A Folded Dipole for 2-meters (70-cm?) (048)

Описание к видео A Folded Dipole for 2-meters (70-cm?) (048)

I created a video a few weeks ago showing how to create a 4:1 BALUN using coax. In this video I created a 4:1 BALUN for the Amateur Radio 2-meter band, centered on 146 MHz.
Someone asked the question,"Why would you ever need a 4:1 BALUN for the 2-meter band?"
GOOD QUESTION!
In answer to this, I am going to show you how to create a folded dipole antenna for the 2-meter band using the 4:1 BALUN previously created as the impedance matching device.

I will create two distinct version of this antenna:
1. The Solid Wire Version using #4AWG solid copper wire
2. The Copper Tubing Version using 1/4-in OD copper tubing.

I will test this antenna on both the 2-meter and 70-cm bands. The results may surprise you.

Here are the promised links for you:
===============================================
4NEC2 Modelling Program Download
https://www.qsl.net/4nec2/

4NEC2 Model for the Folded Dipole
https://drive.google.com/file/d/1fWF0...

Time Markers for Your Convenience
----------------------------
00:05 Introductory Comments
01:40 The Plan: 4NEC2 Modeling
07:34 The Bending Jig
08:26 How long do we cut our wire?
11:28 Cutting the wire
12:06 Creating the Antenna using the bending jig
13:20 Preparing for Test
13:23 Tinning the Feedpoint
13:40 Create a Mounting Point
14:41 Connecting the BALUN/Feedline
14:47 Testing Begins
14:59 Call to reality on results ...
15:40 Test Results
15:55 Test Result Debriefing
16:51 The Tubing Version
17:29 How long do we cut the tubing?
18:33 The Assembly Procedure...
19:41 The Actual Build-bending the tubing
20:08 Trimming the excess
20:31 Preparation for testing
20:32 Tin the Feedpoint Ends
20:40 Create the Mounting Device
20:54 Connect the BALUN/Feedline
21:02 TESTING
21:05 Test Results on 2-meters
21:17 What about 70-cm?
22:32 Create a more substantial mounting plate
23:59 Testing the Modified Antenna
24:03 Test Results on 2-meters
24:25 Test Results on 70 cm
25:01 How much lighter is the Tubing Version?
25:34 Final Comments and Toodle-oots
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