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Forum: HDTV Technical   11-18-2014, 11:01 AM
Replies: 22
Views: 1,753
Posted By rabbit73
The RS UVSJ UHF/VHF combiner (diplexer) can be...

The RS UVSJ UHF/VHF combiner (diplexer) can be used instead of a grounding block. That is why the screw is there.

But, connecting it to a separate ground rod below the mast would satisfy the...
Forum: Post Testing Area   11-16-2014, 03:48 PM
Replies: 0
Views: 168
Posted By rabbit73
Image test

It looks like this:
Forum: HDTV Technical   11-15-2014, 07:44 PM
Replies: 12
Views: 255
Posted By rabbit73
What happens if you make a temporary test setup...

What happens if you make a temporary test setup of the Antennacraft HBU22 outside with no preamp and a known good length of coax connected to the TV?
Forum: HDTV Technical   11-08-2014, 01:07 PM
Replies: 4
Views: 511
Posted By rabbit73
Try an unamplified indoor antenna first. The best...

Try an unamplified indoor antenna first. The best location for it would be inside a window that faces south, no metal screen.

Sometimes it is necessary to try different locations for an indoor...
Forum: HDTV Technical   11-07-2014, 07:20 PM
Replies: 4
Views: 511
Posted By rabbit73
Welcome, postal code M1K 5J3 is...

Welcome,

postal code M1K 5J3 is Scarborough, ON

a generic tvfool report:
http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3dd2436eda720191

I used 100 ft because you are on the...
Forum: HDTV Technical   11-03-2014, 11:58 PM
Replies: 18
Views: 654
Posted By rabbit73
How weak is quite weak? I'm wondering if...

How weak is quite weak?

I'm wondering if cheesepizzacheese understands that we can't help him if he doesn't give us a tvfool report for his location.

And I'm wondering if cheesepizzacheese...
Forum: HDTV Technical   10-31-2014, 09:40 PM
Replies: 19
Views: 941
Posted By rabbit73
No, it's all done in the antenna. The...

No, it's all done in the antenna.

The antenna will correctly receive and send to your tuner, one full 360 degree wave, or two, or as many as are transmitted because the crossover allows the sum...
Forum: HDTV Technical   10-31-2014, 08:51 PM
Replies: 14
Views: 430
Posted By rabbit73
That looks better, but you entered HI as your...

That looks better, but you entered HI as your state.

Maybe we should use the previous one to be conservative when picking an antenna. There are many to choose from, and I would like some of the...
Forum: HDTV Technical   10-31-2014, 08:20 PM
Replies: 14
Views: 430
Posted By rabbit73
Probably so, or a very big one in the attic....

Probably so, or a very big one in the attic. Signal loss from being in the attic is difficult to predict.

You will need an antenna for UHF and VHF-high aimed at about 30 degrees magnetic. You...
Forum: HDTV Technical   10-31-2014, 07:58 PM
Replies: 14
Views: 430
Posted By rabbit73
You only have one green signal at the top, WSB...

You only have one green signal at the top, WSB real channel 17.
WXIA-DT real channel 10 down through WJSP-DT 23 are yellow.
WBPA-DT 21 down through WATC-DT are red.
The rest are grey.
Forum: HDTV Technical   10-31-2014, 07:26 PM
Replies: 14
Views: 430
Posted By rabbit73
When I added another w at the beginning of the...

When I added another w at the beginning of the link in your first post, and closed up the space between the 7 and the 9 at the end, I got a report for Newman:...
Forum: HDTV Technical   10-30-2014, 08:55 PM
Replies: 19
Views: 941
Posted By rabbit73
I noticed from the source of your antenna...

I noticed from the source of your antenna diagram, which is more professional-looking than mine, you have a website with some interesting experiments:
http://www.xmanproject.com/

And you also...
Forum: HDTV Technical   10-28-2014, 07:09 PM
Replies: 19
Views: 941
Posted By rabbit73
You have made an intelligent observation. I also...

You have made an intelligent observation. I also had thought about that time difference, and wondered why it didn't keep the antenna from working. This is the reason why it works:

Consider the...
Forum: HDTV Technical   10-28-2014, 06:01 PM
Replies: 2
Views: 269
Posted By rabbit73
Welcome Layf Swan: A generic tvfool report...

Welcome Layf Swan:

A generic tvfool report for Matteson, IL looks like this:
http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3dd2431e69972a12
...
Forum: HDTV Technical   10-27-2014, 11:46 PM
Replies: 19
Views: 941
Posted By rabbit73
It is true that there is a time difference...

It is true that there is a time difference between the bays, but it doesn't seem to matter because it works. Or, more exactly, it works because of the time difference.

The purpose of the phasing...
Forum: HDTV Technical   10-27-2014, 11:40 PM
Replies: 19
Views: 941
Posted By rabbit73
Hi speak: The popular 4-Bay antenna...

Hi speak:

The popular 4-Bay antenna consists of 4 full-wave dipoles, not 4 half-wave dipoles. Full-wave dipoles are also known as collinear pairs, because they consist of 2 half-wave dipoles...
Forum: HDTV Technical   10-26-2014, 07:24 PM
Replies: 54
Views: 1,391
Posted By rabbit73
jazzdj: Thanks for redoing your tvfool...

jazzdj:

Thanks for redoing your tvfool report. It looks more like the one that I did for Trabuco Canyon based on the Wiki coordinates....
Forum: HDTV Technical   10-26-2014, 06:52 PM
Replies: 54
Views: 1,391
Posted By rabbit73
I don't have his exact address, so all I can do...

I don't have his exact address, so all I can do is make an estimate for his FM report using the coordinates from Wiki for Trabuco Canyon.
Forum: HDTV Technical   10-26-2014, 12:25 PM
Replies: 54
Views: 1,391
Posted By rabbit73
jazzdj: Thank you for doing your tvfool...

jazzdj:

Thank you for doing your tvfool report; it's a good start.

You have some of the best experienced experts in the country here, willing and able to give you free help with your OTA...
Forum: HDTV Technical   10-25-2014, 08:15 PM
Replies: 54
Views: 1,391
Posted By rabbit73
How many channels do you get if you connect the...

How many channels do you get if you connect the unpowered Philips antenna directly to a TV?

How many channels do you get if you connect your modified DB2 + Dipole antenna directly to a TV?
...
Forum: HDTV Technical   10-25-2014, 06:27 PM
Replies: 54
Views: 1,391
Posted By rabbit73
Good. I had to ask to be sure; you seemed...

Good.

I had to ask to be sure; you seemed to be using the meter to the exclusion of any other method for troubleshooting.

No offense meant; we are trying to help you.

I have been a ham...
Forum: HDTV Technical   10-25-2014, 10:50 AM
Replies: 54
Views: 1,391
Posted By rabbit73
jazzdj: When testing a cable with an...

jazzdj:

When testing a cable with an ohmmeter, the cable must not be connected to any equipment. If it is connected, your results at best might be inconclusive or misleading; at worst, the...
Forum: HDTV Technical   10-24-2014, 10:56 PM
Replies: 54
Views: 1,391
Posted By rabbit73
You are trying to troubleshoot the whole system...

You are trying to troubleshoot the whole system at once.

Divide and conquer.

You need to isolate the problem to one part of the system.

I repeat:

What you need to do is called...
Forum: HDTV Technical   10-24-2014, 07:54 PM
Replies: 54
Views: 1,391
Posted By rabbit73
Where was the other end of the coax connected? ...

Where was the other end of the coax connected?
Open, because there is a series capacitor in the inserter that passes the signals to the TV but blocks the DC power from getting into the TV. Your...
Forum: HDTV Technical   10-23-2014, 08:06 PM
Replies: 54
Views: 1,391
Posted By rabbit73
Correct Good analysis of System Noise...

Correct

Good analysis of System Noise Figure, Chuck.
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