DuWayne's Place

I changed the display from a 1.44" 128x128  TFT ti a 1.8" 160.x128 TFT.  Unfortunately they use different driver chips so I had to...

One of my projects needs a 70Mhz. Low Pass Filter.  I plan on using air wound coils for its construction.  Only problem is that my RLC meter...

When I first did the SNA Jr, I used my existing Antenna Analyzer software.  After playing with the Chinese SNA, I decided to do a rewrite of...

After looking at documentation for several versions of the BITX and others based on the original design, I decided to use the circuit of the...

One of the functions available in the software for the Chinese SNA is the ability to measure SWR using a Return Loss Bridge.  When I was la...

First thing I had to do after I received the Chinese SNA was its internal calibration. To calibrate the system you will need an in-line at...

I had finished the SNA-JR,  because of  its size and ease of use I was very happy with it for doing basic filter testing.  There are some th...