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HDTV Technical > The Official AVS Antenna and Related Hardware Topic!
holl_ands's Avatar holl_ands 11:55 AM 06-03-2014
Unless you are IN-THE-BEAM and less than a few FEET from the Celluar Antennas, they aren't a Radiation Health Threat:
http://hps.org/publicinformation/ate/faqs/cellphoneqa.html

The REAL CONCERN is that CELLPHONE you are holding right up to your HEAD for many hours a day......which is completely discounted by many "Official" sources as being a Health Threat....and if there WAS a real, provable problem, they would be banned:
http://cellphonehealthfacts.com

BTW: Because the frequency and strength of these Radio Waves is too low to actually IONIZE atoms, the only physical effect is to increase the HEAT of an irradiated object (like your HEAD).....which is barely enough to even measure. You get a LOT more HEAT by laying out in the SUN.....or staying in the SHADE at some Tropical locales....

jspENC's Avatar jspENC 07:50 AM 06-05-2014
I agree about the cell phones to the head. They will cause brain tumors. Use the speaker phone and keep the phone away from your head.
holl_ands's Avatar holl_ands 12:37 AM 06-07-2014
CM4228 Analyzed to Determine the Screen Reflector's Grid Size Effectiveness:

I wondered what was the most effective Gird Size in a Screen Grid Reflector, esp. given that the Wind Resistance
was HALF as much if the Height and Width were both doubled in size. The fol. results "should" be typical for
many other 4-Bay and 8-Bay Antennas....

So I added Grid Size Effectiveness Charts for 0.5"Hx1"W, 1"Hx2"W, 2"Hx2"W and 4"Hx4"W:
http://imageevent.com/holl_ands/multibay/8bayrefl/oldcm4228wrefl

ERRATA: Finally found suspected error in above Chart for F/B Ratio with 0.5"Hx1"W Grid size....
When I copied Raw Gain Spread Sheet for F/B & F/R, it was still pointing to Net Gain vice F/B Ratio data column.
Updated Charts are shown below. 4nec2 Charts are NOT affected.

Also added 3"Hx2"W....which nicely fits in-between plots for 2"Hx2"W and 4"Hx4"w.
Plots for 1"Hx1"W and 2"Hx4"W are not included, since they were within a few tenths of a dB of 1"Hx2"W and 2"Hx2"W respectively.
The spacing of the HORIZONTAL wires primarily determine performance, since Vertical Wires have only minimal effect on Horizontally Polarized signals.

REVISED NARRATIVE:
Added Grid Size Effectiveness Charts for 0.5"Hx1"W, 1"Hx2"W, 2"Hx2"W, 3"Hx2"W and 4"Hx4"W.
Raw Gain was about the SAME, except (as expected) some loss with and about 1-2 dB LOSS for 4"Hx4"W.
Front/Back Ratio was much better with 1"Hx2"W than 0.5"Hx1"W and progressively lower for 2"Hx2"W, 3"Hx2"W and 4"Hx4"W.
Front/Rear Ratio was about the SAME with 1"Hx2"W and 0.5"Hx1"W and progressively lower for 2"Hx2"W, 3"Hx2"W and 4"Hx4"W.

Old%20CM4228%20with%20Var%20Refl%20Grid%20Sizes%20-%20UHF%20Raw%20and%20Net%20Gain.jpg

Old%20CM4228%20with%20Var%20Refl%20Grid%20Sizes%20-%20UHF%20F_R%20and%20F_B%20Ratios.jpg
Alittleredhen's Avatar Alittleredhen 06:55 PM 06-09-2014

Don't know if this is the right place for this.......

 

Hi, I am pretty knowledgeable about alot of things on the house, but electronics is a mystery to me. And I don't have a dad or brother to ask these things of. Please help me figure out which antenna I need. 

 

I live in Boca Raton, FL zip 33487. My house is single story. I want to put a whole house antenna in the attic. Currently, I have an amplified splitter (plugged into electric with cable TV line) with 7 dedicated lines going to each room.

 

When I look up the address on those sites, it says I have a strong signal from both West Palm Beach and Miami. It says I am 30 miles from towers in West Palm and 50 from Miami. It says West Palm is 20 degrees and Miami is 300 degrees. From that info, that I have signals due north and due south, I believe I need a multidirectional antenna........correct?

 

Now, which one...........? I read about them on Amazon etc. but unfortunately, I don't understand the technical jargon that people who know about these things use. I chatted with a rep at one of the big online sellers of amplifiers and he suggested a DB8e antenna, a VHF antenna retro fit kit and a 9 way HD drop bidirectional amp CDA8 for $285.

 

I have a Roku and have been living with that since Comcast cut me off after they figured out they left basic cable on my TV's when I cut the cord. But I want to get this done. I have started and stopped many times because I'm afraid of buying the wrong thing. I don't mind spending the money. I want to do it once and do it right. I don't have 7 TV's right now, but I want the house to be set up for more if I buy them. Several are still analog right now and I use Roku with those. 

 

Thank you for any help...........Nina in Florida


DrLar's Avatar DrLar 10:00 AM 06-10-2014
We currently in need of TV reception indoors, this is a factory building (about 24ft high) so there could be a lot of interference and it also has a metal roof.

Some TVs are needed near the center of the building.

installing an outside antenna and running coax is out of the question (leased building they won't allow this)

Any good indoor antennas that could pull this off?

Thanks
SFischer1's Avatar SFischer1 10:26 AM 06-10-2014
Quote:
Originally Posted by DrLar View Post

We currently in need of TV reception indoors, this is a factory building (about 24ft high) so there could be a lot of interference and it also has a metal roof.

Some TVs are needed near the center of the building.

installing an outside antenna and running coax is out of the question (leased building they won't allow this)

Any good indoor antennas that could pull this off?

Thanks

Hi,

 

If there is one, you have found the goose that lays golden eggs. :cool:

 

One solution would be like my DTV system.

 

Mount an antenna near the outside and connect it to a HDHomeRUN tuner connected to a wireless router.

 

Then a wireless laptop could use the tuner and drive a large TV using HDMI.

 

Works great for me. YMMV

 

SHF


holl_ands's Avatar holl_ands 04:06 PM 06-10-2014
ERRATA to Post #16205 above: Finally found suspected error in above Chart for F/B Ratio with 0.5"Hx1"W Grid size....
When I copied Raw Gain Spread Sheet for F/B & F/R, it was still pointing to Net Gain vice F/B Ratio data column.
Updated Charts are shown above. 4nec2 Charts are NOT affected.

Also added 3"Hx2"W....which nicely fits in-between plots for 2"Hx2"W and 4"Hx4"w.
Plots for 1"Hx1"W and 2"Hx4"W are not included, since they were within a few tenths of a dB of 1"Hx2"W and 2"Hx2"W respectively.
The spacing of the HORIZONTAL wires primarily determine performance, since Vertical Wires have only minimal effect on Horizontally Polarized signals.
rdcollns's Avatar rdcollns 04:40 PM 06-10-2014
Quote:
Originally Posted by holl_ands View Post

ERRATA to Post #16205 above: Finally found suspected error in above Chart for F/B Ratio with 0.5"Hx1"W Grid size....
When I copied Raw Gain Spread Sheet for F/B & F/R, it was still pointing to Net Gain vice F/B Ratio data column.
Updated Charts are shown above. 4nec2 Charts are NOT affected.

Also added 3"Hx2"W....which nicely fits in-between plots for 2"Hx2"W and 4"Hx4"w.
Plots for 1"Hx1"W and 2"Hx4"W are not included, since they were within a few tenths of a dB of 1"Hx2"W and 2"Hx2"W respectively.
The spacing of the HORIZONTAL wires primarily determine performance, since Vertical Wires have only minimal effect on Horizontally Polarized signals.
Quote:
Originally Posted by holl_ands View Post

ERRATA to Post #16205 above: Finally found suspected error in above Chart for F/B Ratio with 0.5"Hx1"W Grid size....
When I copied Raw Gain Spread Sheet for F/B & F/R, it was still pointing to Net Gain vice F/B Ratio data column.
Updated Charts are shown above. 4nec2 Charts are NOT affected.

Also added 3"Hx2"W....which nicely fits in-between plots for 2"Hx2"W and 4"Hx4"w.
Plots for 1"Hx1"W and 2"Hx4"W are not included, since they were within a few tenths of a dB of 1"Hx2"W and 2"Hx2"W respectively.
The spacing of the HORIZONTAL wires primarily determine performance, since Vertical Wires have only minimal effect on Horizontally Polarized signals.

Would a change in the gauge of the grid bars affect this?
Calaveras's Avatar Calaveras 05:41 PM 06-10-2014
Quote:
Originally Posted by Alittleredhen View Post

Don't know if this is the right place for this.......

Hi, I am pretty knowledgeable about alot of things on the house, but electronics is a mystery to me. And I don't have a dad or brother to ask these things of. Please help me figure out which antenna I need. 

I live in Boca Raton, FL zip 33487. My house is single story. I want to put a whole house antenna in the attic. Currently, I have an amplified splitter (plugged into electric with cable TV line) with 7 dedicated lines going to each room.

When I look up the address on those sites, it says I have a strong signal from both West Palm Beach and Miami. It says I am 30 miles from towers in West Palm and 50 from Miami. It says West Palm is 20 degrees and Miami is 300 degrees. From that info, that I have signals due north and due south, I believe I need a multidirectional antenna........correct?

Now, which one...........? I read about them on Amazon etc. but unfortunately, I don't understand the technical jargon that people who know about these things use. I chatted with a rep at one of the big online sellers of amplifiers and he suggested a DB8e antenna, a VHF antenna retro fit kit and a 9 way HD drop bidirectional amp CDA8 for $285.

I have a Roku and have been living with that since Comcast cut me off after they figured out they left basic cable on my TV's when I cut the cord. But I want to get this done. I have started and stopped many times because I'm afraid of buying the wrong thing. I don't mind spending the money. I want to do it once and do it right. I don't have 7 TV's right now, but I want the house to be set up for more if I buy them. Several are still analog right now and I use Roku with those. 

Thank you for any help...........Nina in Florida


You should post this on the Miami/Ft. Lauderdale HDTV thread and be sure to include a link to your TV Fool report.

http://www.avsforum.com/t/43823/miami-ft-lauderdale-fl-hdtv
holl_ands's Avatar holl_ands 09:54 PM 06-10-2014
Quote:
Originally Posted by rdcollns View Post


Would a change in the gauge of the grid bars affect this?
Wire Size for Screen Grid Reflector isn't very important as long as it's in the "realistic" range of AWG18 to say AWG8.
And FYI for other Antennas Modelers: Surface Patch (alternative option) doesn't even HAVE an entry for the solid surface thickness....
Rugged1's Avatar Rugged1 04:55 AM 06-12-2014
Hi All

I'm very new to this and want to add an antenna in my attic as I slowly migrate away from Directv and my $100/mo cable bill.

http://www.tvfool.com/?option=com_wr...e1c68f89ba456a

I ran this report and don't know what type of antenna to get. I just want to reach the nashville locals (big 4+pbs). I have a 2 story house and would much rather put the antenna in my attic which has really good line of sight south towards the broadcast towers.

I already have coax in my attic that I can tap into but I'm not sure if and where I'd put an amp.

all help is greatly appreciated!
Calaveras's Avatar Calaveras 08:40 AM 06-12-2014
Quote:
Originally Posted by Rugged1 View Post
Hi All

I'm very new to this and want to add an antenna in my attic as I slowly migrate away from Directv and my $100/mo cable bill.

http://www.tvfool.com/?option=com_wr...e1c68f89ba456a

I ran this report and don't know what type of antenna to get. I just want to reach the nashville locals (big 4+pbs). I have a 2 story house and would much rather put the antenna in my attic which has really good line of sight south towards the broadcast towers.

I already have coax in my attic that I can tap into but I'm not sure if and where I'd put an amp.

all help is greatly appreciated!

Your TV Fool report says more than half your stations are not line of sight so this could be a problem for an attic installation. I assume you want all the stations at 263 and 220 degrees. You can probably split the difference at 240 degrees. You have channels 8 and 10 so you need high VHF in addition to UHF. I'd get the largest antenna in the Antennacraft HBU series or the Winegard HD769xP series you can fit in the attic. Since you have some very strong signals I would try it without a preamp first. It might be subject to overload. If you can't get everything you want then an outdoor installation is the next step.
Rugged1's Avatar Rugged1 09:37 AM 06-12-2014
Quote:
Originally Posted by Calaveras View Post
Your TV Fool report says more than half your stations are not line of sight so this could be a problem for an attic installation. I assume you want all the stations at 263 and 220 degrees. You can probably split the difference at 240 degrees. You have channels 8 and 10 so you need high VHF in addition to UHF. I'd get the largest antenna in the Antennacraft HBU series or the Winegard HD769xP series you can fit in the attic. Since you have some very strong signals I would try it without a preamp first. It might be subject to overload. If you can't get everything you want then an outdoor installation is the next step.
okay, thank you for that info. I do have the option to mount an antenna on the old Directv Mast but it's on the back side of the house and really in the opposite facing of the towers. Does that matter that I would have the peak of the roof in the way?

I have to believe that mounting inside the attic is actually a better solution since i can't mount on the front slope of my roof and i don't have a chimney.

thoughts?
Calaveras's Avatar Calaveras 10:37 AM 06-12-2014
Quote:
Originally Posted by Rugged1 View Post
okay, thank you for that info. I do have the option to mount an antenna on the old Directv Mast but it's on the back side of the house and really in the opposite facing of the towers. Does that matter that I would have the peak of the roof in the way?
There would be no benefit to have it outside just to look through the roof twice. Try the attic and see if you receive all the stations you want. Results vary so widely that no one can predict in advance exactly what your results will be.

Every location has a minimum installation required to receive the stations you want. If an outdoor antenna at 30' is required then there is no magic antenna that will perform the same in a lesser installation. All you can do is hope that the antenna you're wiling to install will meet your reception requirements.
Rugged1's Avatar Rugged1 06:30 PM 06-13-2014
Quote:
Originally Posted by Calaveras View Post
There would be no benefit to have it outside just to look through the roof twice. Try the attic and see if you receive all the stations you want. Results vary so widely that no one can predict in advance exactly what your results will be.

Every location has a minimum installation required to receive the stations you want. If an outdoor antenna at 30' is required then there is no magic antenna that will perform the same in a lesser installation. All you can do is hope that the antenna you're wiling to install will meet your reception requirements.
excellent...thank you. that's what I assumed. I didn't think putting it on the backside of my house would help. Plus my attic install spot would be higher obviously.

I currently have one of those mohu leaf antennas and put it on top of tv cabinet in the first floor of our house and pick up all the network stations I want with just a tiny bit of interference on a couple channels. I'm sure it's an inferior antenna and it's definitely mounted far lower in my house so I have to assume a higher powered antenna like you suggest will outperform.

thoughts...
Ennui's Avatar Ennui 04:19 PM 06-14-2014
Maybe you can mount on the peak end of your roof like I did? I can post more pics if you want to try that.
SFischer1's Avatar SFischer1 10:26 AM 06-23-2014
Quote:
Originally Posted by DrLar View Post
We currently in need of TV reception indoors, this is a factory building (about 24ft high) so there could be a lot of interference and it also has a metal roof.

Some TVs are needed near the center of the building.

installing an outside antenna and running coax is out of the question (leased building they won't allow this)

Any good indoor antennas that could pull this off?

Thanks
Hi,


While fixing up my bookmarks for the new (old) system I found this, really no help for the OP but may be of help for some people.


EV's Recommended & Top Rated DTV Indoor UHF/VHF Set Top Antenna Review Round-Up Guide


SHF
WeAreNotAlone69's Avatar WeAreNotAlone69 09:25 AM 06-30-2014
Quote:
Originally Posted by DrLar View Post
We currently in need of TV reception indoors, this is a factory building (about 24ft high) so there could be a lot of interference and it also has a metal roof.

Some TVs are needed near the center of the building.

installing an outside antenna and running coax is out of the question (leased building they won't allow this)

Any good indoor antennas that could pull this off?

Thanks
Metal roof is probably going to cause problems.

Unless you can site antenna thru a window, and /or are extremely close to the towers to get any kind of decent reception most likely a outside antenna will be needed... only other options are cable, and or satellite.

Q: You say they.won't allow a outside antenna, as in they don't want you drilling holes in their building?
If that is their only concern you could run the coax thru a roof vent and use a tripod with sand bags to weigh down antenna.

I seriously doubt they are going to use the excuse they don't want a antenna on the roof for "aesthetic reasons" on a "factory building", if so ask them to weigh the amount of money they are getting each month in rent on that factory building vs your need for a antenna.

BTW: If the building landlords agree to allowing a outside antenna to be installed or refuse, do a follow-up post detailing the entire affair. Such info might help others in a similar situation.

.
tripleM's Avatar tripleM 01:05 PM 06-30-2014
I have a flat screen TV mounted inside a kitchen cabinet.
The antenna is an indoor RCA ANT1400 from Best Buy located behind the vertical 'board' that is used to mount the flat screen inside the cab.

I get all the OTA networks fantastically - except one - the local NBC affiliate.
I tried moving antenna all around back there & still can't catch NBC unless the TV swings away from inside the cab a bit.
Strange but when the TV swings out - NBC works.
But when the TV is pushed back flat against the mounting board inside the cab, NBC signal goes dark.

The coax seem tights & all other channels come through regardless of position of TV.
Is this a reception problem or is it hardware?


My stats are as follows:
http://www.tvfool.com/?option=com_wr...e1c6f5e29e2ce5
SFischer1's Avatar SFischer1 01:42 PM 06-30-2014
Quote:
Originally Posted by tripleM View Post
...
Is this a reception problem or is it hardware?

My stats are as follows:
http://www.tvfool.com/?option=com_wr...e1c6f5e29e2ce5
It looks to me like an antenna selection problem.

Quote:
Originally Posted by TVFool
WWBT (Digital)

Channel: 12 (12.1)
Network: NBC
Maximum ERP: 26.000 kW
Coordinates: 37.506536 -77.503041

You may need an antenna that gets VHF-Hi as WWBT is not UHF.


SHF
holl_ands's Avatar holl_ands 03:19 PM 06-30-2014
If you can't get OTA DTV to work, you are a perfect candidate for COMCAST Cable TV. Call and ask about the cost (Introductory & AFTER the intro rate, est. $20/mo) of JUST "Limited Basic" (ONLY Local Channels and a few "gimmies") and also when bundled with Internet and/or Phone service (maybe $50/mo....you will NOT readily find the cost listed on their website....cable companies don't want people to KNOW about this low-cost option..sometimes called "Lifeline"):
http://customer.comcast.com/help-and...ed-basic-cable
http://forums.comcast.com/t5/forums/...&filter=labels

They also don't want you to know the low cost of their LEAST EXPENSIVE Digital Tier....the FAMILY TIER....and carefully find out if you have to pay for it on TOP of the cost of "Limited Basic":
http://customer.comcast.com/help-and...-tier-channels
http://forums.comcast.com/t5/forums/...?q=family+tier

If you MUST have Internet Service for your business (doesn't everyone), then adding a BUNCH of Digital TV Channels is only another $20/mo plus whatever (Free now, $2/mo later???) COMCAST is charging for the DTA (Digital Terminal Adapter) since I think they have gone to ALL Digital eliminating ALL Analog TV Channels. Obviously, they have a wide variety of Internet Data Rates to chose from.
http://www.comcastauthorizedoffers.c...inity-internet

Some curtent Deals:
http://www.comcastauthorizedoffers.c...est/xfinity-tv
http://www.comcast.com/cable-internet-packages.html
http://www.comcastauthorizedoffers.c...y-bundle-deals

They ALWAYS have a lower Intro Cost...be sure to ask about what the cost is AFTER the Intro period, presuming you sign up for the 24-mo contract (or NOT). If they waffle and wave their hands about not being able to predict the future, ask what OTHER customers are NORMALLY paying for the same services....or ask about it on the SAN FRANCISCO COMCAST thread:
San Francisco, CA - Comcast
ProjectSHO89's Avatar ProjectSHO89 06:13 PM 06-30-2014
You also put the antenna in one of the worst imaginable places for VHF noise- behind the TV- set as well as selecting an antenna that's nearly blind on VHF.
SFischer1's Avatar SFischer1 06:42 PM 06-30-2014
Quote:
Originally Posted by ProjectSHO89 View Post
You also put the antenna in one of the worst imaginable places for VHF noise- behind the TV- set as well as selecting an antenna that's nearly blind on VHF.
Somebody somewhat local to me had a problem with an antenna in a very similar location.

He could not get 54.1 but could get 54.2, 54.3, 54.4 ...

I blew him off with a "Does Not Compute".

Should that ever really happen the SF Bay OTA forum and mailing list would be flooded with reports.

------------------------------------
My looking up that "toy" antenna has caused me to get targeted ad's for them.


SHF
tylerSC's Avatar tylerSC 09:37 PM 06-30-2014
Quote:
Originally Posted by tripleM View Post
I have a flat screen TV mounted inside a kitchen cabinet.
The antenna is an indoor RCA ANT1400 from Best Buy located behind the vertical 'board' that is used to mount the flat screen inside the cab.

I get all the OTA networks fantastically - except one - the local NBC affiliate.
I tried moving antenna all around back there & still can't catch NBC unless the TV swings away from inside the cab a bit.
Strange but when the TV swings out - NBC works.
But when the TV is pushed back flat against the mounting board inside the cab, NBC signal goes dark.

The coax seem tights & all other channels come through regardless of position of TV.
Is this a reception problem or is it hardware?


My stats are as follows:
http://www.tvfool.com/?option=com_wr...e1c6f5e29e2ce5
RF12 is VHF and more subject to noise and interference from the TV itself. And those flat panel antennas are not designed to receive VHF. I think an HDTVa antenna from HHG would work better, as it has rabbit ears which should receive VHF-12, as well as a UHF element for the other channels. At any rate, you will need rabbit ears for WWBT at the very least. Although an outside antenna such as the HBU-22 would be even better.
deltaguy's Avatar deltaguy 11:51 PM 06-30-2014
Quote:
Originally Posted by tripleM View Post
I have a flat screen TV mounted inside a kitchen cabinet.
The antenna is an indoor RCA ANT1400 from Best Buy located behind the vertical 'board' that is used to mount the flat screen inside the cab.

I get all the OTA networks fantastically - except one - the local NBC affiliate.
I tried moving antenna all around back there & still can't catch NBC unless the TV swings away from inside the cab a bit.
Strange but when the TV swings out - NBC works.
But when the TV is pushed back flat against the mounting board inside the cab, NBC signal goes dark.

The coax seem tights & all other channels come through regardless of position of TV.
Is this a reception problem or is it hardware?


My stats are as follows:
http://www.tvfool.com/?option=com_wr...e1c6f5e29e2ce5
Swinging the tv out is blocking interference or multipath. Turning off devices using electricity near the antenna might help. Good Luck.
tripleM's Avatar tripleM 12:34 PM 07-01-2014
Quote:
Originally Posted by deltaguy View Post
Swinging the tv out is blocking interference or multipath. Turning off devices using electricity near the antenna might help. Good Luck.
Thanks for the suggestion.
I don't think anything is interfering with it electronically as there is a microwave below the TV location in a separate compartment (cabinet) & I've tested it with no problems.

Last night - I actually pulled the antenna's coax cable towards the back of the TV to give it a bit more slack, then pushed the TV back against the mounting board (which is when the problem occurs regularly) - this time the VHF channel 12.1 retained it's signal - 5 bars out of 5 according to the TV signal meter.

This is leading me to believe, that the coax cable or antenna itself is faulty.

Thoughts?
deltaguy's Avatar deltaguy 11:36 PM 07-02-2014
Quote:
Originally Posted by tripleM View Post
Thanks for the suggestion.
I don't think anything is interfering with it electronically as there is a microwave below the TV location in a separate compartment (cabinet) & I've tested it with no problems.

Last night - I actually pulled the antenna's coax cable towards the back of the TV to give it a bit more slack, then pushed the TV back against the mounting board (which is when the problem occurs regularly) - this time the VHF channel 12.1 retained it's signal - 5 bars out of 5 according to the TV signal meter.

This is leading me to believe, that the coax cable or antenna itself is faulty.

Thoughts?
If 12.1 continues without problems, you're good to go. I wouldn't assume that interference can be ruled out by the microwave not causing a problem. All electrical devices are not created equal.
ADTech's Avatar ADTech 08:23 AM 07-03-2014
Quote:
Originally Posted by :
I wouldn't assume that interference can be ruled out by the microwave not causing a problem. All electrical devices are not created equal.

This is correct. Different devices can have spurious emissions at very different frequencies. Such unwanted emissions create interference when they happen to coincide with a desired frequency.

As an example, the microwave in my kitchen interferes with my 4G/LTE wireless connection but never interferes with the 3G (800 MHz) service or reception of any of my OTA UHF signals.
tripleM's Avatar tripleM 12:55 PM 07-03-2014
Quote:
Originally Posted by deltaguy View Post
If 12.1 continues without problems, you're good to go. I wouldn't assume that interference can be ruled out by the microwave not causing a problem. All electrical devices are not created equal.
Well now I am back to square one again.

Tried a new antenna& same issue again.swing the mounting arm gets 12.1 to work but pushing it back to put the TV away in the cabinet - stops 12.1 from working.

Something is interfering with it.
rabbit73's Avatar rabbit73 04:31 PM 07-03-2014
What new antenna did you try?

The manual says:

"Note: The ANT1400 may work well sitting on your TV or other components. However, because electronic components (like your TV) can sometimes interfere with the antenna's reception, you might notice an effect on the antenna's
performance. Likewise, placing the antenna on a metal surface may interfere with reception. If the antenna isn't performing as well as expected, try moving it away from the component or placing it on another surface. Then, re-scan for channels on your TV or converter box."
http://manuals.solidsignal.com/ANT1400_Manual.pdf

I'm very skeptical about claims for an antenna being multi-directional. Notice that CH12 is almost at a right angle from your other channels.

If your tests tell you that the antenna needs to be further away from the TV, then you must believe your test results and go to plan B.

Other posters have told you that CH12 is on VHF, which is more prone to electrical interference, and your all-channel antenna may not perform as well on VHF as it does on UHF. I agree with them.
Tags: Channel Master Cm 4228 8 Bay Hdtv Uhf Antenna Cm4228hd
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