Category Archives: crystal filter

Crystal filter analysis, SW40

I’ve been away from the blog for quite awhile, mainly because I ran into several roadblocks which stymied my progress with the SW40 build and analysis. I really wanted to re-visit the type of analysis I did when I built … Continue reading

Posted in crystal characterization, crystal filter, SW-40, TAPR VNA, Wes Hayward | Leave a comment

Crystal analysis and the Bitx20 crystal filter

I thought I’d really delve into crystal filter analysis now.  I’ve been looking at it off and on for the last few weeks but now I’ve decided it would be good to compile some of my learnings for future reference … Continue reading

Posted in bitx20, crystal characterization, crystal filter | 1 Comment

PY2OHH’s “Pititico” and 1/4 watt, but no rx?

Bill Meara strikes again! Looking at Bill’s blog entry for April 8, 2014, I saw this neat little circuit.  I thought, “hey, I just etched a new board with my dots, and this would be a quick and fun little … Continue reading

Posted in Bill Meara, bitx20, crystal filter, VNA | 5 Comments