TV Fool  

Go Back   TV Fool > Search Forums

Notices

Showing results 351 to 375 of 500
Search took 0.04 seconds; generated 78 minute(s) ago.
Search: Posts Made By: rabbit73
Forum: Help With Reception 25-Apr-2019, 6:57 PM
Replies: 153
Views: 3,158,618
Posted By rabbit73
If it is running at reduced power now to work on...

If it is running at reduced power now to work on the new channel 20 antenna, you should see some improvement. If it is not running at reduced power now, your reception will be about the same.

The...
Forum: Help With Reception 25-Apr-2019, 3:11 PM
Replies: 153
Views: 3,158,618
Posted By rabbit73
Thank you for the update with your report of...

Thank you for the update with your report of improved reception.

Your current TVFool report doesn't list WPGH because of database errors used to generate the report.
...
Forum: Help With Reception 24-Apr-2019, 7:20 PM
Replies: 13
Views: 28,589
Posted By rabbit73
Another interesting tower story: ...

Another interesting tower story:

TVTechnology
It’s the Repack—Scoot Over!
A look at a repack project from a TV engineer's perspective.
By John Marcon
Apr 22, 2019...
Forum: Help With Reception 22-Apr-2019, 10:29 PM
Replies: 13
Views: 28,589
Posted By rabbit73
Thank you for the details. I felt the warming...

Thank you for the details. I felt the warming when I was too close to my 14 MHz mobile antenna at 100W.
Forum: Help With Reception 22-Apr-2019, 8:09 PM
Replies: 13
Views: 28,589
Posted By rabbit73
Neat! Thank you. How much RF exposure...

Neat!

Thank you.

How much RF exposure can the workers tolerate without harm?
Forum: Help With Reception 22-Apr-2019, 11:31 AM
Replies: 13
Views: 28,589
Posted By rabbit73
Hello, BigLou80; welcome to the forum. Thank...

Hello, BigLou80; welcome to the forum.

Thank you for the link to your signal report.

Yes, WGGB and WGBY are strong enough to cause overload; you can't use a preamp.

WTIC is moving from real...
Forum: Help With Reception 19-Apr-2019, 3:16 PM
Replies: 153
Views: 3,158,618
Posted By rabbit73
Thank you, Bob, Tim, and jrgagne99.

Thank you, Bob, Tim, and jrgagne99.
Forum: Antennas 18-Apr-2019, 10:45 PM
Replies: 6
Views: 23,410
Posted By rabbit73
First power, then signal. The spikes from...

First power, then signal.

The spikes from nearby EMP or static discharge would take out the first LNA IC.

In the Winegard LNA200, it would most likely be Q2 even though it has 2 transient...
Forum: Antennas 18-Apr-2019, 8:39 PM
Replies: 6
Views: 23,410
Posted By rabbit73
There is no basic troubleshooting guide for the...

There is no basic troubleshooting guide for the electronics in preamps.
Even if you found a bad part, could you remove and replace a tiny surface mount component?

There are external tests you...
Forum: Help With Reception 17-Apr-2019, 3:55 PM
Replies: 153
Views: 3,158,618
Posted By rabbit73
Don't give them all away, keep a few as spares. ...

Don't give them all away, keep a few as spares.

Good luck.
Forum: Help With Reception 17-Apr-2019, 2:35 PM
Replies: 153
Views: 3,158,618
Posted By rabbit73
That is a UVSJ (UHF/VHF Separator-Joiner), which...

That is a UVSJ (UHF/VHF Separator-Joiner), which is also called a diplexer or UHF/VHF combiner. You can use it after the power inserter for the UHF PA18 or after the two power inserters for two...
Forum: Help With Reception 15-Apr-2019, 8:34 PM
Replies: 35
Views: 61,225
Posted By rabbit73
There are a lot of different models of the...

There are a lot of different models of the Johansson preamp.
preamplifiers, scroll down:
https://unitrongroup.com/en/products/CAT/AMP/APRE.html

preamplifiers and kits, scroll down:...
Forum: Help With Reception 15-Apr-2019, 3:15 PM
Replies: 153
Views: 3,158,618
Posted By rabbit73
Tim's revised diagram shows the UVSJ after the...

Tim's revised diagram shows the UVSJ after the preamps, but it does not show the power inserter for the PA18 or how the LNA100 gets power.
Forum: Help With Reception 15-Apr-2019, 1:08 AM
Replies: 153
Views: 3,158,618
Posted By rabbit73
The LNA200 uses a power inserter, but the LNA100...

The LNA200 uses a power inserter, but the LNA100 does not use a power inserter. The USB power for the LNA100 goes directly into a connector on the amp housing....
Forum: Help With Reception 14-Apr-2019, 7:00 PM
Replies: 35
Views: 61,225
Posted By rabbit73
Thank you for the encouraging report on WYJJ....

Thank you for the encouraging report on WYJJ. Glad we were able to help.

Best regards,
rabbit
Forum: Help With Reception 14-Apr-2019, 2:26 PM
Replies: 35
Views: 61,225
Posted By rabbit73
https://forum.tvfool.com/attachment.php?attachment...

https://forum.tvfool.com/attachment.php?attachmentid=3374&d=1555250014

The chance of it working is poor but not impossible. It's just another way of combining two UHF antennas aimed in different...
Forum: Antennas 14-Apr-2019, 2:14 AM
Replies: 30
Views: 68,998
Posted By rabbit73
rabbitears.info shows K03FB on the air: ...

rabbitears.info shows K03FB on the air:
https://rabbitears.info//market.php?request=station_search&callsign=K03FB

Either it isn't on the air or you have a high noise level on CH3.

I suggest...
Forum: Antennas 13-Apr-2019, 6:08 PM
Replies: 18
Views: 126,387
Posted By rabbit73
Norton blocked that link for me; said it was...

Norton blocked that link for me; said it was dangerous......might have been interesting.

OK, I was able to read the Google cache. Extract here:

NOISE TEMPERATURE, NOISE FACTOR and NOISE FIGURE...
Forum: Help With Reception 13-Apr-2019, 3:16 PM
Replies: 35
Views: 61,225
Posted By rabbit73
To me, all antennas are beautiful; they are...

To me, all antennas are beautiful; they are magic.

https://forum.tvfool.com/attachment.php?attachmentid=3367&d=1555169979
Forum: Antennas 13-Apr-2019, 3:03 PM
Replies: 18
Views: 126,387
Posted By rabbit73
Measuring the noise figure of a preamp is not...

Measuring the noise figure of a preamp is not easily done; I don't have the proper equipment to do it accurately. It requires an expensive calibrated noise source. I depend upon the measurements done...
Forum: Help With Reception 13-Apr-2019, 2:25 AM
Replies: 35
Views: 61,225
Posted By rabbit73
I bought two RCA TVPRAMP1R preamps in sealed...

I bought two RCA TVPRAMP1R preamps in sealed boxes; both failed. I can't recommend a preamp with such poor quality control. The Antennas Direct Juice is more reliable and you can add a UVSJ if you...
Forum: Help With Reception 13-Apr-2019, 2:04 AM
Replies: 7
Views: 22,500
Posted By rabbit73
It's your choice. Chicago channel changes...

It's your choice.

Chicago channel changes indicated by arrows:
https://www.rabbitears.info/market.php?request=station_search&callsign=WBBM

Repack Plan for Chicago:...
Forum: Help With Reception 13-Apr-2019, 1:44 AM
Replies: 7
Views: 22,500
Posted By rabbit73
https://forum.tvfool.com/attachment.php?attachment...

https://forum.tvfool.com/attachment.php?attachmentid=3365&d=1555120937

https://forum.tvfool.com/attachment.php?attachmentid=3364&d=1555120582

Good test.
WBBM is one of your weaker Chicago...
Forum: Help With Reception 13-Apr-2019, 12:02 AM
Replies: 7
Views: 22,500
Posted By rabbit73
Your report links don't work. You did a copy and...

Your report links don't work. You did a copy and paste from the other thread, so the centers of the links are missing. Try these:...
Forum: Help With Reception 12-Apr-2019, 3:30 PM
Replies: 35
Views: 61,225
Posted By rabbit73
Thank you for making the interesting test. ...

Thank you for making the interesting test.
The general rule is the higher, the better, but when the signals are scattered by an obstruction, the wavefront is not uniform and there will be hot...
Showing results 351 to 375 of 500

 

All times are GMT. The time now is 5:30 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2026, vBulletin Solutions Inc.
Copyright © TV Fool, LLC