Forum: Antennas
30-Jun-2013, 7:37 PM
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Replies: 53
Views: 286,527
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Forum: Antennas
25-Jun-2013, 1:52 PM
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Replies: 121
Views: 1,170,893
Balun
Thanks Pete.
Yes, a CM-0264 was physically modified to remove the internal balun and replace it with an internal coaxial half-wave loop balun.
Two types of lab tests were performed:
...
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Forum: Antennas
22-Jun-2013, 5:18 PM
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Replies: 121
Views: 1,170,893
Custom Corner Reflector
The Channel Master 8-bay (http://forum.tvfool.com/showpost.php?p=36689&postcount=20) coupled through a CM-7777 and a Join-tenna provided reliable reception of WCTE-22 (~ 65 miles distant in...
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Forum: Antennas
17-Jun-2013, 12:07 AM
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Replies: 53
Views: 286,527
Thanks Pete for your interesting PM.
You may...
Thanks Pete for your interesting PM.
You may post images that will automatically open for the reader by using the BBcode .
Place the following in the post where you want the image to appear.
...
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Forum: Antennas
16-Jun-2013, 6:46 PM
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Replies: 53
Views: 286,527
Combiner Effect - Signal & Noise (above kTB)
Referring to hybrid combiner in earlier post (http://forum.tvfool.com/showpost.php?p=36774&postcount=21):
A hybrid splitter/combiner schematic may look something like this schematic from...
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Forum: Antennas
16-Jun-2013, 4:57 PM
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Replies: 53
Views: 286,527
Tradeoff Gain as Example
Yes, but :)
There are tradeoffs. Some mentioned earlier, but not every detail.
Depends on objectives.
An example:
If the two antennas (either alike or different) are receiving...
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Forum: Antennas
14-Jun-2013, 1:58 PM
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Replies: 121
Views: 1,170,893
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Forum: Antennas
13-Jun-2013, 2:16 PM
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Replies: 121
Views: 1,170,893
Longer Reinforced Mast
If higher gain antennas were to occupy the top position on the tower, then a taller mast may be required. For maximum stacking gain, individual antennas with higher gain require increased stack...
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Forum: Antennas
10-Jun-2013, 4:53 PM
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Replies: 53
Views: 286,527
Loss of Gain of S/N, Combining Two Antenna
Thanks Pete, for testing this feature. I’m sure that you know this:
There are at least three fundamentally different ways of combining all channels from two antennas. Each involves two or...
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Forum: Antennas
6-Jun-2013, 9:47 AM
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Replies: 121
Views: 1,170,893
Jerrold/Wade VIP-306 for VHF-11
Previously mentioned was that the stacked YA-1713’s on the main tower (http://forum.tvfool.com/showpost.php?p=36658&postcount=19) were not much use after WKYT moved from Channel 13 to Channel 36. ...
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Forum: Antennas
6-Jun-2013, 9:35 AM
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Replies: 53
Views: 286,527
HDB8X 8-Bay Bow Tie Antenna
Thanks Pete, for your assessment of the 8-bay construction.
The length of the elements seems encouraging. That 8 inch length is comparable to the 'original' CM-4228, so the antenna should have...
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Forum: Antennas
2-Jun-2013, 12:15 AM
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Replies: 121
Views: 1,170,893
Yes Pete, it appears so.
Since your...
Yes Pete, it appears so.
Since your comment, I looked at a 1973 Channel Master catalog, it shows the 4228 as is commonly known. So, guess the design change occurred before 1973.
Some of the...
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Forum: Antennas
1-Jun-2013, 5:13 PM
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Replies: 121
Views: 1,170,893
Early Channel Master 8-bay
The following image shows an 8-bay antenna that was purchased in 1970. Pretty sure it is Channel Master, probably a precedent to the popular ’original’ CM-4228. The physical dimensions and...
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Forum: Antennas
26-May-2013, 12:44 PM
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Replies: 121
Views: 1,170,893
Tower & Vertically Stacked YA-1713's
Pete, you have an extensive cabling arrangement.
Your idea of swapping antenna positions is a good one. Vertical signal layering can cause a substantial signal strength variation over relatively...
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Forum: Antennas
24-May-2013, 1:38 PM
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Replies: 121
Views: 1,170,893
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Forum: Antennas
23-May-2013, 6:42 PM
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Replies: 121
Views: 1,170,893
Tower & CM-1110
Pete, have been out of town for a while. Was actually in KY at the main antenna test location, and climbed above the top of the tower a few times. Above the top, to be explained later. :)
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Forum: Antennas
16-Apr-2013, 1:45 PM
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Replies: 121
Views: 1,170,893
High Dynamic Range
Initial thought:
You cannot receive Channel 43 very well because it isn’t there (that is; in the TVfool table)! :)
Then, after eliminating analog channels from the table, channel 43 shows.
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Forum: Antennas
15-Apr-2013, 5:05 PM
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Replies: 121
Views: 1,170,893
Mid 1960's VHF Antenna, FinCo CS-V10
The vintage antenna (previous post) (http://forum.tvfool.com/showpost.php?p=36192&postcount=8) is a Finco CS-V10.
http://forum.tvfool.com/attachment.php?attachmentid=510&d=1366051673
The image...
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Forum: Antennas
15-Apr-2013, 4:45 PM
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Replies: 121
Views: 1,170,893
Yes, hope you can find such. Was the CM-4251...
Yes, hope you can find such. Was the CM-4251 popular in California?
You have some nice antennas.
Interesting that you have found such a difference between the antennas. As you probably...
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Forum: Antennas
13-Apr-2013, 6:27 PM
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Replies: 121
Views: 1,170,893
Mid 1960's VHF Antenna
No intention to divert from other antennas and tests, or other related.
Took down an antenna this morning and thought it (or the story) may be interesting to someone.
It's a Log-V antenna,...
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Forum: Antennas
11-Apr-2013, 3:55 PM
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Replies: 121
Views: 1,170,893
Very interesting.
That was a good idea to...
Very interesting.
That was a good idea to contact Antennacraft. Maybe we can learn something from it. Curious as to what Antennacraft's response will be.
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Pete,...
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Forum: Antennas
4-Apr-2013, 4:43 PM
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Replies: 121
Views: 1,170,893
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Forum: Antennas
2-Apr-2013, 5:25 PM
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Replies: 121
Views: 1,170,893
Some Antenna Photos and Tests
Tests were conducted in 2011 to evaluate performance of some TV antennas.
The tests involved a signal source feeding a CM-4228 at ~45 ft AGL radiating to antenna under test located ~150 feet...
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Forum: Enthusiast's Exchange
26-Mar-2013, 3:27 PM
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Replies: 2
Views: 40,799
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Forum: TV Database Updates
29-Dec-2012, 1:49 PM
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Replies: 0
Views: 15,404
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