Hello Rik, I am using T225-2B's in the LPF for my portable 500 kHz TX. @ 500W output they stay cool. 73, Albert PA0A See: http://partsandkits.com/toroids.php -- Original Message -- From: Rik.Strobbe@
Dear all, does anyone have experience with T200-2 cores (amidon) for 500kHz lowpass filters ? Up to what power are they suitable ? 73, Rik ON7YD - OR7T
Warren, thanks for the hint. I just had a look and Jay actually uses T225A-2 toroids. The "A" means almost double height (and thus almost double cross sectional area). But Jay states that "Both filte