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PA770,
The pre-amp only gives you better ears, so to speak. It boosts the receive. The swr change you have is not severe. The 6" difference in elev. can cause that. Get a good ground with multiple locations, then reset the swr. Remember "One is none, two is one." See my above post on this. I have been able to remove the IF from the power system by using multiple ground locations. Also, with my radio in the truck. Had bad noise on CB, grounded everything I could with stranded to the frame. Bed, cab, racks, and motor, with multiple locations. Ran the + and - power supply to battery. Bad noise all gone. Good ground is key.

Check the ground wire running down that power pole you have in the picture. I have seen those as a culprit. Looks a lot like some I've seen around SE Texas. We have a similar problem here. Have to call the Victoria Elect. Co-Op and have them trouble shoot.

<blockquote data-quote="Redbeard U812" data-source="post: 639478" data-attributes="member: 52802">PA770,&nbsp; The pre-amp only gives you better ears, so to speak. It boosts the receive. The swr change you have is not severe. The 6&quot; difference in elev. can cause that. Get a good ground with multiple locations, then reset the swr. Remember &quot;One is none, two is one.&quot; See my above post on this. I have been able to remove the IF from the power system by using multiple ground locations. Also, with my radio in the truck. Had bad noise on CB, grounded everything I could with stranded to the frame. Bed, cab, racks, and motor, with multiple locations. Ran the + and - power supply to battery. Bad noise all gone. Good ground is key.Check the ground wire running down that power pole you have in the picture. I have seen those as a culprit. Looks a lot like some I&#039;ve seen around SE Texas. We have a similar problem here. Have to call the Victoria Elect. Co-Op and have them trouble shoot.</blockquote>

[QUOTE="Redbeard U812, post: 639478, member: 52802"] PA770, The pre-amp only gives you better ears, so to speak. It boosts the receive. The swr change you have is not severe. The 6" difference in elev. can cause that. Get a good ground with multiple locations, then reset the swr. Remember "One is none, two is one." See my above post on this. I have been able to remove the IF from the power system by using multiple ground locations. Also, with my radio in the truck. Had bad noise on CB, grounded everything I could with stranded to the frame. Bed, cab, racks, and motor, with multiple locations. Ran the + and - power supply to battery. Bad noise all gone. Good ground is key. Check the ground wire running down that power pole you have in the picture. I have seen those as a culprit. Looks a lot like some I've seen around SE Texas. We have a similar problem here. Have to call the Victoria Elect. Co-Op and have them trouble shoot. [/QUOTE]

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