About BL2 Balun

[Pierre]

Hi folks

A question about BL2  Wideband 1:1 & 4:1 (Switchable) Balun. Does it also have some kind of'choking' effect (to reduce or eliminate currents on the outside of the coax)... or is it just a balun (TLT) to transform impedances ?

Thanks
de Pierre VE2PID
Kx1#442, K2 #5170 KX3 # 190

[Don Wilhelm-4]

Pierre,

It is a current choke in either configuration.  Take a look at the
assembly manual and that should be apparent.if you compare the balun
schematic with standard schematics for current chokes.

73,
Don W3FPR

On 9/11/2013 10:26 AM, Pierre wrote:

> Hi folks
>
> A question about BL2  Wideband 1:1 & 4:1 (Switchable) Balun. Does it also
> have some kind of'choking' effect (to reduce or eliminate currents on the
> outside of the coax)... or is it just a balun (TLT) to transform impedances
> ?
>
> Thanks
> de Pierre VE2PID
> Kx1#442, K2 #5170 KX3 # 190
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/About-BL2-Balun-tp7578814.html
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[Pierre]

FB John, but can it 'choke' outside coax currents, like a coiled choke
can do? I cannot see how.. ??

[Don Wilhelm-4]

Pierre,

The turns through the ferrite cores constitute 2 bifilar winding of
sufficient inductance to provide the required choking impedance.

73,
Don W3FPR

On 9/11/2013 10:57 AM, Pierre wrote:
> FB John, but can it 'choke' outside coax currents, like a coiled choke
> can do? I cannot see how.. ??
>
>

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