| Author |
Message |
    
Capt_hook
Member
Username: Capt_hook
Post Number: 57
Registered: 6-2004
| | Posted on Thursday, July 22, 2004 - 5:46 am: | 
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any one know what size to make the base of a tower(concrete) tower 40' i think i seen a formula some where said what the base size was to the height of the tower ? |
Viking
Intermediate Member
Username: Viking
Post Number: 147
Registered: 2-2002
| | Posted on Thursday, July 22, 2004 - 10:31 am: |
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Looking at the Rohn site, from what I can see they say 4' deep and 2.5' diameter. This was for normal soil conditions. That sounds smaller than I though I remembered from other readings though. |
Ca346
Advanced Member
Username: Ca346
Post Number: 886
Registered: 8-2003
| | Posted on Thursday, July 22, 2004 - 10:33 am: |
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Go to Champion Radio on the web. They have a great list of the spec's for various tower heights. Most are 3x3x3 with rebar every 1ft. Some are much deeper. I have a 4x4x4 concrete foundation (overkill) for my 50ft Rohn tower. |
Tech808
Moderator
Username: Tech808
Post Number: 3036
Registered: 8-2002
| | Posted on Thursday, July 22, 2004 - 11:16 am: |
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Ca346,
Overkill, NAWWWWWWWWWWWWW its called SECURITY.  |
Crackerjack
Member
Username: Crackerjack
Post Number: 68
Registered: 7-2004
| | Posted on Thursday, July 22, 2004 - 3:48 pm: |
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Yes, Amen! Don't get a permit and one neighbor finds out, and he has you by the britches, no matter what FCC rules say.
The guy in my church who installed my base antenna for free, is the County Inspector. |
Lowpowerhal
Intermediate Member
Username: Lowpowerhal
Post Number: 291
Registered: 7-2003
| | Posted on Thursday, July 22, 2004 - 9:07 pm: |
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Just want to ask one question, Is this 40 foot tower free standing? Capt Hook mentions no name or brand of tower.Please forgive me i might of missed something on another post.I want to help but not enought info to suggest what to do. Let me know. I will try to help! Please take all safety procations on putting a tower up , Its a big Project. And think and have help.The more help you have the better.
Hal |
Capt_hook
Member
Username: Capt_hook
Post Number: 62
Registered: 6-2004
| | Posted on Friday, July 23, 2004 - 5:46 am: |
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sorry this tower is free standing 4/sec bolt togather rohn think thats what its called . (oh and its silver) |
Applejack
Intermediate Member
Username: Applejack
Post Number: 186
Registered: 8-2003
| | Posted on Tuesday, July 27, 2004 - 10:31 pm: |
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what the heck, i put my 4 sections of tower in the ground 4'with nothing but dirt in january 1995. its supported at 10' with a tv tower bracket to my garage, no guy wires or anything else.it held a 4 element beam for 3 or 4 years, then an astroplane and now the beam and a99. right or wrong its still up there...#174 central ohio..aj |
Crackerjack
Intermediate Member
Username: Crackerjack
Post Number: 148
Registered: 7-2004
| | Posted on Wednesday, July 28, 2004 - 1:23 am: |
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Applejack:
Could you expound on how the A00 and Bwam are mounted on the same mast? |
Applejack
Intermediate Member
Username: Applejack
Post Number: 195
Registered: 8-2003
| | Posted on Tuesday, August 03, 2004 - 9:12 pm: |
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crackerjack, sure, the mast sticks up about 1 foot past the boom and the a99 is mounted to it with just inches between the top of the boom and the feedpoint of the a99. oh and the beam is mounted horizontal...aj |
Crackerjack
Intermediate Member
Username: Crackerjack
Post Number: 198
Registered: 7-2004
| | Posted on Wednesday, August 04, 2004 - 12:13 am: |
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Applejack:
Thanks, I am thinking that even a 102" mounted that way would be useful for listening. Or even an inverted V from the mast.
My geographical location, gives me 3 basic directions to point a 4 element beam, I could fine tune from there once contacts are made.
I am getting serious about this now.
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