Go Back   PowerStrokeArmy > Non - Specific > Truck Audio

Reply
 
Thread Tools Display Modes
  #21  
Old 12-23-2017, 12:55 PM
C2tuck's Avatar
C2tuck C2tuck is offline
Lieutenant
Member's Gallery
 
Join Date: Nov 2016
Location: North Texas
Posts: 616
Default

Quote:
Originally Posted by Jomax View Post
How do cars get away without those little wing antennas on the roof? Itís factory too..


Sent from my iPhone using Tapatalk


Kinda what I was thinking. Even the old 80ís Chevy trucks that had them inside the windshield worked decent


Sent from my iPhone using Tapatalk
__________________
2015 CCSB F250 XLT FX4...stock...for now...
  #22  
Old 12-25-2017, 06:30 AM
Dave_Nevada's Avatar
Dave_Nevada Dave_Nevada is offline
Sergeant
Member's Gallery
 
Join Date: Dec 2017
Location: Reno, NV
Posts: 126
Default

Quote:
Originally Posted by Jomax View Post
How do cars get away without those little wing antennas on the roof? It’s factory too..


Sent from my iPhone using Tapatalk
It all depends on what frequency they are being used to receive. The higher the frequency, the shorter the antenna. They two are inversely proportional.

Cell phone antennas are very short due to their higher frequency band. Those 'wing antennas are usually for GPS and or Cell phone. They are big enough to house both.

For instance, in radar, the actual antenna is about 1/8" tall inside the feed horn of the dish.

Back in the 80's, when servicing a down Satellite receiver, my first job was to inspect the massive dish feed horn for 'critters'. Often I would find a spider that decided to take up residency inside the feed horn, and every time the little dude would move, the place complained of poor or no reception. That's because the spider was literally blocking the signal from the dish from being received on the 1/8" tall antenna. So part of my tool kit to repair those 3 meter dish installations was 1 can of bug spray, and another can of contact cleaner to remove the oil from the bug spray.

Why was the antenna so small?

The microwave frequency band is very high on the light spectrum.

Same reason for the winged antenna on the roof of a car, or a 'nub' style. It all depends on what they are being used for.

Thus, a short antenna for GPS or cell phone in the car.
__________________
1999 F350 7.3 ZF6 - 650 2WD stock ride
1968 M35A2 6 cyl Continental, 6x6, Spicer 5spd, 2 spd rear end
1965 Ford Galaxie 2dr HT stroked FE 427 Side-oiler (482 ci)
2000 Excursion V-10 6.8L 4WD
Use your head numbskull, bigger isn't always better.
Just 'cause you can, doesn't mean you should.

Last edited by Dave_Nevada; 12-25-2017 at 06:35 AM.
  #23  
Old 12-25-2017, 08:16 AM
BIG JUICE's Avatar
BIG JUICE BIG JUICE is offline
Lieutenant
Member's Gallery
 
Join Date: Jun 2013
Location: Apollo beach FLA
Posts: 668
Default

Quote:
Originally Posted by Jomax View Post
How do cars get away without those little wing antennas on the roof? Itís factory too..


Sent from my iPhone using Tapatalk
after my internet research(lol) apparently they have an amplifier built in that is correctly set to the right gain for length of antenna
__________________
2015 F250 platinum, flopro 5", jones turbine 5050xl, polished No Limit stage 2/pg 7 and prefilter intake, h&s intercooler pipe(throttlebody-gone) and half ccv reroute, jenny craig, sotf gear hedd tune, Rigid DOT fogs, Chinese 40" radius led, amp steps, weathertechs, edge cts2, titan tank, dieselsite fuel filter, blue ox gooseneck, Hellwig bars, retrofit projectors, linex plat, retrax cover,full Carli 2.5" backcountry,fox 2.0 res shocks, toyo rt 37", OUO ala & bars
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 02:37 PM.

 

Powered by vBulletin®
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

Designed by Military Ltd