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    Variable Capacitor

    Can someone please explain the leads of this variable capacitor and how to hook it up? I have never used one and I want to make sure I get this correct. Thanks -crivoli
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    Simple AM receiver

    My question is if I build this simple AM receiver and feed the output to the LM386 using a gain of 50, should the output to the speaker be good quality audio? I saw the datasheet for the LM386 and it shows an "AM Radio Power Amplifier" schematic, but can I use one of the other setups without...
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    audioguru, question on preamp/amp

    Question 1: I built the circuit on the LM386 datasheet with the amp at a gain = 20. Everything works fine. I then adjusted the gain to 50 and it works correctly. When I adjust the gain to 200 the speaker just squeals horribly. I have built this circuit before and used a gain of 200 with no...
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    FM Transmitter

    I have built this simple FM transmitter. http://www.uoguelph.ca/~antoon/circ/fmt1.htm I have attached a picture, sorry it isn't the best picture Is there any other way I can test this without trying to find the transmission on my radio? Thanks
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    Wireless Intercom

    I have built an intercom off of the simple 200 GAIN design specified on the datasheet of the LM386 IC. http://cache.national.com/ds/LM/LM386.pdf I have thoughts of trying to get this to be a wireless intercom. This would be for only one microphone to one speaker. I am not sure where to...
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    Audio Amp

    I have built the following circuit but the sound quality is terrible. Any ideas on how to make the sound quiality MUCH better? I am using an electret mic and an 8 ohm speaker.  Thanks
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    Electret Mic

    I am trying to build the following circuit: http://www.uoguelph.ca/~antoon/circ/amp2.htm I purchased the electret microphone at Radio Shack: http://www.radioshack.com/product/in...entPage=search This mic has 3 leads; Red, White and Ground. How do I hook up the 3 leads on this circuit...
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