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 < [email protected]> 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 > _________________ Topband Reflector Archives - http://www.contesting.com/_topband
