Help with some noise

[aschenavar]

Hi all, I just installed my TK-790H setup in my new truck, 2013 F-150. Transferred the setup from an 08 Wrangler and had zero issues on that vehicle. Today I was told while on a repeater channel that I have what sounds to be wind noise while TX and an occasional drop off, and a small amount of static on RX. I have the power ran to battery, fused approx 6" off the battery, grounded to a rear seat bolt, antenna is mounted in the roof. I wasn't feeling real confident with this ground and I'm really wondering if that could be the issue. The only thing I have done differently between the vehicles is switch from a 5/8w to a 1/4w antenna.

I plan to change the ground out when I get off work but it's racking my brain in the mean time. Thanks!

 

[Guillaumet]

Hi all, I just installed my TK-790H setup in my new truck, 2013 F-150. Transferred the setup from an 08 Wrangler and had zero issues on that vehicle. Today I was told while on a repeater channel that I have what sounds to be wind noise while TX and an occasional drop off, and a small amount of static on RX. I have the power ran to battery, fused approx 6" off the battery, grounded to a rear seat bolt, antenna is mounted in the roof. I wasn't feeling real confident with this ground and I'm really wondering if that could be the issue. The only thing I have done differently between the vehicles is switch from a 5/8w to a 1/4w antenna.

I plan to change the ground out when I get off work but it's racking my brain in the mean time. Thanks!

This emission noise problem suggests a ground fault of the coaxial cable. This could disturb the transmitter or the microphone.

check if the coaxial braid ground is well connected to the BNC and antenna.
check if the coaxial is pinched somewhere.

A short circuit from time to time in the coax or BNC could explain the melting of the fuse : very high current in the transmitter.

Other possibility : insufficient metallic surface for the antenna, or antenna mounted on a fiberglass roof

 

[mmckenna]

Today I was told while on a repeater channel that I have what sounds to be wind noise while TX and an occasional drop off, and a small amount of static on RX.

Where is the antenna mounted on the truck?

I've experienced radios doing this, and it often came down to the antenna making poor contact with the antenna mount.

Try this:
With the antenna screwed down all the way, hold the top of the whip and try moving it up and down. If it will move, then it's likely not making good contact with the center button of the NMO mount. I've found that some taller NMO antenna nuts and shallower NMO bases will allow this to happen.
You might need to try a different 1/4 wave antenna if this is what's happening.

If you don't feel confident in the radio ground, make sure you address that, too.