A 40m 80m Dual Band Vertical

This is a interesting antenna design I recently modified and constructed to meet my needs. It allows 80m and 40m operation on a single antenna and switches bands "automatically". Here is a link to the QST article describing the original 20m/40m design:

http://www.k6mhe.com/files/DualBandVert.pdf

Thanks to Wes W7ZOI for a really neat antenna design and to Danny K6MHE for permission to use this information.

Please take a look at my tech blog for a detailed explanation of this antenna as well as other projects I may be working on at the time:

http://ab8xx.blogspot.com/

Category:

Science & Technology

Tags:

• hf
• amateur radio
• ham radio
• radio
• 80m
• 40m
• antenna
• dual band
• homebrew
• ab8xx

[kc7fys]

How did you get the wire up there?

[ab8xx]

I used a slingshot with a weight attached (VERY DANGEROUS!) and then pulled a rope over the branch. It suspends a pulley that I can raise and lower the antenna with.

[ab8xx]

No, no es realmente corto. El elemento vertical es de 68 '(20.7m) de largo y llega hasta el árbol. Los radiales son la misma longitud. El 40, que funciona como un fin alimentados onda media, en 80m funciona como un plano vertical. 73

Google Translation:

so short and it works ...

No, it is not really short. The vertical element is 68' (20.7m) long and goes up the tree. The radials are the same length. On 40m, it works as an end fed half wave, on 80m it works as a regular ground plane vertical.

[wx9dx]

Yep I have done the same thing with my 40 meter verticals on 20 meters. Works great!!!!!!!! Thanks for supporting Ham Radio On youTube:) Jimmy

[ke5pcv]

No kidding about the choke!

[Gearloose100]

Looks good.. -73- de VE3WGW

[soroastronik]

tan corta y funciona?...

[VictoreCelia]

very cool...