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

To: "towertalk@contesting.com" <towertalk@contesting.com>
Subject: Re: [TowerTalk] High power 2:1 transformer was Re: 16om vertical and the number of radials
From: Grant Saviers <grants2@pacbell.net>
Date: Fri, 2 Dec 2022 17:53:43 -0800
List-post: <mailto:towertalk@contesting.com>
I've been using the 2:1 one for 7 years at QRO for a good match at the antenna as I don't have a tuner at the amp. I can match < 1.4:1 the entire band by switching in series capacitance in 50KHz steps to the 1.83 resonance.

Grant KZ1W

On 12/2/2022 13:05, marsh@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@contesting.com> On Behalf Of Pete Smith N4ZR
Sent: Friday, December 02, 2022 2:39 PM
To: towertalk@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.


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