View Single Post
Old 29-Sep-2015, 7:28 PM   #5
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,747
Thanks for the report. Looks like you are at the west side of Union City PA.

What channels do you get OK and what channels are a problem when it is not raining?

Ham radio operators wet the ground at the base of their tower so that the ground radial wires make a stronger transmitted signal when the tower itself is used as a vertical antenna.
Quote:
do I have a grounding problem???
The coax shield should be grounded with a grounding block that is connected to the house electrical system ground with 10 gauge copper wire for electrical safety and to reject interference. For further compliance with the electrical code (NEC), the mast should also be grounded in a similar manner to drain any buildup of static charge, but the system will not survive a direct strike.



There is a simple test you can make to listen for power line noise. Use a battery operated radio that tunes the AM broadcast band, tuned to an unused frequency at the high end (1600 kHz) and then at the low end (540). If you hear power line noise on AM, it is often on the TV bands. A VHF receiver that tunes the aircraft band will also work, because it is also AM. An FM radio doesn't work well to hunt for power line noise. Forum member MikeBear had a problem that he tracked down that way. He could also pick it up on his car radio.
thread
One channel issue, high VHF
http://forum.tvfool.com/showthread.php?t=15701
post
http://forum.tvfool.com/showpost.php...00&postcount=5
Quote:
Originally Posted by MikeBear View Post
Ok, I did find heavy interference (buzzing) on AM band at 530. It starts as I drive into my 220' long driveway, and stays as I get into my garage. This parallels the power line wires going to my house.

Anyway, I read on Denny's antenna site (he's only about 35 miles from me) about another person that unplugged a "power tender" charger, and got rid of the interference. I also have a $20 Harbor Freight power tender charging a battery in my garage. I unplugged it, and the AM interference stopped IMMEDIATELY! http://www.harborfreight.com/15-amp-...ner-99857.html
Quote:
used a compass and have the antenna pointing at 315 degrees...
325 magnetic might be better.
Quote:
...have one big Maple tree across the road direct inline of antenna about 50 yards away
Uh-Oh, not good.
__________________
If you can not measure it, you can not improve it.
Lord Kelvin, 1883
http://www.megalithia.com/elect/aeri...ttpoorman.html

Last edited by rabbit73; 29-Sep-2015 at 8:11 PM.
rabbit73 is offline   Reply With Quote