On 8/28/2012 12:28 PM, Tom W8JI wrote:
> Generally a 1:1 ferrite core balun has the least problem with grossly
> mismatched impedances, the widest useable frequency range, and the best
> balance for a given size and cost.
In this tutorial http://audiosystemsgroup.com/RFI-Ham.pdf
There are gr
I think what you want is an un-un...not a balun. It doesn't sound like
there are any balanced elements in your system.
Perhaps something like this:
http://www.balundesigns.com/servlet/the-Ununs/Categories
On 8/28/2012 1:29 PM, Eddy Swynar wrote:
> Good Day All,
>
> I am thinking of incorporat
gust 28, 2012 1:36 PM
> To: Eddy Swynar
> Cc: topband@contesting.com
> Subject: Re: Topband: Wideband Balun...?
>
> On 28/08/2012 19:29, Eddy Swynar wrote:
>
>> I am thinking of incorporating a homebrewed 4:1 balun as part of a
>> transmatch that I have here, which was
The Heathkit Balun is not robust at all, the coils are close-spaced and
made with #18 or #20 wire. I had one as a young ham in the 60s and was quite
disappointed with the physical construction. I'd not recommend going to
the bother of hunting one down. Over the years, I've designed a lot o
...@contesting.com]
On Behalf Of Tom W8JI
Sent: Tuesday, August 28, 2012 12:28 PM
To: Topband@contesting.com
Subject: Re: Topband: Wideband Balun...?
Hi Eddy,
> I am thinking of incorporating a homebrewed 4:1 balun as part of a
> transmatch that I have here, which was designed to feed coaxial
>
Eddy Swynar wrote:
>
> Is there really & truly such a thing as an air core 4:1 balun that will
> cover the entire spectrum from 1.8- to 29.7-MHz...? I've looked & I've
> repeatedly searched on the internet, but can not quite come up with such
Basically, you are describing the old Heathkit balun.
Hi Eddy,
> I am thinking of incorporating a homebrewed 4:1 balun as part of a
> transmatch that I have here, which was designed to feed coaxial cable-fed
> antennas only...
Why did you decide on a 4:1? Generally a tuner matches a much higher
impedance than a 4:1 balun will safely permit, and
On 28/08/2012 19:29, Eddy Swynar wrote:
> I am thinking of incorporating a homebrewed 4:1 balun as part of a transmatch
> that I have here, which was designed to feed coaxial cable-fed antennas
> only...
>
> Is there really & truly such a thing as an air core 4:1 balun that will cover
> the ent
Good Day All,
I am thinking of incorporating a homebrewed 4:1 balun as part of a transmatch
that I have here, which was designed to feed coaxial cable-fed antennas only...
Is there really & truly such a thing as an air core 4:1 balun that will cover
the entire spectrum from 1.8- to 29.7-MHz...?
