb 1, 2008

• #2

Perhaps a diagram might help?.

 

blueroomelectronics

Well-Known Member

• Feb 1, 2008

• #3

JoeyAndres said:

If I connect the output of two reciever to a transistor, something happens that should not

Click to expand...

Ok tell us what happens that's not supposed to happen...

 

Krumlink

New Member

• Feb 1, 2008

• #4

Lol yah really

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Feb 2, 2008

• #5

Yeah, still no information, but the circuit doesn't look like it will work - a 741 isn't going to give you a gain of 1000 at 40KHz, and you seem seriously lacking in decoupling capacitors.

 

Hero999

Banned

• Feb 3, 2008

• #6

All ICs need 100nF across their supply pins and replace the crappy 741 with a TL081. The you stand some haf decent chance of it working..

 

J

JoeyAndres

New Member

• Feb 27, 2008

• #7

I only use 24khz, I only copied this schematic from the internet, I use a very high gain op-amp opa27, the current to voltage convertor resistor is 330ohms is replace by 1mohms, and the feedback resistor is also replace with 1M. Thanks for all of your reply, but I already solved my problem, I just replace the input capacitor 10000pf to 1000pf, to cut off half of the frequency.