tag:blogger.com,1999:blog-35901825.post8831371166464858637..comments2024-03-19T06:03:40.451+10:00Comments on marxy's musing on technology: uSDX - Modern multi-mode SDR radio with class E outputPeter Markshttp://www.blogger.com/profile/13007012724570360389noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-35901825.post-57815584929305788992021-09-05T02:50:12.682+10:002021-09-05T02:50:12.682+10:00OK so I just stumbled onto this blog by accident a...OK so I just stumbled onto this blog by accident and I see the little rotating globe map with the post and tagged Hill City S.D. and I'm in Custer, S.D... I have been wanting to build a radio for a long time. I started with plans to do uSDX Tri/Octo but as I was collecting parts, some guy in Minnesota was looking for a 74ACT00 of which I have extras and he was offering to trade an 8 band RF Anonymoushttps://www.blogger.com/profile/11082344038568146689noreply@blogger.comtag:blogger.com,1999:blog-35901825.post-19986458987717712032020-10-11T16:34:10.024+10:002020-10-11T16:34:10.024+10:00After you build it, take a close look at the outpu...After you build it, take a close look at the output on a spectrum analyser - you mightn't be so impressed. The class-E output stage of the QCX doesn't have very good amplitude control, so the uSDX is going to have issues with out-of-band transmissions due to that (and its limited phase rate - a limitation of the Si5351).Clifford Heathhttps://www.blogger.com/profile/09758966093769997432noreply@blogger.comtag:blogger.com,1999:blog-35901825.post-51219726160713318272020-10-11T02:30:17.875+10:002020-10-11T02:30:17.875+10:00Hi Peter,
I just received my V 1.02 boards also o...Hi Peter,<br /><br />I just received my V 1.02 boards also only mine are blue. As it turns out I had 90% of the parts in stock so I'm waiting for a few things from Digi-Key to finish it up. I look forward to finishing it and play around with it. Have fun.<br /><br />Joel<br />N6ALTcaulktelhttps://www.blogger.com/profile/10779271046772673688noreply@blogger.com