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Heterodyne RF generator

 

Hi,
I am LW1ECP, this is my 1st post. I love to design and build anything at home, my main limitation is lack of time to make solder smoke.

I'd like to build a sweeper for my home bench. I have an unused Si5351 board but it generates squarewaves. I could purchase one based on the AD9851 but its range is more limited. I know there are more advanced alternatives but importing in my country has important restrictions and taxes at present.
Where I worked in the late 70s, I used to play with a Wavetek 2000, a sweep/signal generator covering 0 to 1400MHs in 3 bands. It was based on heterodyning two oscillators. So I thought about building something like that. For now it could cover 0 to 200MHz, with DIY VCOs and mixer.

I got tired of searching the web for something like that.?Trying to duplicate the Wavetek circuit is quite involved. Can anyone point me to a more modest design?

Thank you.
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