Topband: 1:2 UNUN

[Frank W3LPL]

Kenny -

Yes, 1/4 wavelength electrical length. 89 feet of RG-11 (not the
foam dielectric version used for CATV)

UHF T connectors are fine, if you need any I'll give them to you.

73
Frank
W3LPL



----- Original Message -----
From: "Kenneth Silverman" <kenny.k2kw at gmail.com>
To: "donovanf" <donovanf at starpower.net>
Cc: "topband" <topband at contesting.com>
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 <donovanf at starpower.net> 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" <kenny.k2kw at gmail.com>
> To: "topband" <topband at 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 
> _________________
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