yefj
Advanced Member level 4
Hello ,I have a very weird phenomena my YIG has a tune input.
When I used LD1084 regulator and one of the resistors was a trimmer even thow i put 10uF capacitors on the output and input .
When i try to tune my voltage going into the YIG the YIG starting to jumps 300MHZ 500MHZ back and forth.
So i suspect the TUNE voltage have jumps of 1V at least.
I suspect that when I changed the trimmer value it created this behavior.
A basic voltage divider get my YIG better stability then this thing.
1.Am i correct in my assumption?
2. Why the trimmer could create such a thing?
3.what could be manual tuning alternative for changing of resistor?
When I used LD1084 regulator and one of the resistors was a trimmer even thow i put 10uF capacitors on the output and input .
When i try to tune my voltage going into the YIG the YIG starting to jumps 300MHZ 500MHZ back and forth.
So i suspect the TUNE voltage have jumps of 1V at least.
I suspect that when I changed the trimmer value it created this behavior.
A basic voltage divider get my YIG better stability then this thing.
1.Am i correct in my assumption?
2. Why the trimmer could create such a thing?
3.what could be manual tuning alternative for changing of resistor?
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