| Author |
Message |
    
Galileo
| | Posted on Sunday, October 12, 2003 - 10:10 pm: | 
|
Ok Antenna experts, If you were going to BUILD the very best Omni directional antenna for 40-50 Mhz, what would you do??? Groundplane?? Dipole??? Strung wire?? Also, what type of feedline??? Connectors??? Any details would be most helpful..Please go into detail...Thanks in advance for any help,Tom Shaw |
Kc0gxz
| | Posted on Monday, October 13, 2003 - 1:29 am: |
|
Galileo
Just get yourself a cheap scanner antenna from Coppers.
Jeff, kc0gxz |
Bruce
| | Posted on Monday, October 13, 2003 - 4:41 am: |
|
galileo
A groundplane works fine and coax loss is small so good mini-8 is fine..... remember that at that frequency except for a discone your bandwidth fot the antenna will be about 3 mhz so you need to cut it with that in mind. |
Galileo
| | Posted on Monday, October 13, 2003 - 7:39 pm: |
|
Hey thanks, No, I already have several scanner antennas, 2 omni scantenna's and a 800 MHZ yagi...I really want some ideas for building a 40-50 Mhz omni...I want one with some gain on these freq's....Any ideas????? Thanks for any help....Tom Shaw |
707
| | Posted on Tuesday, October 14, 2003 - 1:49 am: |
|
I would go with stacked halos, perhaps three or four with well engineered interbay jumpers. |
Bruce
| | Posted on Tuesday, October 14, 2003 - 8:43 am: |
|
707
i use squailos on 6 nice horizontal antennas and 4 stacked is a killer base |
707
| | Posted on Tuesday, October 14, 2003 - 2:36 pm: |
|
Yep-
Many if not most FM broadcasters use the stacked "halo" or "rototiller" antennas to great effect, so it can't be all bad. If you figure 0 gain for the first one, then 3db each afterwards, you can stack quite a bit of gain in a short space with flat halos, squalos or if you want to get crazy, homebrew rototillers. |
Galileo
| | Posted on Wednesday, October 15, 2003 - 9:20 pm: |
|
Bruce, and 707,
Would like to hear more.....How practical is this antenna type for this freq???? Dont know if my ability is up to something real complicated....Thanks to all for the replys, Tom Shaw |
Bruce
| | Posted on Thursday, October 16, 2003 - 7:56 am: |
|
this link is one of many a squailo is a bent dipole i have used them since the 60's at 40 meg it will be a squair of tubeing about 6 foot each side
http://home.online.no/~la8ak/a71.htm
|
Galileo
| | Posted on Friday, October 17, 2003 - 7:17 pm: |
|
Thanks Bruce..... |
|
