Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1   Report Post  
Old December 2nd 13, 12:21 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 702
Default Turning a 1/4 wave vertical upside down


"amdx" wrote in message
...
The receive area is small, 120" x 115", the antenna will be mounted 13"
in from the long dimension and 16" in from the smaller dimension,
basically in the corner of the lot, mounted 16 ft high.

Jeff, at this point, I have convinced myself putting a gain antenna on
the roof will solve any problem I may have. If not I can still remove 6db
of attenuation. So unless you want some mental exercise, don't over do it!

I am sure you mean feet ' instead of inches ". Without doing the math, I
would think that 150 feet would be the most you would need out of the
system. What is wrong with a horizontal dipole ? It should cover the area
just fine, and if not take out those attuenuators. I am not up on all the
part 15 rules, but I was thinking 100 milliwatts was fine to run. If you
can't hear it 200 feet away, I doubt the FCC is going to worry about it with
all the other things they have going on.

Could that buzzing noise you hear be some other signal such as cable leakage
or the AC power lines line noise ?


  #2   Report Post  
Old December 2nd 13, 02:08 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Aug 2013
Posts: 154
Default Turning a 1/4 wave vertical upside down

On 12/1/2013 6:21 PM, Ralph Mowery wrote:

"amdx" wrote in message
...
The receive area is small, 120" x 115", the antenna will be mounted 13"
in from the long dimension and 16" in from the smaller dimension,
basically in the corner of the lot, mounted 16 ft high.

Jeff, at this point, I have convinced myself putting a gain antenna on
the roof will solve any problem I may have. If not I can still remove 6db
of attenuation. So unless you want some mental exercise, don't over do it!

I am sure you mean feet ' instead of inches ". Without doing the math, I
would think that 150 feet would be the most you would need out of the
system. What is wrong with a horizontal dipole ? It should cover the area
just fine, and if not take out those attuenuators. I am not up on all the
part 15 rules, but I was thinking 100 milliwatts was fine to run. If you
can't hear it 200 feet away, I doubt the FCC is going to worry about it with
all the other things they have going on.


I don't think so either, I just want to do the job with minimum power.
Now that I've messed with the new 110 Mhz filter a bit, I might remove
one 3 db attenuator and see how it works around the yard.

Could that buzzing noise you hear be some other signal such as cable leakage
or the AC power lines line noise ?


I think it's 60 hertz or a harmonic, but with enough RF, I don't think
I'd hear it.
It seemed better, after I added my LPF, I don't think because of the
filtering but maybe impedance changes.

Mikek

  #3   Report Post  
Old December 2nd 13, 04:43 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jun 2007
Posts: 1,336
Default Turning a 1/4 wave vertical upside down

On Sun, 1 Dec 2013 19:21:19 -0500, "Ralph Mowery"
wrote:

Could that buzzing noise you hear be some other signal such as cable leakage
or the AC power lines line noise ?


Trivia: Cable leakage has changed over the last few years. The sync
buzz of the analog TV era has been replaced by digital hiss. Put a
temporary antenna on your cable connection and listen on a suitable
receiver. Some cable systems still carry FM broadcast stations, so he
might also be hearing those coming from a cable leak. Locally,
everything was moved to digital channels in 2005.
http://www.sfgate.com/business/article/Comcast-to-restore-30-FM-radio-stations-Some-2625920.php

"Any sufficiently advanced communications technology is
indistiguishable from noise" (appologies to Arthur C. Clarke).

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
  #4   Report Post  
Old December 2nd 13, 05:00 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 702
Default Turning a 1/4 wave vertical upside down


"Jeff Liebermann" wrote in message
Trivia: Cable leakage has changed over the last few years. The sync
buzz of the analog TV era has been replaced by digital hiss. Put a
temporary antenna on your cable connection and listen on a suitable
receiver. Some cable systems still carry FM broadcast stations, so he
might also be hearing those coming from a cable leak. Locally,
everything was moved to digital channels in 2005.
http://www.sfgate.com/business/article/Comcast-to-restore-30-FM-radio-stations-Some-2625920.php


I guess it depends on where you are Jeff. Around where I live there about
100 channels that are still analog. Still starting at the old channel 2.

The state I live in is still way behind times.


  #5   Report Post  
Old December 2nd 13, 06:39 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jun 2007
Posts: 1,336
Default Turning a 1/4 wave vertical upside down

On Mon, 2 Dec 2013 00:00:37 -0500, "Ralph Mowery"
wrote:

"Jeff Liebermann" wrote in message
Trivia: Cable leakage has changed over the last few years. The sync
buzz of the analog TV era has been replaced by digital hiss. Put a
temporary antenna on your cable connection and listen on a suitable
receiver. Some cable systems still carry FM broadcast stations, so he
might also be hearing those coming from a cable leak. Locally,
everything was moved to digital channels in 2005.
http://www.sfgate.com/business/article/Comcast-to-restore-30-FM-radio-stations-Some-2625920.php


I guess it depends on where you are Jeff. Around where I live there about
100 channels that are still analog. Still starting at the old channel 2.


Comcast is now all digital in the People's Republic of Santa Cruz CA.
Of course Comcast has a new scam. You get up to two "free" DTA boxes:
http://customer.comcast.com/Pages/FAQViewer.aspx?seoid=What-is-a-digital-adapter
for listening to FM and viewing non-HD channels. It was originally
announced that it was "free" for 2 years, but Comcast started adding
$5/month per box to some peoples bills in about June.

One problem is that the DTA box somehow manages to produce worse than
analog quality TV pictures. Digital in, garbage out. I don't know
how they managed it, but the "free" box produces some of the worst
looking pictures I have ever seen since the introduction of color TV.
The Comcast solution is to rent a similar box, that produces HD video,
and amazingly produces decent looking non-HD video for $10/month.
That's $120/year per TV set for what used to be free:
http://bgr.com/2013/10/16/comcast-digital-adapter-criticism/
https://www.google.com/search?q=comcast+dta&tbm=isch
Oddly, both types of DTA boxes use the same digital data for non-HD
stations, so it's not Comcast that's sending garbage video. It's the
DTA box.

Both types of boxes will play some local FM stations, but I've only
tried it on the HD version. Works fine but will vary by area. For
Santa Cruz, we get about 30 stations.

The state I live in is still way behind times.


That may not be such a bad thing.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558


  #6   Report Post  
Old December 4th 13, 04:37 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 702
Default Turning a 1/4 wave vertical upside down


"Jeff Liebermann" wrote in message
...
Comcast is now all digital in the People's Republic of Santa Cruz CA.
Of course Comcast has a new scam. You get up to two "free" DTA boxes:
http://customer.comcast.com/Pages/FAQViewer.aspx?seoid=What-is-a-digital-adapter
for listening to FM and viewing non-HD channels. It was originally
announced that it was "free" for 2 years, but Comcast started adding
$5/month per box to some peoples bills in about June.

One problem is that the DTA box somehow manages to produce worse than
analog quality TV pictures. Digital in, garbage out. I don't know
how they managed it, but the "free" box produces some of the worst
looking pictures I have ever seen since the introduction of color TV.
The Comcast solution is to rent a similar box, that produces HD video,
and amazingly produces decent looking non-HD video for $10/month.
That's $120/year per TV set for what used to be free:
http://bgr.com/2013/10/16/comcast-digital-adapter-criticism/
https://www.google.com/search?q=comcast+dta&tbm=isch
Oddly, both types of DTA boxes use the same digital data for non-HD
stations, so it's not Comcast that's sending garbage video. It's the
DTA box.



I have an old cable ready TV that gets close to 100 of the analog chanels.
Just to see if it would work, I hooked up one of the off the air digital
converter boxes up to the cable an it did not pick up anything. Guess that
lets that out if our area goes to all digital.

A newer TV gets the analog and digital chanels off the cable. Then I have
one of the boxes hooked to the main TV.. If my wife could operate things, I
would go to something like Netflix.

The box does work off the air and I get about 30 chanels off the air with an
antenna out side the house.


  #7   Report Post  
Old December 16th 13, 07:43 AM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Jun 2007
Posts: 1,336
Default Turning a 1/4 wave vertical upside down

On Tue, 3 Dec 2013 23:37:43 -0500, "Ralph Mowery"
wrote:

A newer TV gets the analog and digital chanels off the cable. Then I have
one of the boxes hooked to the main TV.. If my wife could operate things, I
would go to something like Netflix.


For Netflix, there are a variety of options. Computer, game box,
media player, tablet computers, and built into the TV. For your wife,
I suggest you try one of the Roku media players:
http://www.roku.com/products/compare
I have an older Roku 2 XS box and use it for Netflix. The remote
control has only a few buttons, so it's fairly easy to learn. The
difficult part is searching for shows to watch. I like to do that on
a computah, where I can type in the name of the program on a real
keyboard. You can plug in a keyboard into the Roku box, but that
might add too much complexity. When I find something worth watching,
I add it to my "favorites" list, which appears at the top of the
screen when selecting shows on Netflix. What's really nice about
Netflix is the total lack of commercials.

Last week, one of my customers bought an Xbox One gizmo at Costco.
Nifty system which can be voice controlled. All he has to do is say
"Xbox show Netflix" and it's up. However, within Netflix, he has to
use the included remote control. With the cable box, he can go
directly to his favorite channel. "Xbox show TCM" will bring up
Turner Classic Movies. If your wife can handle voice commands, it
might be an (expensive) option.

Marginally related RF drivel: One of my friends is avid DX'er. He
has all his media and computer gizmos interconnected via Wi-Fi because
Wi-Fi creates less RFI than ethernet. Then, he asks me to figure out
why his wi-fi is so slow. None of the computers caused problems, but
running Netflix in full 1080p was what was killing his wireless. My
solution was to sell him a dual band wireless router, and reserve the
5GHz band for video.

--
Jeff Liebermann
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
  #8   Report Post  
Old December 16th 13, 12:46 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Oct 2012
Posts: 1,067
Default Turning a 1/4 wave vertical upside down

On 12/16/2013 2:43 AM, Jeff Liebermann wrote:
On Tue, 3 Dec 2013 23:37:43 -0500, "Ralph Mowery"
wrote:

A newer TV gets the analog and digital chanels off the cable. Then I have
one of the boxes hooked to the main TV.. If my wife could operate things, I
would go to something like Netflix.


For Netflix, there are a variety of options. Computer, game box,
media player, tablet computers, and built into the TV. For your wife,
I suggest you try one of the Roku media players:
http://www.roku.com/products/compare
I have an older Roku 2 XS box and use it for Netflix. The remote
control has only a few buttons, so it's fairly easy to learn. The
difficult part is searching for shows to watch. I like to do that on
a computah, where I can type in the name of the program on a real
keyboard. You can plug in a keyboard into the Roku box, but that
might add too much complexity. When I find something worth watching,
I add it to my "favorites" list, which appears at the top of the
screen when selecting shows on Netflix. What's really nice about
Netflix is the total lack of commercials.

Last week, one of my customers bought an Xbox One gizmo at Costco.
Nifty system which can be voice controlled. All he has to do is say
"Xbox show Netflix" and it's up. However, within Netflix, he has to
use the included remote control. With the cable box, he can go
directly to his favorite channel. "Xbox show TCM" will bring up
Turner Classic Movies. If your wife can handle voice commands, it
might be an (expensive) option.

Marginally related RF drivel: One of my friends is avid DX'er. He
has all his media and computer gizmos interconnected via Wi-Fi because
Wi-Fi creates less RFI than ethernet. Then, he asks me to figure out
why his wi-fi is so slow. None of the computers caused problems, but
running Netflix in full 1080p was what was killing his wireless. My
solution was to sell him a dual band wireless router, and reserve the
5GHz band for video.


Then he has a problem in his ethernet. Properly installed, ethernet
creates virtually no interference.

--
==================
Remove the "x" from my email address
Jerry, AI0K

==================
  #9   Report Post  
Old December 16th 13, 07:21 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: May 2007
Posts: 9
Default Turning a 1/4 wave vertical upside down

On Sun, 15 Dec 2013 23:43:26 -0800 in rec.radio.amateur.antenna,
Jeff Liebermann wrote,
Marginally related RF drivel: One of my friends is avid DX'er. He
has all his media and computer gizmos interconnected via Wi-Fi because
Wi-Fi creates less RFI than ethernet.


Woah, how can that be? Would using shielded cat6 fix it?

  #10   Report Post  
Old December 16th 13, 08:27 PM posted to rec.radio.amateur.antenna
external usenet poster
 
First recorded activity by RadioBanter: Aug 2013
Posts: 154
Default Turning a 1/4 wave vertical upside down

On 12/2/2013 12:39 AM, Jeff Liebermann wrote:
Comcast is now all digital in the People's Republic of Santa Cruz CA.


I got my cable bill a few days ago, noted it had increased $10.00.
Told the wife, she said ya, after Nov. the reduction I got last Nov.
expired. She went in, made her yearly complaint, but this time she
got a $20.00 discount! The bill dropped from $123.54 to $103.xx.
(Cable, phone and internet)
$240 a year, I think I'll taker her out for an ice cream cone. :-)
Mikek


Reply
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Which is better: 5/8 wave vertical or J pole? David Antenna 29 November 20th 10 03:50 PM
New program - 1/2-wave vertical Reg Edwards Antenna 6 May 13th 05 04:29 PM
5/8 wave 6m vertical [email protected] Antenna 7 February 15th 05 03:02 PM
1/4 wave vertical vs. loaded vertical Dave Antenna 6 May 26th 04 01:28 AM
upside down vertical? The Eternal Squire Antenna 5 January 28th 04 12:28 AM


All times are GMT +1. The time now is 08:03 PM.

Powered by vBulletin® Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Copyright © 2017