"OU97CPA" <ou97cpa@gmail.com> wrote in
news:1152716405.294139.99190@s13g2000cwa.googlegro ups.com:

>
> Bob wrote:
>> "OU97CPA" <ou97cpa@gmail.com> wrote in message
>> news:1152635322.035429.52810@b28g2000cwb.googlegro ups.com...
>> > hyundaitech wrote:
>> >> This isn't really my area of expertise, but any antenna amps I've
>> >> seen go inline with the antenna wire. There isn't anything like
>> >> this on the vehicle-- you'd have to purchase something and
>> >> install.
>> >
>> > Thanks for the info! Do you know where I can view/download the pin
>> > diagram for the factory harness? The only ones I've been able to
>> > locate are for aftermarket harnesses, which omit the wires that the
>> > harnesses omit. I'm just curious what the 2 other wires on the
>> > factory harness are for.
>> >
>> > Thanks
>>
>> The one that was on pin 24 - I think it's G/B, but I can't read it
>> for sure - is for the antenna amp. It needs 12 volts when the radio
>> is on. If the amp's not powered, it's likely that the only thing
>> you'll hear is what leaks through the amp, and cable. VHF (FM) is
>> able to do that more easily than HF (AM).
>
> Pin 24 it is. Connected it to the wire from my head unit, and I have
> radio again! Thanks for the help
>

Let me ask you guys something, since you seem to know your radios and
wiring. I have Sirius radio. I can use it fine with my FM modulator,
but as you probably know, the sound is much less than CD quality. On my
(now traded in) Elantra, I used an in-line antenna adapter to pipe in
the Sirius. Although it still relied on a FM modulator, the sound was
much better - almost CD quality.

When I got rid of the Elantra I removed the antenna adapter and tried to
install it in my Sonata. With it in place, I had great sounding Sirius,
but my AM reception was almost nothing, and my FM was very poor.

Removing the adapter fixed that problem and I have left it alone ever
since.

Could the adapter interfere with the built-in antenna amp? Is there any
way around that?

Thanks for any help you can provide. I am thinking maybe this is some
kind of grounding issue, but I tried a few things with no success. Of
course, I wasn't aware of the antenna amp to begin with.

Eric

 

It could be interfering with the proper passage of the signal along the
antenna wire. I'd think it'd need a built-in amp or some sort of
pass-thru switch to prevent lack of reception.

 

It could be interfering with the proper passage of the signal along the
antenna wire. I'd think it'd need a built-in amp or some sort of
pass-thru switch to prevent lack of reception.

 

It could be interfering with the proper passage of the signal along the
antenna wire. I'd think it'd need a built-in amp or some sort of
pass-thru switch to prevent lack of reception.

 

"hyundaitech" <notpublic@not.public.com> wrote in
news:fa659cb645c76da701cf9b5cbf06c090@localhost.ta lkaboutautos.com:

> It could be interfering with the proper passage of the signal along the
> antenna wire. I'd think it'd need a built-in amp or some sort of
> pass-thru switch to prevent lack of reception.

It is a pass-through switch. It worked just fine on the Elantra without
losing any reception. That is what really has me confused.

Eric

 

"hyundaitech" <notpublic@not.public.com> wrote in
news:fa659cb645c76da701cf9b5cbf06c090@localhost.ta lkaboutautos.com:

> It could be interfering with the proper passage of the signal along the
> antenna wire. I'd think it'd need a built-in amp or some sort of
> pass-thru switch to prevent lack of reception.

It is a pass-through switch. It worked just fine on the Elantra without
losing any reception. That is what really has me confused.

Eric

 

"hyundaitech" <notpublic@not.public.com> wrote in
news:fa659cb645c76da701cf9b5cbf06c090@localhost.ta lkaboutautos.com:

> It could be interfering with the proper passage of the signal along the
> antenna wire. I'd think it'd need a built-in amp or some sort of
> pass-thru switch to prevent lack of reception.

It is a pass-through switch. It worked just fine on the Elantra without
losing any reception. That is what really has me confused.

Eric

 

"Eric G." <NgOrSePeAnM99@Zoptonline.Znet> wrote in message
news:Xns97FECAE187C83Xz124HiiUdfEEE6@140.99.99.130 ...
> "hyundaitech" <notpublic@not.public.com> wrote in
> news:fa659cb645c76da701cf9b5cbf06c090@localhost.ta lkaboutautos.com:
>
>> It could be interfering with the proper passage of the signal along the
>> antenna wire. I'd think it'd need a built-in amp or some sort of
>> pass-thru switch to prevent lack of reception.
>
> It is a pass-through switch. It worked just fine on the Elantra without
> losing any reception. That is what really has me confused.
>
> Eric
>
There may be a voltage on the center conductor which provides either AM/FM
switching to the amp module near the back window (according to the
schematic, there is an AM and FM antenna section). This is unlikely, as
someone else here just replaced their radio with an aftermarket one, and I'm
sure that does not provide a bias voltage. The switch for the modulator is
likely cap. coupled which would block that voltage (if present). Measure
from ground to the center pin from the radio.

More likely is that either the switch isn't working - kill the power to the
Sirius receiver, and see if there's any difference in reception on a sort of
receivable FM station - NOT the channel Sirius is transmitting on - when the
Sirius receiver is turned on. If not, the switch, or the switching output
from the Sirius receiver is broken. If it gets worse when the Sirius
receiver is on, and better, but not good when it's off, it's probably a
problem with the cable between the switch and the car radio - assuming the
tail from the switch is the side the car radio belongs on, and the "hole" in
the switch is where the car radio antenna goes. The modulator from the
Sirius is probably hot enough that the car radio can hear it, even if the
cable is bad.

 

"Eric G." <NgOrSePeAnM99@Zoptonline.Znet> wrote in message
news:Xns97FECAE187C83Xz124HiiUdfEEE6@140.99.99.130 ...
> "hyundaitech" <notpublic@not.public.com> wrote in
> news:fa659cb645c76da701cf9b5cbf06c090@localhost.ta lkaboutautos.com:
>
>> It could be interfering with the proper passage of the signal along the
>> antenna wire. I'd think it'd need a built-in amp or some sort of
>> pass-thru switch to prevent lack of reception.
>
> It is a pass-through switch. It worked just fine on the Elantra without
> losing any reception. That is what really has me confused.
>
> Eric
>
There may be a voltage on the center conductor which provides either AM/FM
switching to the amp module near the back window (according to the
schematic, there is an AM and FM antenna section). This is unlikely, as
someone else here just replaced their radio with an aftermarket one, and I'm
sure that does not provide a bias voltage. The switch for the modulator is
likely cap. coupled which would block that voltage (if present). Measure
from ground to the center pin from the radio.

More likely is that either the switch isn't working - kill the power to the
Sirius receiver, and see if there's any difference in reception on a sort of
receivable FM station - NOT the channel Sirius is transmitting on - when the
Sirius receiver is turned on. If not, the switch, or the switching output
from the Sirius receiver is broken. If it gets worse when the Sirius
receiver is on, and better, but not good when it's off, it's probably a
problem with the cable between the switch and the car radio - assuming the
tail from the switch is the side the car radio belongs on, and the "hole" in
the switch is where the car radio antenna goes. The modulator from the
Sirius is probably hot enough that the car radio can hear it, even if the
cable is bad.

 

"Eric G." <NgOrSePeAnM99@Zoptonline.Znet> wrote in message
news:Xns97FECAE187C83Xz124HiiUdfEEE6@140.99.99.130 ...
> "hyundaitech" <notpublic@not.public.com> wrote in
> news:fa659cb645c76da701cf9b5cbf06c090@localhost.ta lkaboutautos.com:
>
>> It could be interfering with the proper passage of the signal along the
>> antenna wire. I'd think it'd need a built-in amp or some sort of
>> pass-thru switch to prevent lack of reception.
>
> It is a pass-through switch. It worked just fine on the Elantra without
> losing any reception. That is what really has me confused.
>
> Eric
>
There may be a voltage on the center conductor which provides either AM/FM
switching to the amp module near the back window (according to the
schematic, there is an AM and FM antenna section). This is unlikely, as
someone else here just replaced their radio with an aftermarket one, and I'm
sure that does not provide a bias voltage. The switch for the modulator is
likely cap. coupled which would block that voltage (if present). Measure
from ground to the center pin from the radio.

More likely is that either the switch isn't working - kill the power to the
Sirius receiver, and see if there's any difference in reception on a sort of
receivable FM station - NOT the channel Sirius is transmitting on - when the
Sirius receiver is turned on. If not, the switch, or the switching output
from the Sirius receiver is broken. If it gets worse when the Sirius
receiver is on, and better, but not good when it's off, it's probably a
problem with the cable between the switch and the car radio - assuming the
tail from the switch is the side the car radio belongs on, and the "hole" in
the switch is where the car radio antenna goes. The modulator from the
Sirius is probably hot enough that the car radio can hear it, even if the
cable is bad.

 

"Bob" <bobsjunkmail@bellsouth.net> wrote in
newspgtg.45786$EX2.22653@bignews5.bellsouth.net:

>
> "Eric G." <NgOrSePeAnM99@Zoptonline.Znet> wrote in message
> news:Xns97FECAE187C83Xz124HiiUdfEEE6@140.99.99.130 ...
>> "hyundaitech" <notpublic@not.public.com> wrote in
>> news:fa659cb645c76da701cf9b5cbf06c090@localhost.ta lkaboutautos.com:
>>
>>> It could be interfering with the proper passage of the signal along
>>> the antenna wire. I'd think it'd need a built-in amp or some sort
>>> of pass-thru switch to prevent lack of reception.
>>
>> It is a pass-through switch. It worked just fine on the Elantra
>> without losing any reception. That is what really has me confused.
>>
>> Eric
>>
> There may be a voltage on the center conductor which provides either
> AM/FM switching to the amp module near the back window (according to
> the schematic, there is an AM and FM antenna section). This is
> unlikely, as someone else here just replaced their radio with an
> aftermarket one, and I'm sure that does not provide a bias voltage.
> The switch for the modulator is likely cap. coupled which would block
> that voltage (if present). Measure from ground to the center pin from
> the radio.
>
> More likely is that either the switch isn't working - kill the power
> to the Sirius receiver, and see if there's any difference in reception
> on a sort of receivable FM station - NOT the channel Sirius is
> transmitting on - when the Sirius receiver is turned on. If not, the
> switch, or the switching output from the Sirius receiver is broken. If
> it gets worse when the Sirius receiver is on, and better, but not good
> when it's off, it's probably a problem with the cable between the
> switch and the car radio - assuming the tail from the switch is the
> side the car radio belongs on, and the "hole" in the switch is where
> the car radio antenna goes. The modulator from the Sirius is probably
> hot enough that the car radio can hear it, even if the cable is bad.

I tested for voltage and have none (well, it actually shows 1 mV but I
think my meter is just out of calibration). The adapter gives me the
same reception on all AM/FM stations with or without the Sirius radio
connected. Also, if it is connected, power on or off makes no
difference. Yet I tested it all out on my Entourage, which I believe
hasd the same antenna, and it worked fine. Weird.

Eric

 

"Bob" <bobsjunkmail@bellsouth.net> wrote in
newspgtg.45786$EX2.22653@bignews5.bellsouth.net:

>
> "Eric G." <NgOrSePeAnM99@Zoptonline.Znet> wrote in message
> news:Xns97FECAE187C83Xz124HiiUdfEEE6@140.99.99.130 ...
>> "hyundaitech" <notpublic@not.public.com> wrote in
>> news:fa659cb645c76da701cf9b5cbf06c090@localhost.ta lkaboutautos.com:
>>
>>> It could be interfering with the proper passage of the signal along
>>> the antenna wire. I'd think it'd need a built-in amp or some sort
>>> of pass-thru switch to prevent lack of reception.
>>
>> It is a pass-through switch. It worked just fine on the Elantra
>> without losing any reception. That is what really has me confused.
>>
>> Eric
>>
> There may be a voltage on the center conductor which provides either
> AM/FM switching to the amp module near the back window (according to
> the schematic, there is an AM and FM antenna section). This is
> unlikely, as someone else here just replaced their radio with an
> aftermarket one, and I'm sure that does not provide a bias voltage.
> The switch for the modulator is likely cap. coupled which would block
> that voltage (if present). Measure from ground to the center pin from
> the radio.
>
> More likely is that either the switch isn't working - kill the power
> to the Sirius receiver, and see if there's any difference in reception
> on a sort of receivable FM station - NOT the channel Sirius is
> transmitting on - when the Sirius receiver is turned on. If not, the
> switch, or the switching output from the Sirius receiver is broken. If
> it gets worse when the Sirius receiver is on, and better, but not good
> when it's off, it's probably a problem with the cable between the
> switch and the car radio - assuming the tail from the switch is the
> side the car radio belongs on, and the "hole" in the switch is where
> the car radio antenna goes. The modulator from the Sirius is probably
> hot enough that the car radio can hear it, even if the cable is bad.

I tested for voltage and have none (well, it actually shows 1 mV but I
think my meter is just out of calibration). The adapter gives me the
same reception on all AM/FM stations with or without the Sirius radio
connected. Also, if it is connected, power on or off makes no
difference. Yet I tested it all out on my Entourage, which I believe
hasd the same antenna, and it worked fine. Weird.

Eric

 

"Bob" <bobsjunkmail@bellsouth.net> wrote in
newspgtg.45786$EX2.22653@bignews5.bellsouth.net:

>
> "Eric G." <NgOrSePeAnM99@Zoptonline.Znet> wrote in message
> news:Xns97FECAE187C83Xz124HiiUdfEEE6@140.99.99.130 ...
>> "hyundaitech" <notpublic@not.public.com> wrote in
>> news:fa659cb645c76da701cf9b5cbf06c090@localhost.ta lkaboutautos.com:
>>
>>> It could be interfering with the proper passage of the signal along
>>> the antenna wire. I'd think it'd need a built-in amp or some sort
>>> of pass-thru switch to prevent lack of reception.
>>
>> It is a pass-through switch. It worked just fine on the Elantra
>> without losing any reception. That is what really has me confused.
>>
>> Eric
>>
> There may be a voltage on the center conductor which provides either
> AM/FM switching to the amp module near the back window (according to
> the schematic, there is an AM and FM antenna section). This is
> unlikely, as someone else here just replaced their radio with an
> aftermarket one, and I'm sure that does not provide a bias voltage.
> The switch for the modulator is likely cap. coupled which would block
> that voltage (if present). Measure from ground to the center pin from
> the radio.
>
> More likely is that either the switch isn't working - kill the power
> to the Sirius receiver, and see if there's any difference in reception
> on a sort of receivable FM station - NOT the channel Sirius is
> transmitting on - when the Sirius receiver is turned on. If not, the
> switch, or the switching output from the Sirius receiver is broken. If
> it gets worse when the Sirius receiver is on, and better, but not good
> when it's off, it's probably a problem with the cable between the
> switch and the car radio - assuming the tail from the switch is the
> side the car radio belongs on, and the "hole" in the switch is where
> the car radio antenna goes. The modulator from the Sirius is probably
> hot enough that the car radio can hear it, even if the cable is bad.

I tested for voltage and have none (well, it actually shows 1 mV but I
think my meter is just out of calibration). The adapter gives me the
same reception on all AM/FM stations with or without the Sirius radio
connected. Also, if it is connected, power on or off makes no
difference. Yet I tested it all out on my Entourage, which I believe
hasd the same antenna, and it worked fine. Weird.

Eric