Links from Meeting Presentation 07-10-2018: Beyond the J-Pole

coil crop DSC_2208The response and interest in my presentation was great! Here are the links from the presentation and the details of my antenna build. Remember, we’ll be building this antenna at the July 28th, 2018, Lecture and Lab.

My modifications to the design by F3WM:

If you want to reproduce my design exactly, use CQ-118 from The Wireman.

I wanted full 2-meter band coverage; I used a 19 11/16” (498mm) upper section and a 19 3/4” (500mm) lower section instead. His size will work better in a radome, if you want to weatherproof the antenna.

Continue reading

Tech Net News 08-26-2017

If you attended today’s Lecture and Lab, I hope you had fun! If you need a copy of Budd’s original Buddipole plans, you can find them here. My add-on page of changes is available in this file. Some of you also had questions about the choke balun that I use. You can find more information in this “RFI-HAM” document; I followed the bifilar choke instructions on page 37. [Edit in 2020: the information about the “radio doughnut” chokes has been moved to a separate choke cookbook.]

Our next club meeting will be on September 5th. NWS radar expert Jason Dunn will present on “Reading Weather Radar.”

Don’t forget to sign up for Lifewalk! Members, check your email! The DARC will be supporting this charity run/walk on Sunday, October 1st. Club members have received sign-up links in their email. Non-members who’d like to help should send us a message using the contact form.

Continue reading

Lecture and Lab 08-26-2017: What to Bring

We will have several extra sets of parts at the August Lecture and Lab, so don’t panic if you forgot to pre-register. What should you bring with you to the build?

At the very least, you’ll want to bring your choice of feedline connector. For many hams this will be a panel-mount SO-239, but you might prefer a panel-mount N or BNC. You’ll also need to bring some electrical tape, and possibly some coax if you want to test your antenna. A soldering iron and some solder will help you make much stronger connections.

Continue reading