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| How to Modify the Stock Fiero Radio for MP3 Players, With Pics. (Page 3/7) |
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watts
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MAY 11, 10:36 PM
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MIGHT not be an issue, but you possibly will want to use shielded cable (something like you'd find used for your headphones) to run from the jack, to the audio input stage of the amp.
This will reduce the chances of any interference/hum being picked up from the various components your wire will probably have to run near.
No point in going to all that trouble just to have it sound crappy! 
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fierohoho
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MAY 11, 10:38 PM
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Ok, I had time this evening what with work and being a little under the weather to
go out and locate and get a pic of the L & R on the Amp board.
My last pic was correct for the taped ribbon of wires that hold the L & R wires.
This pic is from the other side of the board and I have labled it and put a red tracer on the L & R wires,
you can easily see the L & R on the board, OK I used a magnifying glass but I could at least see it then.
Next question for Jax184, if I read your post right the 1/8" stereo plug is set up this way and I would
guess this is universal to all stereo equipment.
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fierohoho
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MAY 11, 10:58 PM
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Well I just used the OHM meter to figure out my jack so I labled the pic and here it is.
That's "if" I got the diagram on the 1/8" plug correct.
If so I will next add the wires and figure out where I can mount it on the radio.[This message has been edited by fierohoho (edited 05-11-2006).]
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Jax184
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MAY 11, 11:07 PM
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That's all correct.
As for the shielding, you'll notice the rest of the stereo's wires arnt shielded. I never noticed any noise problems myself, but my stock speakers sound as though they've been knitted...
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texasfiero
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MAY 11, 11:15 PM
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Trivia. Ever heard of "tip and ring" from telephone terminology.
From Wikipedia:
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fierohoho
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MAY 12, 12:26 AM
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| quote | Originally posted by Jax184:
stock speakers sound as though they've been knitted... |
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LOL
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Scurvy
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MAY 12, 01:05 PM
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the 5 dollar radio shack tape adapter still works fine for me.
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Soelasca
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MAY 12, 09:16 PM
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Can you show a picture of you actually doing the soldering/unsoldering?
I have no experience at small electrical board soldering. I can solder wires, pipe, cast iron....etc...you name it. But I have never soldered something this small. I would be a little leery of burning the whole board up. I'd like to see if there's any special soldering iron/gun you use.
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Jax184
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MAY 12, 11:31 PM
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You use a pencil-type soldering iron of roughly 25 watts. Like http://www.allerc.com/images/Pictures/SOLDERIRON.jpg if you've never seen one.
The finer the tip the better for this. You also use very fine solder. Again if you don't feel that you can safely do it, I could do it for you.
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Ratfart
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MAY 12, 11:55 PM
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Has anyone looked into the what the original signal level is at the point the aux jack is being wired into?
I wonder if it is a low level signal and if the mp3 player would be overdriving it.
What about impedance matching? Is the Pontiac amp section a voltage controlled device or does it require some current?
I don't think it would have a FET front end in the 1980s' but I don't know. Just thinking.....
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