help identify smd component

[Daxxin]

what rf transistor this , separating the output from circuit i get 3,1 ohm between this pin and gnd ..thats regular?

[andybarrett1]

Looks like a MAR6 or MAR8 type device...

Can you tell us a bit more about the CCT.

BR
Andy

[Daxxin]

thanks for reply , this is IF AMP / LPF stage of anritsu spectrum analyzer , have no output from this stage

[MagicSmoker]

It's not a MiniCircuits MMIC because the input and output traces are reversed (MiniCircuits marks the input with a dot). The most likely candidate I can come up with is a GaAs RF MOSFET, part # ATF-10736. In any event, the resistance between that pin and ground should not be so low.

That said, cutting through the input trace to make that resistance measurement was a bad move, as the trace is designed to act as an impedance matching network at high frequencies (>1GHz). Thus you can expect degraded performance (higher noise floor, more spurs, etc.) even if replacing this part solves the problem.

[Daxxin]

thank you for answer i think is that the component ..alredy ordered.