am radio trouble
02-21-2017, 09:27 AM
#2
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Year: 2000
Model: Cherokee
Engine: 6 cylinder
Yep, i'd go with a new extension cable and take it from there. They're not that expensive. Its best not to use an extension cable though.
Theoretically, the length of the antenna cable should be calibrated to provide the best reception based on the length of the antenna mast at the desired radio frequency.
Similar to adjusting the SWR for a CB antenna for max transmit power and best receive reception.
Did you replace the radio recently? If so, did the original radio have the same issue?
Theoretically, the length of the antenna cable should be calibrated to provide the best reception based on the length of the antenna mast at the desired radio frequency.
Similar to adjusting the SWR for a CB antenna for max transmit power and best receive reception.
Did you replace the radio recently? If so, did the original radio have the same issue?
02-21-2017, 12:58 PM
#4
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Year: 2000
Model: Cherokee
Engine: 6 cylinder
The radio is stuck? How? The plot thickens!
If it were my deal, i'd remove the radio by hook or crook to see whats really going on.
Could be something as simple as corrosion on the cable connector(s), corrosion on the radio antenna jack or loose cable connectors causing the problem.
By the way, if the radio is not grounded properly that can cause all kinds of reception issues especially for AM. Make sure its got a good ground. Who ever installed the radio might of not grounded its chassis.
Of course there's the remote possibility the radio or even the antenna could be bad also.
Yes a pinched cable could cause problems. The ground cable shield and the diameter of the inner insulator if damaged can affect RF transmission at given frequency.
If that cramped for space, they do make extensions with a 90 deg. connector at one end.
If it were my deal, i'd remove the radio by hook or crook to see whats really going on.
Could be something as simple as corrosion on the cable connector(s), corrosion on the radio antenna jack or loose cable connectors causing the problem.
By the way, if the radio is not grounded properly that can cause all kinds of reception issues especially for AM. Make sure its got a good ground. Who ever installed the radio might of not grounded its chassis.
Of course there's the remote possibility the radio or even the antenna could be bad also.
Yes a pinched cable could cause problems. The ground cable shield and the diameter of the inner insulator if damaged can affect RF transmission at given frequency.
If that cramped for space, they do make extensions with a 90 deg. connector at one end.
02-21-2017, 06:36 PM
#6
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Year: 2000
Model: Cherokee
Engine: 6 cylinder
Does the radio have a ground wire connected to its case?
Please answer that or i'm out of this thread!
If its not there, then the radio is relying on other poor grounds to operate.
The antenna cable shielding and the radio itself requires a good solid ground to operate properly.
Do you hear ignition noise when listening to AM?
AM (Amplitude Modulation) because of its type of modulation and low RF frequency is more prone to noise than FM (Frequency Modulation).
Please answer that or i'm out of this thread!
If its not there, then the radio is relying on other poor grounds to operate.
The antenna cable shielding and the radio itself requires a good solid ground to operate properly.
Do you hear ignition noise when listening to AM?
AM (Amplitude Modulation) because of its type of modulation and low RF frequency is more prone to noise than FM (Frequency Modulation).
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02-22-2017, 07:02 PM
#8
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Year: 2000
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I was going to mention a trim pot but i don't think they exist anymore. Some of the older car radios had them built in.
Thats why i suggested to ditch the extension if possible. On one of my vehicles i've got one of those 'hidden CB adapters' which allows the stock antenna to transmit/receive CB, FM and AM. Works OK.
It has an AM adjustment or as you call it a trim pot for the best AM reception.
Basically what it does for a better lack of words is it re-calibrates the antenna cable length same as adjusting the SWR for a CB radio but for AM reception.
Good luck whenever you pick up your new radio! Never liked Sony audio.
Thats why i suggested to ditch the extension if possible. On one of my vehicles i've got one of those 'hidden CB adapters' which allows the stock antenna to transmit/receive CB, FM and AM. Works OK.
It has an AM adjustment or as you call it a trim pot for the best AM reception.
Basically what it does for a better lack of words is it re-calibrates the antenna cable length same as adjusting the SWR for a CB radio but for AM reception.
Good luck whenever you pick up your new radio! Never liked Sony audio.
