[RFI] Ferrite Material

Palomar Engineers Palomar Engineers <Palomar@compuserve.com>
Tue, 4 Jan 2000 00:38:20 -0500

Amidon curves show 77 material best for HF but tests we have made recently
show better performance by 43  material above 7 MHz. Our tests were made
with the Autek meter. I understand that Ed Hare is going to make definite
tests with ARRL lab equipment and will put these on the ARRL site. -- The
core manufacturer uses 43 for most RFI applications including the split
beads. -- Jack, K6NY

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