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Antennas (45 articles)

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The Double Bazooka Antenna - A YouTube Review

Over the past six weeks, I have been experimenting with two new antennas: the 80 and 40 meter Double Bazookas. After some research, I purchased the full size bazookas from IAC Antenna Corporation, in Pennsylvania. They work.......and they work VERY well!! It's been a lot of fun trying...

Published on 5/4/2013, 9:52 AM by VK3BVW | 0 comment(s)

Tags: double bazooka antenna iac antennas DXing SWL 80mb 40mb

HOA? CCR's? Cant put up an antenna?

I hear this so often it scares me. HOA with CCR's are a problem more of us are facing every year. With every new neighborhood the CCR's get worse and the HOA Police more of a PIA. Keep in mind though that metal is metal and it ALL radiates some RF, your options...

Published on 4/1/2012, 11:20 PM by KG4FET | 3 comment(s)

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80 meter Better Efficiency on 5-BTV (part 2)

This time while messing around on the antenna net I found a few nice designs and figured I would share. I took my Old trusty 5-btv and removed the 80 meter dummy load. Then I made a trap made from this design http://www.seed-solutions.com/gregordy/Amateur%20Radio/Experimentation/CoaxTrap.htm...

Published on 2/6/2012, 9:46 PM by k7zgq | 0 comment(s)

Tags: 5-btv 80 Meter SWR modification homebrew 40 meter Trap

The Sigma-10 Vertical Antenna

This antenna, manufactured by "Force -12 Texasantennas" is a full size true vertical dipole for 10m capable of 5kW and resistant to winds of up to 90mph when guyed once. It covers the whole band from 28.0-29.7 MHz at a SWR of less than 1.6:1. It utilizes T-Bars at the end to work...

Published on 1/21/2012, 7:24 AM by ZL1DAS | 2 comment(s)

Tags: Sigma-10 10m Vertical

CHAMELEON HF MULTIBAND ZEPP ANTENNA 10M – 80M

The Chameleon HF Multiband Zepp Antenna has been specially designed for apartments, condominiums, homeowners associations, deed restrictions and CCRs (Covenants, Conditions & Restrictions), ARES, RACES, MARS, EMCOMM, NVIS, First Responders, Emergency Preparedness and attic...

Published on 1/21/2012, 7:07 AM by ZL1DAS | 1 comment(s)

Tags: CHAMELEON HF MULTIBAND ZEPP ANTENNA 10M – 80M

R5 Matching Unit Rebuild

Here is some good info that was shared to me. OverviewThis article describes how to rebuild a matching unit of a Cushcraft R5 vertical. Below are a few pictures of a re-built and slightly modified R5 matching unit. The transformers and choke of the matching unit were assembled using the...

Published on 12/11/2011, 3:24 PM by KD8BIG | 1 comment(s)

Tags: Antennas

Electrically-Short Dipole Antennas

A dipole antenna normally is cut for approximately one half of a wavelength. The customary formula is (468 / F) feet or (142.65 / F) meters where F is the frequency in MHz. This works out to about 0.48 wavelength. The dipole antenna has seen little use...

Published on 10/24/2011, 4:30 PM by KD8BIG | 2 comment(s)

Tags: antenna

80 meter Better Efficiency on 5-BTV

I was having a hard time getting out or even tuning my 5-btv with the stock 80 meter resonator so after a bit of research I purchased a MFJ 40 meter hamstick. I created a capacity hat from a few pieces of angle aluminum from Lowes which consisted of 2 48 inch legs and placed them between the whip...

Published on 10/9/2011, 1:37 AM by k7zgq | 2 comment(s)

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Power Rating of Solid-Polyethylene-Insulated Coaxial Cables

This program assists with selection of dimensions of RF coaxial cables when input power is high enough to cause concern about the temperatures to which plastic materials may be subjected. It will also assist with estimating the power rating, Zo and attenuation of a cable...

Published on 10/8/2011, 11:55 AM by KD8BIG | 2 comment(s)

Tags: antennas

How to fine-tune your homebrew loop antenna

How to fine-tune your homebrew loop antenna Is the null in the direction better if the antenna is bigger? Not necessarily.Null and sensitivity are generally better in larger loops, but the nulls are principally determined...

Published on 10/5/2011, 6:08 AM by KD8BIG | 1 comment(s)

Tags: Antenna

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