All,Watch your drain current on 630m. The transformer reactance is a bit low for 500khz.Type 43 might be a better core material. Frank WA1GFZ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20161205/ff341dff/attachment.htm>