The 2873000202 73 material binocular core, I buy those by the hundreds from
Newark and hand them out like a human Pez dispenser at local radio club
meetings. They are amazing things. Not only do I use them for 160M and
other RF applications, but I have using them in small step-up applications
too up to the 10W level!!!
Newark also sells them in single quantity. Again, the magic trick is to use
the Fair-Rite part number in the search.
http://www.newark.com/fair-rite/2873000202/ferrite-core-cylindrical/dp/02E8908?mckv=sLlWjcZh9|pcrid|54824053955|plid||[keyword_text]|match|p&CMP=KNC-GUSA-GEN-SKU-MDC-FAIR_RITE
One trick for the sharp-edged cores when used for HV step-up transformers,
is to wind them with kynar wire-wrap wire.
Tim N3QE
On Thu, Nov 27, 2014 at 2:07 PM, Richard (Rick) Karlquist <
richard@karlquist.com> wrote:
>
>
> On 11/27/2014 10:57 AM, Tim Shoppa wrote:
>
>> I would encourage that if you use part numbers on Clifton Labs website
>> that cores/binocular cores of many mixes are stocked and sold in small
>> quantities.
>>
>> If you start from a part number from a catalog, you may very well end up
>> with one that is quantity-500 minimum.
>>
>> I would particularly encourage the 73-material binocular cores if you
>> are doing anything in LF-MF-HF.
>>
>
> The core in question was a 73 binocular core. I believe it was the
> one recommended on W8JI's website.
>
> Rick Karlquist N6RK
>
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