WorldWide Radio Forum  

Go Back   WorldWide Radio Forum > Amateur Radio Related > Amateur Radio Antennas




Notices

Amateur Radio Antennas

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 07-23-2008, 09:34 PM
Member
 
Join Date: Jun 2008
Posts: 41
misuse is on a distinguished road
Default At what height mast do you start using wire?

How high is too high for just a tripod bolted to the roof?
What kind of wire would I use and how do I attach it?
I am only up 30 feet rite now with a small antenna.
Reply With Quote
  #2 (permalink)  
Old 07-23-2008, 10:44 PM
Member
 
Join Date: Aug 2005
Location: Post Oak Bend,Texas
Posts: 68
Dealer is on a distinguished road
Default

Quote:
Originally Posted by misuse View Post
How high is too high for just a tripod bolted to the roof?
What kind of wire would I use and how do I attach it?
I am only up 30 feet rite now with a small antenna.
Some things would need to know like height of tripod ? Is it a 3ft. 6ft. and does it
have three or four legs.
You say you are up 30ft. now, Is that from top of the roof already ?

A small antenna like which one and what are your plans.
If you are 30ft. from rooftop now and a 3ft. tripod then I would say that you
are maxed out now.

Several ways of guying the mast, and how close to antenna and with what material
depends on some more information.

Regards,

John
__________________
Dealer CDX211

"People should learn to use things and love people, instead of loving things and
using people"
Reply With Quote
  #3 (permalink)  
Old 07-24-2008, 12:18 AM
Antenna Tech
 
Join Date: Apr 2005
Location: Southern CA
Posts: 1,440
Master Chief is on a distinguished road
Default

You are beyond maxed out already. I'd guy at 15' and twice for 30'.
__________________
The BEST money you will EVER spend on a radio system is on the ANTENNA and FEEDLINE!
http://www.cbjunk.com/

Reply With Quote
  #4 (permalink)  
Old 07-24-2008, 01:35 AM
Member
 
Join Date: Jun 2008
Posts: 41
misuse is on a distinguished road
Default

Scan-tenna and Radioshack 3' Tripod
RadioShack.com - Home Entertainment: Accessories: Antennas: Antenna accessories: Heavy-Duty 3-Foot Tripod Mount

30' including tripod on top of single story house. I made sure there are no electrical lines anywhere it can fall.

So how do I "guy"?
Reply With Quote
  #5 (permalink)  
Old 07-24-2008, 08:31 AM
Beetle's Avatar
Senior Member
 
Join Date: Dec 2005
Location: Western Washington
Posts: 766
Beetle is on a distinguished road
Default

IIX QUADPODS and GUY PLATES

Then guy wire (Google it) or Phillystran, with turnbuckles to adjust tension
__________________
No trees were harmed in the sending of this post; however, many electrons were inconvenienced.

73 de K7KBN
Reply With Quote
  #6 (permalink)  
Old 07-24-2008, 10:18 AM
Member
 
Join Date: Aug 2005
Location: Post Oak Bend,Texas
Posts: 68
Dealer is on a distinguished road
Default

Quote:
Originally Posted by misuse View Post
Scan-tenna and Radioshack 3' Tripod
RadioShack.com - Home Entertainment: Accessories: Antennas: Antenna accessories: Heavy-Duty 3-Foot Tripod Mount

30' including tripod on top of single story house. I made sure there are no electrical lines anywhere it can fall.

So how do I "guy"?
OK let us try this First of all, a 3ft tri-pod Will Not align with any roof rafters
so a plate should be made and used if you can reach the under side of the roof for
each leg on the tri-pod.

Not knowing what kind of mast makes it kinda up to you finding guy rings for it.

Master Chief is correct in where they should be at this point in time.

First you want to guy antenna 120 degrees apart using guy wire, thimbles,
turnbuckles and guy wire clamps. You could use 4 wires 90 degrees apart if your
plans are for a larger antenna than What? You have not said.

If you had a push up pole bought new then it would have had rings attached !!

If it is one you made, out of ?? then the rings will be your call on that one.

Only real problem I see is in guying at 30ft which seems to be at base of this unknown
antenna.

You will need egg insulators spaced correctly if using wire, also UV rope is a option
and if course you can use Phillystrand !! Google Texas Towers for that one and be sure
you are sitting down

I have 3) 50ft. rolls that have never been used Yet but the day will come when it gets
some use...

Research and read is best advice I can give on a general topic !! Wish that I could
do better for you.

Best Regards,
John - KD5WJY
__________________
Dealer CDX211

"People should learn to use things and love people, instead of loving things and
using people"
Reply With Quote
  #7 (permalink)  
Old 07-24-2008, 06:36 PM
Senior Member
 
Join Date: Apr 2002
Posts: 2,163
moleculo has disabled reputation
Default

Personally, I like and use this rope for guys: Synthetic Textiles Inc

It's made local in here in SoCal, too. You don't have to mess with insulators, turnbuckles,etc.
Reply With Quote
  #8 (permalink)  
Old 07-24-2008, 07:02 PM
Senior Member
 
Join Date: Apr 2005
Location: Oklahoma
Posts: 1,837
W5LZ is an unknown quantity at this point
Default

I think I may be missing something here. What antenna do you have on that tripod? On a mast, or straight to the tripod?
If the antenna is mounted straight to the tripod, a guy or two (well, three at least) holding the top of the tripod to some points something like 15 feet from the base of the tripod, isn't a bad idea. Might be a bit of 'over-kill' but it shouldn't hurt anything anyway. If you have a mast coming from the tripod, another set of guys from the joint of each section of mast isn't a bad idea either. But, that may be getting a bit ahead of things if you aren't using a mast.
- 'Doc


A 'guy' is a rope/wire that holds things still. Sort of like the ropes on a tent that help hold it up. A guy rope/wire needs to be at ~least~ as strong as the largest force acting on the guyed structure. Considering wind forces, that can get pretty 'strong'. Think of that antenna as a sail, and the wind acting on it. Like that.
Reply With Quote
  #9 (permalink)  
Old 07-25-2008, 08:37 AM
Member
 
Join Date: Jun 2008
Posts: 41
misuse is on a distinguished road
Default

The mast is Radio Shack brand.
RadioShack.com - Home Entertainment: Accessories: Antennas: Antenna accessories: Heavy-duty Antenna Mast
Reply With Quote
  #10 (permalink)  
Old 08-26-2008, 04:29 AM
Junior Member
 
Join Date: Aug 2008
Posts: 5
flyingfox is on a distinguished road
Default

ONLY USE WIRE STAYS WHEN THE MAST BENDS ON A DAY THE WIND IS BLOWING
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

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


All times are GMT -7. The time now is 02:57 PM.


Powered by vBulletin®
Copyright ©2000 - 2008, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.2.0
WorldWide Radio Forum