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Frightening the yaks, PowerHouse Communications just had to say:
Interesting article... One little warning to note with some (if not all) Uniden Bearcat portable scanners, and maybe others... The earphone jack is directly fed full power audio, and is then reduced via a resistor place on the ground line of the earphone jack. Using this item, wired as indicated, would bypass the resistor (audio grounding would go through the unrestricted antenna ground) allowing full power audio out of the earphone jack once again. Audio output would be quite a bit higher than you would normally be used to! Be careful as to not damage your hearing because of this! That little trick (jumpering the audio ground to the antenna connector) is commonly used by those that hook up small external speaker(s) to the headphone jack... If that turned out to be the case, the project might work just as well with the connection to the antenna ground omitted. Depending on the RF impedance of the earphone, the whole thing is close to ground potential anyway. The audio limiting resistor inside the unit could only help lift that level. -- To reply, DO NOT remove spam from the return address! *************************** This calls for a careful blend of clever psychology and extreme violence. *************************** |
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