[TowerTalk] 2:1 Transmission Line Transformer

[Joe Subich, W4TV]

Almost certainly a 2.25:1 un-un or a five winding toroidal
transformer.

73,

    ... Joe, W4TV


On 6/27/2011 11:31 AM, Barry N1EU wrote:
> Steve, it was a balun for matching their quads and delta loops to
> 50-ohm coax and was magically compact (~3in diam X 2in high).
>
> Perhaps I need to find one and dissect it.
>
> Barry N1EU
>
> On Mon, Jun 27, 2011 at 11:11 AM, Steve Hunt<steve at karinya.net>  wrote:
>> Barry,
>>
>> I wonder if it was an UnUn rather than a BalUn. Sevick shows a simple 2.25:1
>> UnUn transformer comprising a trifilar winding on a single core.
>>
>> I can't think of any way you'd do a true 2:1 TL Balun with a trifilar
>> winding on a single core!
>>
>> 73,
>> Steve G3TXQ
>>
>>
>> On 27/06/2011 15:53, Barry N1EU wrote:
>>
>> Lightning Bolt used to offer a compact 2:1 balun that was described as
>> a "transmission line transformer that is trifilar wound on a ferrite
>> core."
>>
>> Can anybody direct me to details on such a single core design?  I've
>> searched the Web and Sevick's books with no success.
>>
>> Thanks/73,
>> Barry N1EU
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