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Search: Posts Made By: GroundUrMast
Forum: Help With Reception 17-Feb-2020, 1:53 AM
Replies: 17
Views: 3,940
Posted By GroundUrMast
The Antennas Direct 'Juice' preamp is working...

The Antennas Direct 'Juice' preamp is working well for me. It has not shown any signs of overload despite the rather strong levels of many of the signals. (I'm driving relatively long runs of coax...
Forum: Help With Reception 29-Jan-2020, 10:43 PM
Replies: 2
Views: 548
Posted By GroundUrMast
Any part of the system that's exposed to the...

Any part of the system that's exposed to the elements for 7 years is suspect more than parts that have been protected. Start at the beginning, the antenna;

A close inspection for corrosion, water...
Forum: Help With Reception 28-Jan-2020, 3:37 AM
Replies: 3
Views: 668
Posted By GroundUrMast
The cost of direct connection is very low, one...

The cost of direct connection is very low, one connector, So trying it is not something I can argue against... I just don't expect a 0.5 dB improvement to produce a noticeable change in reception...
Forum: Help With Reception 27-Jan-2020, 5:21 PM
Replies: 3
Views: 668
Posted By GroundUrMast
In practice... No. At 600 MHz, the top of the OTA...

In practice... No. At 600 MHz, the top of the OTA TV band, RG-6U will have about 5 dB of loss for every 100 feet. So 10 feet would have only 0.5 dB of loss. If your signal is already that close to...
Forum: Help With Reception 10-Jan-2020, 10:30 PM
Replies: 2
Views: 340
Posted By GroundUrMast
In an effort to get a more complete idea of what...

In an effort to get a more complete idea of what signals will be like with the completed repack I ran a rabbitears report for you (based on an estimate of your location)...
Forum: Help With Reception 10-Jan-2020, 8:02 PM
Replies: 18
Views: 470
Posted By GroundUrMast
Thanks for jogging my memory TG... In the...

Thanks for jogging my memory TG...

In the past I've thought about using line amps as RF switches. Simply power up the amp to pass signal, power down to block it.

Likely the most practical...
Forum: Help With Reception 9-Jan-2020, 6:17 PM
Replies: 18
Views: 470
Posted By GroundUrMast
I'm not aware of an 'off the shelf' retail...

I'm not aware of an 'off the shelf' retail solution... Hopefully someone else does. I think you'll need to have some DIY skills with hardware and software. Doing a quick search online, I came up with...
Forum: Help With Reception 17-Dec-2019, 2:27 PM
Replies: 5
Views: 615
Posted By GroundUrMast
Thanks for posting the additional prediction......

Thanks for posting the additional prediction... My estimate of you position was off target apparently. It looks as if rabbit73 did a better job. Please keep us informed on your progress.
Forum: Help With Reception 16-Dec-2019, 3:59 AM
Replies: 5
Views: 615
Posted By GroundUrMast
My previous estimate of your location may be...

My previous estimate of your location may be inadequate... It would be helpful if you could generate a signal prediction using the search tool at rabbitears.info,...
Forum: Help With Reception 15-Dec-2019, 11:49 PM
Replies: 5
Views: 615
Posted By GroundUrMast
You're correct, there is some potential for...

You're correct, there is some potential for co-channel interference... However it looks as if there is enough difference in signal levels (20 dB or more ) that it's reasonable to hope for reception...
Forum: Help With Reception 13-Dec-2019, 7:29 PM
Replies: 6
Views: 884
Posted By GroundUrMast
Are you willing to consider moving the antenna...

Are you willing to consider moving the antenna outside? You would likely see significant improvement in reception reliability. The roof structure hinders reception though the exact effect can vary...
Forum: Special Topics 11-Dec-2019, 10:42 PM
Replies: 5
Views: 1,560
Posted By GroundUrMast
A three director Yagi for CH-6

Here is a design generated using software by VK5DJ.

https://forum.tvfool.com/showthread.php?t=1106

https://forum.tvfool.com/attachment.php?attachmentid=3594&stc=1&d=1576104088

I've built a...
Forum: Help With Reception 18-Nov-2019, 9:59 PM
Replies: 34
Views: 4,847
Posted By GroundUrMast
If it's for actual frequency changes then you're...

If it's for actual frequency changes then you're seeing light at the end of the tunnel.:)
Forum: Antennas 10-Nov-2019, 1:38 AM
Replies: 41
Views: 10,082
Posted By GroundUrMast
Agreed; If this was a transmitting antenna you...

Agreed; If this was a transmitting antenna you would want to pay close attention to precise impedance matching so as to minimize power reflected back into the final amplifier stage of the...
Forum: Help With Reception 9-Nov-2019, 4:19 AM
Replies: 13
Views: 2,606
Posted By GroundUrMast
I ran a search at rabbitears.info using an...

I ran a search at rabbitears.info using an estimate of your location. The results I saw suggest you may need to mount as high as 60' AGL to obtain line-of-sight conditions which the ANT751 would do...
Forum: Enthusiast's Exchange 7-Nov-2019, 6:56 AM
Replies: 1
Views: 13,360
Posted By GroundUrMast
Using crontab for recurring recordings

I also use crontab to schedule recurring recordings. The following example represents my daily newscast recording schedule. I can watch a news cast until it is overwritten by the next scheduled...
Forum: Help With Reception 30-Oct-2019, 5:56 PM
Replies: 9
Views: 1,579
Posted By GroundUrMast
Doubling the antennas will in theory double the...

Doubling the antennas will in theory double the total received power... Expressed logarithmicly, that's 3dB. In practice you also have to consider loss in the cabling and combiner network as well as...
Forum: Help With Reception 29-Oct-2019, 8:51 PM
Replies: 9
Views: 1,579
Posted By GroundUrMast
You're doing remarkably well as is. I doubt that...

You're doing remarkably well as is. I doubt that quadrupling the height of your antennas or replacing them with custom built designs that added 10 dB of gain compared to what you already have would...
Forum: Enthusiast's Exchange 26-Oct-2019, 2:06 AM
Replies: 1
Views: 13,360
Posted By GroundUrMast
Personal Video Recorder (PVR) using SiliconDust tuner(s) and scripting on Linux

Edited 11/6/2019 - Updated Version of Script Code. Added locking feature to avoid race condition when two or more recordings begin at the same time.

I've tried several different Home Theater...
Forum: Help With Reception 25-Oct-2019, 8:16 AM
Replies: 15
Views: 2,765
Posted By GroundUrMast
Yes... If there is truly need for amplification,...

Yes... If there is truly need for amplification, placing the preamp as close as possible to the antenna will maximize the positive effects on the total system signal to noise ratio.
Forum: TV Fool Discussion / Database Updates 20-Oct-2019, 12:42 AM
Replies: 4
Views: 2,342
Posted By GroundUrMast
The majority of the Seattle market stations...

The majority of the Seattle market stations moving due to the repack are now up and operating on their post-repack frequencies.

The only exception that I can see as of now is KWDK which is still...
Forum: Help With Reception 11-Oct-2019, 1:18 AM
Replies: 9
Views: 1,862
Posted By GroundUrMast
Are any other channels effected?

Are any other channels effected?
Forum: TV Fool Discussion / Database Updates 4-Oct-2019, 11:29 PM
Replies: 4
Views: 2,342
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, 11:25 PM
Replies: 5
Views: 1,099
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, 5:54 PM
Replies: 5
Views: 1,099
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...
Showing results 1 to 25 of 500

 

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