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identification of diode and monolithic amplifier

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tomas589

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hi, I need to identify the components in the circuit. Its noise source, old and from china. In left corner it must be zener diode, next to it monolithic amplifiers. If you have experience with these, please let me know.thx
20201128_105804-min.jpg
20201128_105956-min.jpg
 

SMD codes are cleared but they look like old type MAR series ( Mini Circuits ) Monolithic Amplifiers.
However, nobody knows without SMD codes..
 
The schematic of your circuit is similar with the one attached.
This one use Skyorks SKY65017 MMICs, but those are in different package than yours. Perhaps any MMIC amplifier working from DC to 1.5GHz will do the job.
 

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