Have a look at http://active-antenna.eu/ This is a prebuilt and tested external amplifier and control. Lots of information on the site. Mike G8ALS -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20120929/d720b211/attachment-0002.htm>