Copper Talk » Ask The Tech » Antennas » 146 mhz J - pole ? « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Lowpowerhal
Intermediate Member
Username: Lowpowerhal

Post Number: 305
Registered: 7-2003
Posted on Saturday, August 14, 2004 - 1:30 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Ok help me out guys. Im making a 2 meter j-pole.Ok to start off the main element is 57 3/4inches long and the tuning stub is going to be 19 3/4 inches long .Is this right so far? Ok the main question is the space between the main element and the tuning stub. If im did my math right, the inside measurement between the main element and tuning stub is 2 inches is this correct?Also making this out of 1/2 inch rigid copper pipe. Any help would shur be appreciated.This is my weekend constuction project. HELP
And Thanks
Hal kc0svc
Top of pagePrevious messageNext messageBottom of page Link to this message

Barracuda
Intermediate Member
Username: Barracuda

Post Number: 254
Registered: 3-2003


Posted on Saturday, August 14, 2004 - 3:55 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Lowpowerhal,
Try this website. You get to input the frequency and it gives you back all the dimensions.

J Pole Calculator

Have fun,
Barracuda
Top of pagePrevious messageNext messageBottom of page Link to this message

Tech808
Moderator
Username: Tech808

Post Number: 3295
Registered: 8-2002


Posted on Saturday, August 14, 2004 - 4:09 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Hal,

Check out the Link Below as this is the exact same instructions our Ham Club has used for years in building 2 Meter J Pole antennas.

We have used the 2 Meter J Pole on the Red Cross building here for several years now with very good results.

http://www.alpharubicon.com/elect/jpolejaden.htm

Hope this helps.

Lon
Tech808
N9OSN
Top of pagePrevious messageNext messageBottom of page Link to this message

Lowpowerhal
Intermediate Member
Username: Lowpowerhal

Post Number: 306
Registered: 7-2003
Posted on Saturday, August 14, 2004 - 8:09 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Thank You Lon and Barracuda , We got it cut to all the dimension we will solder it up tonight.And with any luck will have it on the air in a week or two.
Thanks again
Hal
kc0svc

Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action: