Date: Mon, 17 Jan 2022 20:18:52 + (UTC)
From: Mike Furrey
To: 'Kenny Silverman' , 'TopBand List'
Subject: Re: Topband: 1:2 UNUN
< Perhaps a "hair pin" match? I used a hair pin coil at the base of a
vertical that was 35 ohms.
<73, Mike WA5POK
## a simple
opband [mailto:topband-bounces+k3lr=k3lr@contesting.com] On
> Behalf Of Richard (Rick) Karlquist
> Sent: Monday, January 17, 2022 1:10 PM
> To: Kenny Silverman; TopBand List
> Subject: Re: Topband: 1:2 UNUN
>
> Maybe this will help:
>
> I use a 1:2.25 Unun (3 to 2 turns rati
@contesting.com] On
Behalf Of Richard (Rick) Karlquist
Sent: Monday, January 17, 2022 1:10 PM
To: Kenny Silverman; TopBand List
Subject: Re: Topband: 1:2 UNUN
Maybe this will help:
I use a 1:2.25 Unun (3 to 2 turns ratio). It will match 22.2 ohms
to 50 ohms. It is wound on a single 2.4 inch
. Steps up to 50 ohms perfectly.
73
Tim K3LR
-Original Message-
From: Topband [mailto:topband-bounces+k3lr=k3lr@contesting.com] On
Behalf Of Richard (Rick) Karlquist
Sent: Monday, January 17, 2022 1:10 PM
To: Kenny Silverman; TopBand List
Subject: Re: Topband: 1:2 UNUN
Maybe this will he
, 2022 1:10 PM
To: Kenny Silverman; TopBand List
Subject: Re: Topband: 1:2 UNUN
Maybe this will help:
I use a 1:2.25 Unun (3 to 2 turns ratio). It will match 22.2 ohms
to 50 ohms. It is wound on a single 2.4 inch diameter core of 77
material. A pair of RG-58 coax cables are wound around
Maybe this will help:
I use a 1:2.25 Unun (3 to 2 turns ratio). It will match 22.2 ohms
to 50 ohms. It is wound on a single 2.4 inch diameter core of 77
material. A pair of RG-58 coax cables are wound around it in
tandem. I put on as many turns as would fit ... about 10 turns.
The shields of
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"
To: "donovanf"
Sent: Monday, January 17, 2022 5:12:48 PM
Subject: Re: Topband: 1:2 UNUN
lengths? 1/4 wave?
73, Pete N4
mission line from your antenna base to your station.
> >
> > 73
> > Frank
> > W3LPL
> >
> > - Original Message -
> > From: "Kenneth Silverman"
> > To: "topband"
> > Sent: Monday, January 17, 2022 2:18:30
ot;topband"
Sent: Monday, January 17, 2022 4:47:37 PM
Subject: Re: Topband: 1:2 UNUN
Thanks Frank. Are these 1/4 wl lines? And are T-connectors OK?
Regards , Kenny K2KW
> On Jan 17, 2022, at 11:29 AM, Frank W3LPL wrote:
>
> Hi Kenny,
>
> A very workable alt
Message -
From: "Kenneth Silverman"
To: "topband"
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.
wo 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"
> To: "topband"
Kenny,
I used three large torroid cores, 12AWG silver/teflon wire, and 10
turns/14 turns to match 25 ohms to 50 ohms. There is a picture of the
transformer in my Phasing Switch Box at:
https://www.n6ws.com/projects/
To give you some perspective of size, it is in a 8" x 8" box.
73, Bill
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
_
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