| Author |
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rdavisson
| | Posted on Tuesday, July 16, 2002 - 8:33 pm: | 
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Here is a question I've not seen addressed and I"ve tried to read a number of questions on the forum. I listen to the CB while driving with the family on trips. I plug in one of those single earpieces (cost around $8.00) you can buy at a truck stop into the external speaker jack so the rest of the family doesn't have to listen to it.
The downside to this is that any and all electronic noises come into the earpiece at a magnified level it seems, especially when I have the lights on at night.
Two questions:
1. What radio at a cost of $250 or less excels at squelching the extra noise that comes thru the speaker jack?
2. Does anybody know of an excellent earpiece that filters that noise out as well?
Any and all responses will be appreciated. thanks |
Insider
| | Posted on Wednesday, July 17, 2002 - 8:16 pm: |
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Have you already tried adding a noise filter to the power line going into the radio? If not, Go to Rat Shack and get one that'll handle the current draw of your radio. You could also try in place of or in addition to the filter adding one of the snap on chokes to the line cord.
Honestly, I never cared much for these tiny ear bud earphones, especially the piezo ones. I find they exaggerate the high frequencies too much. Try using an ordinary set of earbuds, designed for music. The frequency response is much better than those piezo types and may make the noise less noticable. |
2600
| | Posted on Thursday, July 18, 2002 - 3:06 pm: |
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If you look inside the average home stereo receiver, the headphone jack has a 220 ohm (or so) resistor in each channel. This is because a loudspeaker is far less sensitive than a headphone. If you place your ear right up against the speaker on a stereo, you will hear a small amount of 'hiss' noise. The headphone is just a speaker that is RIGHT THERE, up against your ear. If you have a way to insert a resistor in line with the earphone, you will find the volume control setting is nearer where you set it for normal speaker volume, and the residual noises are much reduced. If you don't plan to use the external jack for a speaker, the resistor can be put inside the radio, in line with the 'tip' lug of the external speaker jack. Once you do that, an external SPEAKER will no longer work right.
73 |
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