Welcome to BG6KHC’s website!
Based on s53mv’s and Scotty’s projects, I have built some modules. As ROS-2150 VCO is expensive and Scotty’s cavity filter is hard to build , so I have built a PLL version of s53mv’s VCO (http://lea.hamradio.si/~s53mv/spectana/vco.html), and built s53mv’s cavity filter by providing drawings to a CNC factory which cost about 10$. Following is some test about my modules.
Scotty’s website: http://www.scottyspectrumanalyzer.com/msaslim.html
My version of scotty’s spectrum analyzer: Spectrum Analyzer
Some other modules here: other modules.
Antenna Analyzer 70MHz: Antenna Analyzer.
1. s53mv’s filter test setup:
By using VCO
ADL5513 is used as a logDet module which is about 80dB dynamic range. However, -30dBm is the noise level because all parts are open in the air.
2. VCO + PLL modules
2) 1950-2050MHz module. Two BFP420s are used in this module. The output power is about +4dBm.
Test on VCO
3. Other modules.
PIC control module
DDS 10.7MHz module ( clone from Scotty’s).
My home lab. I have some old test equipments.