Copper Talk » Open Forum » Archived Messages » 2002 » Archived Messages 05/01/2002 to 06/30/2002 » Engine sounds in the radio « Previous Next »

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jss
Posted on Monday, June 24, 2002 - 8:41 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Just purchased a new Midland and for the first time I ran it to the battery. Used a cig. adapter before with other radios. Any how, I am receiving some serious static from the engine; however, when I turn the car off, reception is very clear. I'm about to go back to the cig. adapter. Any suggestions?
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307
Posted on Tuesday, June 25, 2002 - 6:53 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Radio Shack.."Hot Line Filter"

307
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Dx431
Posted on Tuesday, June 25, 2002 - 9:19 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
What kinda car is it and what AWG wire are you using? You may need to use heavier wire and or a good noise filter.
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bullet/151 southern Indiana
Posted on Wednesday, June 26, 2002 - 11:45 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
filter capacitor the higher the farad value
the better it will filter out the noise.

i use a 1 farad cap inline with the power cord from the battery to feed all radio equipment and get 0 vehical noise.
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DeadlyEyes
Posted on Thursday, June 27, 2002 - 1:34 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
What kind of noises. High pitch variable whine. Or is it more like a popping sound.
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DeadlyEyes
Posted on Thursday, June 27, 2002 - 1:37 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
Woa back up there bullet....

You used one whole farad?????? A farad is a pretty large value. Don't you mean the valuation should be in the Mf or Pf.
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bullet/151 southern Indiana
Posted on Friday, June 28, 2002 - 2:00 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)
no i said it right 1 farad.

i use a 1 farad stiffening capacitor the same one the car sterio guy's use in their high performance car audio systems. ive found it to serve a dual purpose.
1st it works great for filtering electrical noises "i drive a ford truck enuff said"lol. 2nd it works great for instant supply of power for the radio-n-amplifier system just as it was designed for in car audio.

.5 farade is good for a 500 watt system 1 farad for a 1000 watts 2 for 2000 ect. i could run 2 farads caps with my amp but i dont use it enuff anymore to warant doing so.
inside my 2950's i install a 4700mf 35volt cap at the dc power inlet to the rig to help filter as well.