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Forum: Antennas

30-Jun-2017, 1:52 AM

Replies: 22

Antenna design

Views: 46,108

Posted By dbseeker

Appreciate GroundUR Mast for posting the 4NEC2 ...

Appreciate GroundUR Mast for posting the 4NEC2 simulation of proposed design.
Since my math and physics background is 40 years old and dead brain cells in between,
what parameters in the...

Forum: Antennas

26-Mar-2017, 11:57 PM

Replies: 22

Antenna design

Views: 46,108

Posted By dbseeker

As always, the expertise here is superb. I will...

As always, the expertise here is superb. I will keep trying to wade through the antenna book. Like throwing mud up on a wall, eventually it will start sticking.
Thanks again!!

Forum: Antennas

26-Mar-2017, 1:19 AM

Replies: 22

Antenna design

Views: 46,108

Posted By dbseeker

Please tolerate a question or two about...

Please tolerate a question or two about reflectors. Optimum reflector for UHF antenna is 3 inches to add close to 3 db of gain according to what I can ascertain from this forum and HDTV primer. Is it...

Forum: Antennas

24-Sep-2015, 11:48 PM

Replies: 22

Antenna design

Views: 46,108

Posted By dbseeker

For grins, I thought I would try to navigate the...

For grins, I thought I would try to navigate the software simulators although not sure what I would encounter. Do maybe 5 repetitions and 10 and 15 or if too difficult--just forget it all and go to...

Forum: Antennas

24-Sep-2015, 6:39 PM

Replies: 22

Antenna design

Views: 46,108

Posted By dbseeker

Label A is 3 Inches ...

Label A is 3 Inches
http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3d8e03b729885895

Forum: Antennas

24-Sep-2015, 6:30 PM

Replies: 22

Antenna design

Views: 46,108

Posted By dbseeker

Please find attached pic of the antenna in the...

Please find attached pic of the antenna in the attic. Actually made of aluminum wire and certainly not made with extreme tolerances. Each vertical distances and gaps are all 3 inches. Other than the...

Forum: Antennas

24-Sep-2015, 2:30 AM

Replies: 22

Antenna design

Views: 46,108

Posted By dbseeker

thanks for the replies!! Was able to order to...

thanks for the replies!!
Was able to order to order the handbook through Amazon used for $32 including shipping.
Please pardon the crude, kindergarten sketch done hastily but may give you a flavor...

Forum: Antennas

23-Sep-2015, 2:05 AM

Replies: 22

Antenna design

Views: 46,108

Posted By dbseeker

thank you for all the replies!! Size is the...

thank you for all the replies!!
Size is the inverse of frequency hence the size of the VHF-hi GH evidenced by the photo.
Optimum director diameter is determined by cost/mechanical load and...

Forum: Antennas

22-Sep-2015, 3:59 AM

Replies: 22

Antenna design

Views: 46,108

Posted By dbseeker

Additional questions-- What determines optimum...

Additional questions-- What determines optimum director diameter and how was that derived?
When ganging antennas for additional gain, the second adds an additional 2.5 to 3 db of gain. So does it...

Forum: Antennas

21-Sep-2015, 8:26 PM

Replies: 22

Antenna design

Views: 46,108

Posted By dbseeker

Antenna design

As you may know from previous posts, I am not an engineer but have had basic physics courses and got interested in antennas and reception with the digital switch.
It would appear to this novice that...

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