Loud cooling fan noise
 

I have a Uniden PC122 in a '92 Nissan Sentra. When the electric fans kick
on, there is enough noise to cover up the low signals. I have tried running
power from the fuse box and the battery. The power ground is only a foot
long or so. The chassis is grounded next to the radio. The antenna is on the
trunk and has an SWR of 1.05:1 on channel 28 and isn't higher than 1.2:1 on
any channel. Transmit and receive are what they should be other than the
noise. I'm thinking I should try capacitors in the fan motor?

Chris

I have a Uniden PC122 in a '92 Nissan Sentra. When the electric fans kick
on, there is enough noise to cover up the low signals. I have tried
running
power from the fuse box and the battery. The power ground is only a foot
long or so. The chassis is grounded next to the radio. The antenna is on
the
trunk and has an SWR of 1.05:1 on channel 28 and isn't higher than 1.2:1
on
any channel. Transmit and receive are what they should be other than the
noise. I'm thinking I should try capacitors in the fan motor?

I've got one fan with caps across the motor, a toroid inductor AND quite
a few wraps around a snap together ferrite core. This was good for CB
and 800 MHz. It's still damn strong on 146 MHz and 446 Mhz.

The antenna is on the trunk and has an SWR of 1.05:1 on channel 28 and
isn't higher than 1.2:1 on

Is your antenna mag-mount or proper mount? Trunk hinges are not good RF
grounds. Get some braid
and connect the sides of the hinge together. Just drill a hole and mount it
right if you're mag-mount.