Thread Tools Display Modes
Old 07-02-2010, 10:46 PM   #11
Bus Crazy
Join Date: Jan 2008
Location: Upstate NY (Mohawk Valley)
Posts: 1,096
Re: TV antenna...


There is no difference between a digital antenna and an analog antenna, except for marketing hype. The antennas pick up a particular set of frequencies, while digital versus analog is the waveform used for encoding and decoding the picture and sound on that frequency.

That being said, during the transition in the states, most digital TV was on UHF. During that time, most stations had two transmitters on the air. For example, analog 6 would be on VHF 6, and digital 6.1, 6.2, and 6.3 would really be on channel 35 or something. Antennas like the Phillips are high-performance UHF-only antennas. The Phillips worked great during this period (my boss brought one to work to try out) because VHF was almost completely analog.

After the transition, each station got to pick which channel to stay on. Did they want to turn off analog 6 and digital 35 and turn on digital 6, or did they just want to turn off analog 6 and keep digital 35 where it was. The UHF-only antennas suddenly became not so good when many or most stations shifted to their old frequencies.

It is important to note that all the antennas suggested in this thread have built-in preamplifiers. A good, low-noise preamplifier is crucial to fringe area reception, and is important when the antenna metal is the wrong size for naturally tuning the channel. A full-sized channel 2 antenna should have rods that extend 52 inches on either side of the boom. A channel 15 antenna would only need rods that extend 5 or 6 inches on each side. The rod length for natural tuning goes down as the channel number goes up. The preamp helps make up for the mismatch.

The antenna Smitty has is the best one to meet the parameters you described - omnidirectional, non-retracting, useful in motion.

A problem with omni-directional antennas is multipath reception. You may pick up multiple beams from the tower to your antenna. When signals are reflecting off of urban buildings or the Rockies, a beam that bounces off four or five obstructions will take longer to reach your antenna than a beam that bounces only once or twice. On an analog picture, this produces "ghosting" where the late beam will display a second head on a person to the side of the one displayed by the earlier beam. On a digital signal, late ones and zeros arriving with near equal strength may cancel out the digital information, causing the picture to freeze up or not lock in.

A directional antenna is not practical in motion, without gyro-controlled steering like the mobile satellite set-ups. But a directional antenna can be pointed to the strongest beam reaching it, and not pulling in so many weaker beams hitting it from the sides with different arrival delays. This can greatly help eliminate ghosting and loss of digital lock.

The best of both worlds would be to mount an antenna like Smitty's for in-motion use plus stops in good signal areas, and have a pre-amplified directional antenna like Griff's in a storage bay to be able to set up when parked in a fringe or multipath area. An connector can be pre-wired for the directional antenna with an A/B selector switch to pick antennas.
Someone said "Making good decisions comes from experience, experience comes from bad decisions." I say there are three kinds of people: those who learn from their mistakes, those who learn from the mistakes of others, and those who never learn.
Redbear is offline   Reply With Quote
Old 07-05-2010, 07:53 PM   #12
Join Date: Aug 2009
Posts: 187
Year: 1963
Coachwork: Grumman
Chassis: Chevrolet
Engine: Chevy 292 I-6
Re: TV antenna...

I like my old school Winegard "AWACS" looking disc omnidirectional antenna. Looks like a UFO landed on the roof.

2 "shotgunned Terk antennas inside my house has unreliable, sparse signal, the Winegard disc pulls in 13 channels in the driveway.

Looks kinda like this...

Ob1 is offline   Reply With Quote
Old 07-06-2010, 02:19 PM   #13
Bus Crazy
Stuff's Avatar
Join Date: Apr 2010
Location: Estevan, Saskatchewan, Canada
Posts: 1,485
Year: 1990
Coachwork: Goshen
Chassis: Ford
Engine: 7.3
Rated Cap: 25
Send a message via AIM to Stuff Send a message via MSN to Stuff
Re: TV antenna...

thats what parents have on their camper. "signal commander 2" it says on it. used it this last weekend camping. wasnt bad but i forgot the booster on when i crashed and killed the battery...
1990 E-350 Goshen Coach - 7.3L Diesel --->

My Youtube channel -
Stuff is offline   Reply With Quote
Old 10-13-2010, 06:10 AM   #14
Bus Nut
Join Date: Mar 2009
Location: California, Just NorthEast of San Fransisco
Posts: 539
Re: TV antenna...

Every time I see those disc antennas I keep thinking about finding a model of the original enterprise to mount it to... Pulls in TV, and makes people shake their heads while muttering "Startrek Geek!"...
Sojakai is offline   Reply With Quote

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
TV Antenna Doug M Conversion Tutorials and How-to's 4 11-29-2014 05:19 PM
Installing a Digital TV Antenna lornaschinske Everything Else | General Skoolie Discussions 9 01-29-2013 05:33 PM
STARK ANTENNA FYI! BUSBOZO Conversion General Discussions 1 08-16-2010 08:46 PM
Wifi antenna on a skoolie... jkindt Conversion General Discussions 7 06-01-2010 12:50 PM
CB Radio and antenna (s) Abbott Conversion General Discussions 3 06-26-2008 10:05 PM

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 02:42 PM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.