As I recall, Jim is using 73 mat'l cores. I'd be interested to see what sort of magnetizing inductance he would have looking into the 2-turn primary and what its reactance is at 1.8 MHz.
Charlie, K4OTV -----Original Message----- From: Topband [mailto:[email protected]] On Behalf Of Mike Waters Sent: Thursday, August 22, 2013 11:21 AM To: James Rodenkirch; topband Subject: Re: Topband: Two 2:1 transformers to choose from!! P. 7-69 of Low Band Dxing (5th ed.) by ON4UN says a maximum of 4 turns on the low-Z primary for binocular cores. It might work, but there are other turns ratios you might try. Here is a list of turns ratios for those cores I made: http://www.w0btu.com/Binocular_core_turns_ratios.pdf If you get a 500 Server Error message, contact me directly and I'll e-mail it to you. 73, Mike www.w0btu.com On Wed, Aug 21, 2013 at 3:49 PM, James Rodenkirch <[email protected]>wrote: > I received enuff "info" and thoughts to know I'll utilize the 5:7 winding > version. > _________________ Topband Reflector _________________ Topband Reflector
