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Search: Posts Made By: GroundUrMast
Forum: Help With Reception Yesterday, 5:43 PM
Replies: 4
Views: 163
Posted By GroundUrMast
It appears that your area has an abundance of...

It appears that your area has an abundance of trees. I face the same problem here in the Northwest. Even though simulations predict noise margins for my stations of interest to be in the rage of +41...
Forum: Antennas 13-Aug-2019, 12:09 AM
Replies: 7
Views: 416
Posted By GroundUrMast
I need to get back up to speed with 4NEC2...

I need to get back up to speed with 4NEC2 still... But I expect to prove you right. There are a few things that can be done to broaden the frequency response of an antenna. The first that comes to...
Forum: Help With Reception 12-Aug-2019, 1:38 AM
Replies: 26
Views: 460
Posted By GroundUrMast
If the shades are plastic they will have no...

If the shades are plastic they will have no significant effect on the antenna performance. If they are metallic they will have quite a bit of effect which will be frequency dependent. If the distance...
Forum: Antennas 12-Aug-2019, 1:06 AM
Replies: 7
Views: 416
Posted By GroundUrMast
You're right Joe... Finding any commercially made...

You're right Joe... Finding any commercially made L-VHF antennas has become nigh-on-impossible. I've just finished installing 4NEC2 antenna modeling software on my new computer so as I get back up to...
Forum: Antennas 11-Aug-2019, 3:18 AM
Replies: 47
Views: 40,504
Posted By GroundUrMast
Yes. For example I live in an area that has high...

Yes. For example I live in an area that has high voltage transmission lines within a quarter mile. If there was a line down there will be high voltage at the point of contact to the earth and the...
Forum: Antennas 11-Aug-2019, 3:05 AM
Replies: 47
Views: 40,504
Posted By GroundUrMast
You are correct, the NEC makes reference to 25...

You are correct, the NEC makes reference to 25 ohms in 250.53 and requires an additional rod if that value is not achieved. Until a few years ago, the area I live in was so well known for poor ground...
Forum: Antennas 11-Aug-2019, 2:48 AM
Replies: 47
Views: 40,504
Posted By GroundUrMast
The traditional method of measuring ground rod...

The traditional method of measuring ground rod resistance has been the "Three Point Fall of Potential" (TPFP) though there are alternate methods as well. The cost of specialized equipment with...
Forum: Help With Reception 10-Aug-2019, 10:15 PM
Replies: 1
Views: 158
Posted By GroundUrMast
You are definitely in the fringe area of signals...

You are definitely in the fringe area of signals from Sioux City. I've taken the liberty of running a search based on an estimate of your location (given the relatively flat terrain great precision...
Forum: Help With Reception 10-Aug-2019, 3:11 PM
Replies: 16
Views: 439
Posted By GroundUrMast
As far as metric/imperial conversion is...

As far as metric/imperial conversion is concerned, I rely on the fact that exactly 25.4 mm = 1 inch... And there are plenty of online conversion calculators.

I expect that for the near future at...
Forum: Help With Reception 9-Aug-2019, 6:48 PM
Replies: 16
Views: 439
Posted By GroundUrMast
There are many dipole antenna calculators...

There are many dipole antenna calculators available on the web... Ex. http://www.westmountainradio.com/antenna_calculator.php?frequency=69

I also found this calculator that designs multi-element...
Forum: Help With Reception 9-Aug-2019, 3:33 PM
Replies: 16
Views: 439
Posted By GroundUrMast
Winegard and Channel Master post useful...

Winegard and Channel Master post useful information on their public websites: ...
Forum: Antennas 9-Aug-2019, 5:58 AM
Replies: 24
Views: 44,242
Posted By GroundUrMast
A quick but worthwhile read:...

A quick but worthwhile read: http://www.hdtvexpert.com/tag/low-band-vhf-tv-reception/
Forum: Help With Reception 8-Aug-2019, 6:24 PM
Replies: 16
Views: 439
Posted By GroundUrMast
I am an unpaid volunteer here at TVFool. I...

I am an unpaid volunteer here at TVFool. I honestly don't know any details re. the size of their staff and have to assume they simply have limited resources for keeping the database 100% current.
...
Forum: Help With Reception 8-Aug-2019, 6:19 PM
Replies: 16
Views: 439
Posted By GroundUrMast
There are a number of large all channel antennas...

There are a number of large all channel antennas still available. Winegard, Channel Master and RCA being at the top of my list. Be careful to compare the available space vs. the antenna dimensions.
...
Forum: Help With Reception 7-Aug-2019, 5:36 PM
Replies: 28
Views: 517
Posted By GroundUrMast
Re. Yagi style antennas in general (which the...

Re. Yagi style antennas in general (which the Y5-7-13 and ANT751 are examples of);

It's quite common to see antennas built with no insulator at the point the directors and reflector attach to the...
Forum: Help With Reception 7-Aug-2019, 2:55 PM
Replies: 28
Views: 517
Posted By GroundUrMast
Antenna design is sorta like golf... If you hit...

Antenna design is sorta like golf... If you hit the ball just right, it goes in the cup... Left, right, long or short are all a miss. De-tuning an antenna in resonance or impedance either high or low...
Forum: Help With Reception 7-Aug-2019, 2:49 PM
Replies: 28
Views: 517
Posted By GroundUrMast
I'd suggest using a UVSJ with the unmodified...

I'd suggest using a UVSJ with the unmodified ANT-751 connected to the VHF port and the UHF antenna attached to the UHF port.
Forum: Help With Reception 7-Aug-2019, 2:47 PM
Replies: 28
Views: 517
Posted By GroundUrMast
To be sure I was remembering correctly, I went...

To be sure I was remembering correctly, I went out to my shop and took a look at my Y5-7-13 that's been sitting in storage for the last few years. On mine, only the folded dipole section is directly...
Forum: Help With Reception 7-Aug-2019, 4:21 AM
Replies: 6
Views: 177
Posted By GroundUrMast
I may be assuming incorrectly, but it sounds like...

I may be assuming incorrectly, but it sounds like the existing antenna is cosmetically unacceptable in the test location??? Given that the existing antenna works, can you find a closet shelf with...
Forum: Help With Reception 6-Aug-2019, 8:39 PM
Replies: 26
Views: 460
Posted By GroundUrMast
Thanks for catching that.

Thanks for catching that.
Forum: Help With Reception 6-Aug-2019, 7:28 PM
Replies: 6
Views: 152
Posted By GroundUrMast
I suppose I have to give them a point for...

I suppose I have to give them a point for responding... But can I deduct points for the response?
Forum: Help With Reception 6-Aug-2019, 4:47 AM
Replies: 6
Views: 177
Posted By GroundUrMast
There are quite a number of Antennas Direct...

There are quite a number of Antennas Direct antennas to choose from. The Eclipse does not have intentional support for VHF reception which means that you may not see the Fox affiliate KTBC or any...
Forum: Antennas 5-Aug-2019, 9:52 PM
Replies: 4
Views: 397
Posted By GroundUrMast
I was not able to find this model on the RCA web...

I was not able to find this model on the RCA web site. All I can offer is an observation based on the photo and Menards ad copy... The antenna appears to be nothing more than a couple of dipoles...
Forum: Help With Reception 5-Aug-2019, 7:30 PM
Replies: 11
Views: 369
Posted By GroundUrMast
I wish... But physics comes with some laws that...

I wish... But physics comes with some laws that are pretty much impossible to break. Small antennas have less capture area and are therefor unable to collect as much signal power as a larger well...
Forum: Help With Reception 5-Aug-2019, 2:38 AM
Replies: 26
Views: 460
Posted By GroundUrMast
If you are receiving virtual channels 9.1, 9.2 &...

If you are receiving virtual channels 9.1, 9.2 & 9.3 with out difficulty, the likely problem is one of the following:

1. The broadcaster is not currently transmitting that sub-channel or they are...
Showing results 1 to 25 of 500

 

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