Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Charts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Gold Prospecting
Do It Yourself (DIY) Projects
HF radio antenna - DIY
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Prospecting Australia:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="user 12139" data-source="post: 616761" data-attributes="member: 12139"><p>by the way, a G5RV, Off Center Fed, End Fed or any antenna that is a half wave in length and not voltage fed or connected at its high current point ie... fare smack in the middle as I outlined how to calc above, is a mismatch for 50 ohm and nessitates a matching balun. So all these fangdangled antennas mentioned are useless unless you fully understand what your doing and can even be disastrous for your radio and if using enough power you too!!!</p><p>Feeding the middle of a half wave dipole will give you about 72ohm at the feed point... good enough for a safe VSWR less than 2:1. if you can find someone with a SWR Bridge you can easily tune the antenna without any Balun or Tuned length of 300 ohm ribbon, so all you need is the wire and required length of 50 ohm coax to you radio and your good to go. Believe me, a half wave dipole setup like this works very very well</p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/12139/1628313427_51792a77-5c7d-4a92-b11e-ac52c9d9d348.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="user 12139, post: 616761, member: 12139"] by the way, a G5RV, Off Center Fed, End Fed or any antenna that is a half wave in length and not voltage fed or connected at its high current point ie... fare smack in the middle as I outlined how to calc above, is a mismatch for 50 ohm and nessitates a matching balun. So all these fangdangled antennas mentioned are useless unless you fully understand what your doing and can even be disastrous for your radio and if using enough power you too!!! Feeding the middle of a half wave dipole will give you about 72ohm at the feed point... good enough for a safe VSWR less than 2:1. if you can find someone with a SWR Bridge you can easily tune the antenna without any Balun or Tuned length of 300 ohm ribbon, so all you need is the wire and required length of 50 ohm coax to you radio and your good to go. Believe me, a half wave dipole setup like this works very very well [img]https://www.prospectingaustralia.com/forum/img/member-images/12139/1628313427_51792a77-5c7d-4a92-b11e-ac52c9d9d348.jpg[/img] [/QUOTE]
Verification
Post reply
Gold Prospecting
Do It Yourself (DIY) Projects
HF radio antenna - DIY
Top