View single post by Tsquare

Posted: Mon Nov 13th, 2017 03:17 pm

Quote

Full Topic

Tsquare

Joined: Fri Nov 10th, 2017

Location: Suwanee, Georgia USA

Posts: 1540

Status:

Offline

Reputation:

Reputation Points: $user_rep

Member's Gallery

On a 4 watt system it will improve the gain. Most "canned" antenna/coax combo's come with 18' cables and are tuned at the factory with the antenna stretched the maximum distance from the transmitter. On a vehicle there are other factors that will affect the signal to wave ratio. Some of those factors are location of the antenna; the further away from the transmitter usually the better, being on an optical plane higher than any metal is better, other electronics or electrical fields.
John112deere is running his antennae on his roof. That is the good location but a 102" steel whip mounted on the top of the bed frame rail at the tailgate would be optimal. Regardless where it is located it needs to be tuned for the lowest SWR reading possible on CH1 and CH40.
The Wilson 1000 has a great system in that there are 2 allen screws holding the steel whip in the mount making it an easy system to tune. The screws can be loosened and the antenna adjusted out to its max length. Record your SWR numbers on ch1 and ch40. Loosen and adjust the antenna 1/4" down into the mount and record you numbers again. Keep doing this until you get the lowest numbers on your SWR meter. If it has been dropping and you bottom out the antenna mast in the mount then it is time to start trimming it. You have about an inch of adjustment room.
BTW: I am a RF field engineer

Last edited on Mon Nov 13th, 2017 03:20 pm by Tsquare

____________________
Tony
NE ATL
'04 XLT regular cab 3.slo stepside
Semi retirement