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Search: Posts Made By: rabbit73
Forum: Antennas 5-Jan-2020, 7:56 PM
Replies: 112
Views: 150,655
Posted By rabbit73
This is what the original RCA ANT751 looks like: ...

This is what the original RCA ANT751 looks like:

http://forum.tvfool.com/attachment.php?attachmentid=2614&d=1492288273

This is what the RCA ANT7511 looks like:
...
Forum: Antennas 5-Jan-2020, 6:53 PM
Replies: 112
Views: 150,655
Posted By rabbit73
Here is an illustration of the shorting stubs...

Here is an illustration of the shorting stubs which M. J. Salvati calls an Isolation Network (see attachments):

http://forum.tvfool.com/attachment.php?attachmentid=2611&stc=1&d=1491963344

The...
Forum: Antennas 5-Jan-2020, 3:02 PM
Replies: 112
Views: 150,655
Posted By rabbit73
I really hate what RCA is doing with that...

I really hate what RCA is doing with that antenna. The original 751 was a good design, but they have messed with it so many times it's difficult to know what version will be in the box you buy. It...
Forum: Antennas 3-Feb-2019, 6:05 PM
Replies: 112
Views: 150,655
Posted By rabbit73
The attenuation loss is about the same for solid...

The attenuation loss is about the same for solid copper as it is for copper clad steel because the signals travel on the surface of the center conductor, which is called the "Skin Effect." The copper...
Forum: Antennas 3-Feb-2019, 2:17 AM
Replies: 112
Views: 150,655
Posted By rabbit73
Thank you for your kind words; you are welcome. ...

Thank you for your kind words; you are welcome.

The signals in your report are very strong, but your report assumes your antenna will be outside and in the clear. However, since your antenna will...
Forum: Antennas 25-Jun-2017, 3:04 PM
Replies: 112
Views: 150,655
Posted By rabbit73
http://forum.tvfool.com/attachment.php?attachmenti...

http://forum.tvfool.com/attachment.php?attachmentid=2761&stc=1&d=1498402788

The Tetrapole on the RCA ANT751R has two functions. First, it is the driven element (DE) for UHF signals. Second, it...
Forum: Antennas 6-Jun-2017, 1:23 PM
Replies: 112
Views: 150,655
Posted By rabbit73
Thank you for your encouraging comments. I also...

Thank you for your encouraging comments. I also learned a lot about indoor reception from this experiment.

Trip in VA, who runs the rabbitears.info web site and now works for the FCC, had an even...
Forum: Antennas 6-Jun-2017, 2:29 AM
Replies: 112
Views: 150,655
Posted By rabbit73
The Sadelco DislayMax 800 signal level meter...

The Sadelco DislayMax 800 signal level meter makes 43 measurements across the channel and diplays the average of all readings. If one of the 43 measurements is below -20 dBmV, the meter says "Ur" for...
Forum: Antennas 6-Jun-2017, 2:18 AM
Replies: 112
Views: 150,655
Posted By rabbit73
Since the convenient location for the antenna had...

Since the convenient location for the antenna had some problems, I tried other locations in the room. The best location for the signal was in the middle of the room in a high traffic area (of course...
Forum: Antennas 6-Jun-2017, 1:59 AM
Replies: 112
Views: 150,655
Posted By rabbit73
I suspected that multipath reflections were...

I suspected that multipath reflections were causing a problem and decided to add a reflector element to the VHF folded dipole. A cardboard box is used as a temporary support.
...
Forum: Antennas 6-Jun-2017, 1:41 AM
Replies: 112
Views: 150,655
Posted By rabbit73
I did some more testing with my GE 34792 Attic...

I did some more testing with my GE 34792 Attic Antenna indoors on VHF-High because CH 13 is more difficult to receive than my UHF channels.

I found a convenient location in the bedroom for the...
Forum: Antennas 31-May-2017, 7:13 PM
Replies: 112
Views: 150,655
Posted By rabbit73
Sending ticket number in a PM on other forum.

Sending ticket number in a PM on other forum.
Forum: Antennas 28-May-2017, 1:27 AM
Replies: 112
Views: 150,655
Posted By rabbit73
ADTech I bought two EU385CF for evaluation. I...

ADTech
I bought two EU385CF for evaluation. I opened the black enclosure, and something didn't look right. I opened the second enclosure and it did look right.

I was able to figure it out, but if...
Forum: Antennas 24-May-2017, 2:08 AM
Replies: 112
Views: 150,655
Posted By rabbit73
Not much difference; the DB2E was on sale. ...

Not much difference; the DB2E was on sale.
http://www.solidsignal.com/pview.asp?p=db2-e&d=antennas-direct-db2-e-db2e-multi-directional-bowtie-uhf-dtv-antenna-(db2-e)&sku=853748001408

Yes, you are...
Forum: Antennas 24-May-2017, 1:17 AM
Replies: 112
Views: 150,655
Posted By rabbit73
I did one final test in this indoor series, which...

I did one final test in this indoor series, which is to compare the GE Attic Antenna with the AD DB2E, using the GE Pro as a source antenna.

Comparison of GE Attic Antenna with Antennas Direct...
Forum: Antennas 21-May-2017, 1:24 AM
Replies: 112
Views: 150,655
Posted By rabbit73
The next test that I did was to compare the GE...

The next test that I did was to compare the GE PRO, ANT 751R, and the ANT 7511.

Relative Gain Comparison of three Antennas

Channel GE PRO RCA RCA
29884 ANT751R ANT7511...
Forum: Antennas 21-May-2017, 12:28 AM
Replies: 112
Views: 150,655
Posted By rabbit73
Kent writes an antenna column for CQ Magazine...

Kent writes an antenna column for CQ Magazine (amateur radio). He is the creator of the "Cheap Yagi" antenna. If you Google it:
https://www.google.com/#q=cheap+yagi&spf=1495326554715

This is his...
Forum: Antennas 20-May-2017, 6:30 PM
Replies: 112
Views: 150,655
Posted By rabbit73
The tests that I have made so far tell how well...

The tests that I have made so far tell how well the antennas work indoors with my signals, but I have been searching for a test method that would give a more accurate indication of relative antenna...
Forum: Antennas 5-May-2017, 5:30 PM
Replies: 112
Views: 150,655
Posted By rabbit73
Inside the GE 34792 Attic Antenna

Well, here it is:

http://forum.tvfool.com/attachment.php?attachmentid=2639&stc=1&d=1494003938

http://forum.tvfool.com/attachment.php?attachmentid=2640&stc=1&d=1494003938

I have used the...
Forum: Antennas 2-May-2017, 2:37 AM
Replies: 112
Views: 150,655
Posted By rabbit73
Found the 29884 video; thanks. ...

Found the 29884 video; thanks.
https://www.youtube.com/watch?v=R_XAO14gSms
Forum: Antennas 2-May-2017, 1:45 AM
Replies: 112
Views: 150,655
Posted By rabbit73
Thanks; I didn't know about that. Is it the GE...

Thanks; I didn't know about that. Is it the GE 29884 Pro Outdoor/Attic Mount Antenna? Click on Outdoor 70 mile version:

https://www.amazon.com/GE-33692-Attic-Mount-Antenna/dp/B00DNJZ58M?th=1
...
Forum: Antennas 1-May-2017, 2:45 PM
Replies: 112
Views: 150,655
Posted By rabbit73
I found an RCA ANT751R on ebay with free...

I found an RCA ANT751R on ebay with free shipping. The seller showed a photo of the long unopened box, so I was fairly certain it would be the original. It was the original when it arrived, and he...
Forum: Antennas 29-Apr-2017, 12:38 AM
Replies: 112
Views: 150,655
Posted By rabbit73
Thanks for your kind words; glad you enjoyed it....

Thanks for your kind words; glad you enjoyed it. It was an interesting project for me, because many people can only have an indoor antenna.

Now I'm wondering how a 751 would compare with a 7511.:)
Forum: Antennas 28-Apr-2017, 10:45 PM
Replies: 112
Views: 150,655
Posted By rabbit73
http://forum.tvfool.com/attachment.php?attachmenti...

http://forum.tvfool.com/attachment.php?attachmentid=2635&stc=1&d=1493419398

The GE antenna is much better on channel 16, and a little better on 29, than the RCA ANT7511 (at this location). The RCA...
Forum: Antennas 28-Apr-2017, 7:16 PM
Replies: 112
Views: 150,655
Posted By rabbit73
I made some measurements indoors to compare the...

I made some measurements indoors to compare the GE 34792 Attic Antenna with the RCA ANT7511 Antenna. They are not exactly antenna test range measurements that an engineer would do, and they are not...
Showing results 1 to 25 of 36

 

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