Some of you Telco guys know what a "banana" is... a tone sniffer that works right through wire insulation to id phone pairs (typical) with a tone generator "wobbler" on one end.
It's pretty much an lm-386 type circuit in some models with a high gain voltage probe sniffer circuit on the front end. In many cases the voltage probe sniffer circuit is just a fet stage. It hears almost anything close range... so you don't have to buy the Opto Electronics Near-field Receiver. Save your money for an extra Dayton Braut... cheers, s. > DCFluX <[EMAIL PROTECTED]> wrote: > > Point of order: > > Depending on the make and design of your amplifier, Make sure the > input to the LM-386 is not left 'floating'. Other wise the amp makes > one of the nicest broad-band AM recievers you can get. > > A 10K pull low resistor is all it takes. Also a 470pF capacitor > to ground will help in high RF enviroments. >
