LibreVNA 100Khz to 6Ghz VNA may be worth watching.

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BillC

Guest
Looks interesting , see the three quad diode mixers in the lower foreground of version # 2 board . Good jiggers diode mixers! .
 
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BillC

Guest
Those things might not be mixers , might be coupling transformers.
 
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VK3YNV

Guest
I think you are spot on there Bill, I haven't checked the schematic, but they look like tiny transformers.
 
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BillC

Guest
Hi Ray . Its a bit hard to work out what is really going on with the front ends/ports , the block diagram and the description show 50 ohm resistive RLB's and suggests the advantage of wide band frequency response presumably fairly flat over the desired range , they might have trimmed the response with track layout and design too . Thanks for the discussion . The device certainly looks like something to watch out for as time goes on. Cheers .
 
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