Help identify microwave transistor logo

[maxwell3e10]

Does anyone recognize this manufacturer's logo on microwave transistors? Can't seem to find anything.

[Neomys Sapiens]

Exodus Advanced Communications

[maxwell3e10]

Thanks! Was looking for it for a long time. But it seems they sell only microwave systems, not individual transistors. The actual amplifier module is from IFI. I wonder what are my chances of getting a datasheet or replacement for that transistor.

[Neomys Sapiens]

Maybe someone (experienced sales and/or application engineer) at RFPD (Richardson) or another specialised distributor could help you. Or ask at everythingrf or mwrf.com whether anyone knows who took that product line or who made them really..

[coppercone2]

I wonder how hard it would be to find a new one that you can put in there.

Are they that different from each other? I would expect maybe some noise figure irregularity or something.. I wonder how tuned the circuits are to the transistors. Sometimes I wonder how different it is from hacking a toilet flush system (like a transistor it goes into 'latchup' (permaflush) if you don't bound it etc..

[maxwell3e10]

I am far from microwave expert, in fact this is the first module I popped open. Here are some pictures of the module. It is labeled as IFI, but it looks very similar to AMP1124 from EAC, which would explain the transistors.

The symptom is that there is no output and no significant current draw. My current plan is to turn it on and probe with a high impedance scope probe around the input section. But having never opened one of these I wonder if there is a danger of feedback with cover open, so maybe I should screw down the cover so it covers the output section. Also can check the bias voltages, but first I need to learn what they are supposed to be...

[coppercone2]

well it might not be the transistor.. you know it can be a cap

with solder tweezers I really think that checking every single cap on complex stuff is the way to go lol

pull test mark with sharpie resolder and go through the whole thing, cleaning after you test a cluster of components.

maybe its just me, but the soldering on some of those passives looks kinda dodgy... 

IDK the deal with the PCB though, is it copper metalization, or silver? In that case silver or copper bearing solder would help. So you don't dissolve traces