Hi Pete,
1/4 wave electrical length.
89 feet for two RG-11 solid dielectric coaxes in parallel.
73
Frank
W3LPL
From: "Pete N4ZR N4ZR" <pete.n4zr@gmail.com>
To: "donovanf" <donovanf@starpower.net>
Sent: Monday, January 17, 2022 5:12:48 PM
Subject: Re: Topband: 1:2 UNUN
lengths? 1/4 wave?
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at [ http://beta.reversebeacon.net/ |
<http://beta.reversebeacon.net> ] .
For spots, please use your favorite
"retail" DX cluster.
On 1/17/2022 11:29 AM, Frank W3LPL wrote:
Hi Kenny,
A very workable alternative is to use two lengths of 75 ohm coax
in parallel. RG-11 is the best choice, but two lengths of RG-6
will also work. No need to coil it up, simply use it as part
of your transmission line from your antenna base to your station.
73
Frank
W3LPL
----- Original Message -----
From: "Kenneth Silverman" [ mailto:kenny.k2kw@gmail.com |
<kenny.k2kw@gmail.com> ] To: "topband" [ mailto:topband@contesting.com |
<topband@contesting.com> ] Sent: Monday, January 17, 2022 2:18:30 PM
Subject: Topband: 1:2 UNUN
Does anyone have a drawing on how to wind a 1500w 1:2 UNUN? And what type of
core is needed?
This is for my 160m vertical which is about 28 ohms.
Regards , Kenny K2KW
_________________
Searchable Archives: [ http://www.contesting.com/_topband |
http://www.contesting.com/_topband ] - Topband Reflector
_________________
Searchable Archives: [ http://www.contesting.com/_topband |
http://www.contesting.com/_topband ] - Topband Reflector
_________________
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
|