FWIW, I added some slow shutter speed photos of the DXD stroboscope in operation - http://www.navy-radio.com/tty/test/ts652-dxd.htm#strobe Nick England K4NYW www.navy-radio.com -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20180425/6353c002/attachment.html>