With a Yaesu VX-5 powered from a Radio Shack car cord attached to the
console cigar lighter socket, I get rapidly repeating noise likened by
others to spark plug noise; but, no spark plugs on a diesel. Removing
the card cord and transmitting on battery eliminates the problem.

I'm about to switch from the VX-5 HT to a Kenwood TM-V7A; how may I
avoid this problem when installing the mobile transceiver.


Thank you in advance for your on-topic suggestions.

73s & best regards,

K7AAY

 

K7AAY wrote:
> With a Yaesu VX-5 powered from a Radio Shack car cord attached to the
> console cigar lighter socket, I get rapidly repeating noise likened by
> others to spark plug noise; but, no spark plugs on a diesel. Removing
> the card cord and transmitting on battery eliminates the problem.
>
> I'm about to switch from the VX-5 HT to a Kenwood TM-V7A; how may I
> avoid this problem when installing the mobile transceiver.
>
>
> Thank you in advance for your on-topic suggestions.
>
> 73s & best regards,
>
> K7AAY
>

Fuel injectors are the most likely source of the noise.

First, use a direct connection to the battery terminals. Second, twist the
connecting wires 2 or 3 twists per foot from the battery to your radio. Third,
get a GOOD chassis ground connection for the radio.

If noise persists talk with the CRD service techs regarding slightly slowing
down the rise time of the fuel injectors or adding a suppression diode across
the fuel injector coils [it is unlikely you will get any support in this area,
but worth a try]

 

K7AAY wrote:
> With a Yaesu VX-5 powered from a Radio Shack car cord attached to the
> console cigar lighter socket, I get rapidly repeating noise likened by
> others to spark plug noise; but, no spark plugs on a diesel. Removing
> the card cord and transmitting on battery eliminates the problem.
>
> I'm about to switch from the VX-5 HT to a Kenwood TM-V7A; how may I
> avoid this problem when installing the mobile transceiver.
>
>
> Thank you in advance for your on-topic suggestions.
>
> 73s & best regards,
>
> K7AAY
>

Fuel injectors are the most likely source of the noise.

First, use a direct connection to the battery terminals. Second, twist the
connecting wires 2 or 3 twists per foot from the battery to your radio. Third,
get a GOOD chassis ground connection for the radio.

If noise persists talk with the CRD service techs regarding slightly slowing
down the rise time of the fuel injectors or adding a suppression diode across
the fuel injector coils [it is unlikely you will get any support in this area,
but worth a try]

 

K7AAY wrote:
> With a Yaesu VX-5 powered from a Radio Shack car cord attached to the
> console cigar lighter socket, I get rapidly repeating noise likened by
> others to spark plug noise; but, no spark plugs on a diesel. Removing
> the card cord and transmitting on battery eliminates the problem.
>
> I'm about to switch from the VX-5 HT to a Kenwood TM-V7A; how may I
> avoid this problem when installing the mobile transceiver.
>
>
> Thank you in advance for your on-topic suggestions.
>
> 73s & best regards,
>
> K7AAY
>

Fuel injectors are the most likely source of the noise.

First, use a direct connection to the battery terminals. Second, twist the
connecting wires 2 or 3 twists per foot from the battery to your radio. Third,
get a GOOD chassis ground connection for the radio.

If noise persists talk with the CRD service techs regarding slightly slowing
down the rise time of the fuel injectors or adding a suppression diode across
the fuel injector coils [it is unlikely you will get any support in this area,
but worth a try]

 

If you contact DC, they might send you the booklet on installing a
transmitter into the vehicle. They get very specific on where the power
and grounds can be run as well as the antenna wire.

On GM's for instance, you have to have a 10 ga. dedicated fused power
and ground line to the battery run far away from any vehicle harnesses
to avoid voiding the vehicle warranty. Transmitters can interfere with
things like the ABS and transmission modules, like some TJ's will go
into neutral when the transmitter is keyed up, and any other electronic
part.

Here is a link to GM's instructions, I haven't found any online for
Jeeps:
http://service.gm.com/techlineinfo/radio.html

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

K7AAY wrote:
>
> With a Yaesu VX-5 powered from a Radio Shack car cord attached to the
> console cigar lighter socket, I get rapidly repeating noise likened by
> others to spark plug noise; but, no spark plugs on a diesel. Removing
> the card cord and transmitting on battery eliminates the problem.
>
> I'm about to switch from the VX-5 HT to a Kenwood TM-V7A; how may I
> avoid this problem when installing the mobile transceiver.
>
> Thank you in advance for your on-topic suggestions.
>
> 73s & best regards,
>
> K7AAY

 

If you contact DC, they might send you the booklet on installing a
transmitter into the vehicle. They get very specific on where the power
and grounds can be run as well as the antenna wire.

On GM's for instance, you have to have a 10 ga. dedicated fused power
and ground line to the battery run far away from any vehicle harnesses
to avoid voiding the vehicle warranty. Transmitters can interfere with
things like the ABS and transmission modules, like some TJ's will go
into neutral when the transmitter is keyed up, and any other electronic
part.

Here is a link to GM's instructions, I haven't found any online for
Jeeps:
http://service.gm.com/techlineinfo/radio.html

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

K7AAY wrote:
>
> With a Yaesu VX-5 powered from a Radio Shack car cord attached to the
> console cigar lighter socket, I get rapidly repeating noise likened by
> others to spark plug noise; but, no spark plugs on a diesel. Removing
> the card cord and transmitting on battery eliminates the problem.
>
> I'm about to switch from the VX-5 HT to a Kenwood TM-V7A; how may I
> avoid this problem when installing the mobile transceiver.
>
> Thank you in advance for your on-topic suggestions.
>
> 73s & best regards,
>
> K7AAY

 

If you contact DC, they might send you the booklet on installing a
transmitter into the vehicle. They get very specific on where the power
and grounds can be run as well as the antenna wire.

On GM's for instance, you have to have a 10 ga. dedicated fused power
and ground line to the battery run far away from any vehicle harnesses
to avoid voiding the vehicle warranty. Transmitters can interfere with
things like the ABS and transmission modules, like some TJ's will go
into neutral when the transmitter is keyed up, and any other electronic
part.

Here is a link to GM's instructions, I haven't found any online for
Jeeps:
http://service.gm.com/techlineinfo/radio.html

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

K7AAY wrote:
>
> With a Yaesu VX-5 powered from a Radio Shack car cord attached to the
> console cigar lighter socket, I get rapidly repeating noise likened by
> others to spark plug noise; but, no spark plugs on a diesel. Removing
> the card cord and transmitting on battery eliminates the problem.
>
> I'm about to switch from the VX-5 HT to a Kenwood TM-V7A; how may I
> avoid this problem when installing the mobile transceiver.
>
> Thank you in advance for your on-topic suggestions.
>
> 73s & best regards,
>
> K7AAY

 

Mike Romain wrote:
> If you contact DC, they might send you the booklet on installing a
> transmitter into the vehicle. They get very specific on where the power
> and grounds can be run as well as the antenna wire.
<snip>

Thank you for your on-topic reply!

I do have the equivalent for a 2006 Charger Police Edition, which may
be downloaded from the very last link at http://www.503bartley.com and
will look for a similar "outfitter's guide" for the Liberty.

 

Mike Romain wrote:
> If you contact DC, they might send you the booklet on installing a
> transmitter into the vehicle. They get very specific on where the power
> and grounds can be run as well as the antenna wire.
<snip>

Thank you for your on-topic reply!

I do have the equivalent for a 2006 Charger Police Edition, which may
be downloaded from the very last link at http://www.503bartley.com and
will look for a similar "outfitter's guide" for the Liberty.

 

Mike Romain wrote:
> If you contact DC, they might send you the booklet on installing a
> transmitter into the vehicle. They get very specific on where the power
> and grounds can be run as well as the antenna wire.
<snip>

Thank you for your on-topic reply!

I do have the equivalent for a 2006 Charger Police Edition, which may
be downloaded from the very last link at http://www.503bartley.com and
will look for a similar "outfitter's guide" for the Liberty.