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Search: Posts Made By: GroundUrMast
Forum: Help With Reception 11-Oct-2019, 12:18 AM
Replies: 9
Views: 755
Posted By GroundUrMast
Are any other channels effected?

Are any other channels effected?
Forum: TV Fool Discussion / Database Updates 4-Oct-2019, 10:29 PM
Replies: 3
Views: 1,141
Posted By GroundUrMast
For those outside the Seattle market: ...

For those outside the Seattle market:

Several of the major network stations are advertising October 19th, 2019 as the cut date for their re-pack moves.
Forum: Special Topics 29-Sep-2019, 10:25 PM
Replies: 5
Views: 335
Posted By GroundUrMast
I can't think of any reason not to place...

I can't think of any reason not to place insulated wire against pipe or conduit. (I would caution against placing the mast or coax bonding conductor inside metal conduit though. The metal conduit...
Forum: Special Topics 29-Sep-2019, 4:54 PM
Replies: 5
Views: 335
Posted By GroundUrMast
It looks like we were both writing and posting at...

It looks like we were both writing and posting at the same time :)


1. Yes, I would opt to use only the existing electrical service GES. This would allow you to avoid the need for expensive #6...
Forum: Special Topics 29-Sep-2019, 4:19 PM
Replies: 5
Views: 335
Posted By GroundUrMast
Rather than running #6 AWG all the way around or...

Rather than running #6 AWG all the way around or over your house, consider abandoning the isolated ground rod and running #10 AWG from the mast to the electrical service... The electrical service...
Forum: TV Fool Discussion / Database Updates 21-Sep-2019, 5:16 PM
Replies: 3
Views: 1,141
Posted By GroundUrMast
Thanks for that detailed information Tower Guy. ...

Thanks for that detailed information Tower Guy. So far, my attempts to contact KING-TV engineering staff have been unsuccessful. I'm hoping to obtain first hand info re. their repack time line.
...
Forum: TV Fool Discussion / Database Updates 20-Sep-2019, 10:24 PM
Replies: 3
Views: 1,141
Posted By GroundUrMast
Seattle Area KING-TV

It appears that KING-TV (Virt. Chans. 5.1, 5.2 & 5.3 -- Rea-CH 48) is operating at reduced power and/or on their auxiliary antenna. On 9/19/2019 I began seeing lower raw signal levels reported by my...
Forum: Enthusiast's Exchange 12-Sep-2019, 11:06 PM
Replies: 11
Views: 8,746
Posted By GroundUrMast
TheFu, Thanks for sharing this. Given the...

TheFu, Thanks for sharing this. Given the hardware transcoding capability of my HDHomeRun EXTEND
(Model: HDTC-2US), I had not considered the need for ffmpeg. Using either the command line or GUI to...
Forum: Special Topics 25-Aug-2019, 2:48 AM
Replies: 6
Views: 811
Posted By GroundUrMast
I have drilled through the roof deck and then in...

I have drilled through the roof deck and then in the attic added 2X4 or heavier stock as a backer cleat to lag or bolt through. But if I'm understanding your post, you don't have attic access??? I...
Forum: Antennas 19-Aug-2019, 2:38 PM
Replies: 49
Views: 42,404
Posted By GroundUrMast
Both... In a typical residential area with...

Both...

In a typical residential area with above ground poles, you see one or more high voltage lines at the top of the pole. If you look closely, the pole mounted transformer is connected to one...
Forum: Antennas 19-Aug-2019, 6:11 AM
Replies: 8
Views: 1,229
Posted By GroundUrMast
Here is another online calculator, for designing...

Here is another online calculator, for designing a Log-Periodic-Dipole-Array.

https://hamwaves.com/lpda/en/index.html
Forum: Help With Reception 17-Aug-2019, 5:43 PM
Replies: 6
Views: 1,253
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: 8
Views: 1,229
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: 28
Views: 1,670
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: 8
Views: 1,229
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: 49
Views: 42,404
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: 49
Views: 42,404
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: 49
Views: 42,404
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: 687
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: 1,378
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: 1,378
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: 1,378
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: 45,700
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: 1,378
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: 1,378
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.
...
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