[sergey23 0]

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?
 

[1113 6]

can you watch LDO output voltage by oscilloscope?

[Точка Опоры 34]

Where you trimmer at schematic and resistor values?

Which load at output?

[sergey23 0]

Hello, Is there a better way manually changing the voltage?

maybe some other type of trimmer to use with a regulator?

Thanks.

Изменено 10 часов назад пользователем sergey23

[A.V.Avtomat 22]

У него там индуктивная нагрузка, электромагнит, звенит в его примитивной схеме управления.

Схема не годится, нужен регулируемый источник тока на ОУ и БТ.