[TowerTalk] High power 2:1 transformer was Re: 16om vertical and the number of radials

[marsh at ka5m.net]

I stand corrected. A vertical with radials is of course unbalanced. I'm appropriately embarrassed.

No more antenna advice from me.

Marsh KA5M




-----Original Message-----
From: Richard (Rick) Karlquist <richard at karlquist.com> 
Sent: Friday, December 02, 2022 3:42 PM
To: marsh at ka5m.net; 'Pete Smith N4ZR' <pete.n4zr at gmail.com>; towertalk at contesting.com
Subject: Re: [TowerTalk] High power 2:1 transformer was Re: 16om vertical and the number of radials

Wrong device.  You want an "UNUN" not a "BALUN".
A vertical antenna is unbalanced.

I have an UNUN built with RG-58 coax wound around a 2.4 inch #33 ferrite core. Very easy to make.

Rick N6RK

On 12/2/2022 1:05 PM, marsh at ka5m.net wrote:
> Yes, match at the feedpoint.
> 
> You might check out Balun Designs:
> https://www.balundesigns.com/1-2-balun-25-to-50-ohms-3kw-1213/
> 
> Marsh, KA5M
> 
> 
> -----Original Message-----
> From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of Pete 
> Smith N4ZR
> Sent: Friday, December 02, 2022 2:39 PM
> To: towertalk at contesting.com
> Subject: [TowerTalk] High power 2:1 transformer was Re: 16om vertical 
> and the number of radials
> 
> A somewhat related question - as the R component at the feedpoint of my inverted L goes down toward 25 ohms, I've begun wondering if I should do some matching at the feedpoint, rather than using my tuner in the shack, even though feedline losses at 160 are relatively low.  Can someone point me toward a good way to do a 2:1 downward transformation?  I already have a common mode choke at the feedpoint.
> 
> 73, Pete N4ZR
> Check out the new Reverse Beacon Network web server at<https://reversebeacon.net>.
> For spots, please use your favorite
> "retail" DX cluster.
> 
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>