12-10-2013, 12:09 PM | #21 | |
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Re: Radio Static
Quote:
So I'd suspect either the generator or the voltage regulator. If you plug headphones directly into your CD player do you hear the static? Tom |
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12-10-2013, 09:52 PM | #22 | |
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Re: Radio Static
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12-11-2013, 01:22 AM | #23 |
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Re: Radio Static
See # 11. I have a choke on every wire and still the static.
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12-11-2013, 01:29 AM | #24 |
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Re: Radio Static
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12-11-2013, 02:20 AM | #25 | |
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Re: Radio Static
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The CD player and mp3 player don't pick up the static on their own with headphones attached. The static is being picked up by the amp even without either the CD player or mp3 player attached.
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12-11-2013, 02:22 AM | #26 |
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Re: Radio Static
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12-11-2013, 03:38 AM | #27 |
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Re: Radio Static
Old Henry:
In past posts you needed Generator attention,which you did fix! Did you have Radio static before the Generator problem? |
12-11-2013, 04:15 AM | #28 |
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Re: Radio Static
Old Henry, You say its only the amplifier that seems to pick up the static. Try this, Grab your roll of cooking silver foil and wrap the amp up all over with two or three layers. Trouble with amps like that they are domestic units and not built for cars and as such don't have anti static radio interference circuits built in. See how you go. Regards, Kevin.
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12-11-2013, 04:53 AM | #29 |
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Re: Radio Static
This may not make much sense, but my father bought a 47 Ford new. He ended up putting a ground wire from the hood to the body and that stopped his noise. The radio sounded great, but if you raised the hood all you heard was engine noise etc.
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12-11-2013, 10:53 AM | #30 |
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Re: Radio Static
Back when we all used non-resistance plug wires, often all it took to get rid of the ignition noise in the Ford radios was to tie a knot in the coil wire. There was also a black bakelite inline coil resistor that worked well if you didn't know about the knot trick. The coil wire was cut and the wire ends screwed into the resistor. ..B.
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12-11-2013, 11:09 AM | #31 |
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Re: Radio Static
You'll see some examples of shielded wire here, Radio Shack (or any electronics store) should also carry wire shielding as well as shielded wire.
http://www.belden.com/resourcecenter.../shielding.pdf Foil may work as well as mentioned before...noise could be picked up in the unit, or the wire..try the cheap route first! |
12-11-2013, 01:22 PM | #32 | |
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Re: Radio Static
Quote:
I would try a short circuit on the amplifier's input. From what you've said, the noise would probably still be there. In that case it is probably radiated electrical noise rather than noise conducted into the amplifier from the input. Shielding the amplifier by putting it into a grounded metal box might take care of the problem. Or to track down the noise source, since the amplifier, battery pack, and a small speaker or headphones would be portable, I'd move it around to see where the noise was strong. Various places inside the car around the dash as well as under the hood. That would help track down the source. |
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12-11-2013, 04:12 PM | #33 | |
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Re: Radio Static
Quote:
(I did get my amp gauge today so will be testing that which you have been helping me with.)
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12-11-2013, 04:57 PM | #34 | ||||
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Re: Radio Static
Quote:
I disconnected that wire to the speaker switch and plugged in headphones - still static. I unplugged the amp from the large "D" battery pack I made and hooked up just a small 9 volt battery as it came with - still static. All of this with nothing plugged into the amp input. Quote:
Quote:
Quote:
Here's a little video clip of the sound playing through the speaker as the engine is revved up. Same sound in the headphones. https://www.youtube.com/watch?v=SXzQv...ature=youtu.be
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12-11-2013, 05:01 PM | #35 | |
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Re: Radio Static
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Hood is grounded. The hood ornament light runs through that ground. Opened and shut the hood. No change. But, thanks anyway. I'm still desperate and bewildered enough to try anything.
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12-11-2013, 05:04 PM | #36 |
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Re: Radio Static
I've used this amp for several years with virtually none of the static I now have. It has come since I replaced the brushes and armature in the generator but not immediately after. If this gives any ideas for a cure let me know. I did put the condenser on the generator armature terminal grounded to the generator body as instructed. Didn't help.
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12-11-2013, 05:45 PM | #37 | |
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Re: Radio Static
Quote:
You could temporarily disconnect all wires from the generator, or remove the belt driving the generator. That will narrow it down to spark vs. generator. Tom |
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12-11-2013, 05:56 PM | #38 |
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Re: Radio Static
Old Henry>>>I'm still desperate and bewildered enough to try anything.>>>
Go to Amazon. Try a few other headphone amps. Jack E/NJ |
12-11-2013, 06:08 PM | #39 | |
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Re: Radio Static
Quote:
I had that thought too. Something may have gone bad in my amp and I just need a new one. It cost $100.00 so I'm a little hesitant to spring for a new one too quickly. All headphone amps are not created equal. The one I have is the most powerful one made at the time I bought it. Other weaker ones I tried were too weak to play the speaker loud enough.
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Prof. Henry (The Roaming Gnome) "It is good to have an end to journey toward; but it is the journey that matters, in the end.” *Ursula K. Le Guin in The Left Hand of Darkness Last edited by Old Henry; 12-11-2013 at 06:18 PM. |
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12-11-2013, 06:11 PM | #40 |
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Re: Radio Static
Short Video Clip of the static I'm struggling with for anyone willing to listen and opine: https://www.youtube.com/watch?v=SXzQv...ature=youtu.be
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