Operation at cold temperatures and YIG performance
Operation at cold temperatures and YIG performance
(OP)
Can anyone shed some light on this subject? We have a customer that wants to operate our product at -35C but it was designed only for 0C. I suspect the weak point will be the YIG performance but can't seem to find anything on this! Would there be any other concerns, for example, parts with plastic cases or CTE mismatches?
TIA for your help!
TIA for your help!
Tunalover





RE: Operation at cold temperatures and YIG performance
RE: Operation at cold temperatures and YIG performance
RE: Operation at cold temperatures and YIG performance
Just because it works one time at whatever temp does not mean it will next time. I have seen many mfg's go with route one and to me, this is not the correct way. You would be surprised how many choose this route. I suppose if the product is generating enough heat, it may never get this cold (if power left on).
Chances are, most of your electronics are rated 0-70C or maybe -20 - 70. Mil spec parts are probably what you need.
RE: Operation at cold temperatures and YIG performance
Electrolytic capacitors may have a problem with the electrolyte.
Batteries in memory backup applications may not work to full spec.
Timing on high speed logic circuits may change enough to cause failures.
Resistors, NP0 ceramic capacitors, diodes, X7R capacitors should be ok.
RE: Operation at cold temperatures and YIG performance
itsmoked-
You said "What is designed for 0C normal operation that would possibly care about warm room temperature??" Who said anything about warm room temperature?
Tunalover
RE: Operation at cold temperatures and YIG performance
Yes the YIG won't be happy.. However most makers will qualify their crystals at lower temps if requested. I have gotten xtals rated at -40C. Yes, the plastics may have a problem. They may get a lot more brittle too. Everything logbook mentions is right on. Coming back from those temps is nastly as a ton of condensation can occur, especially if the product is like a service tool in and out of buildings.
Label adhesives my fail.
RE: Operation at cold temperatures and YIG performance
You can find standard micro crystals with this temp range pretty easily. Not sure what the availability will be with the crystal your looking for.