[time-nuts] M12+ Temp sensitivity
Normand Martel
martelno at yahoo.com
Wed May 3 02:13:09 UTC 2006
I may be the 259th to ask you, but do you have a date
when the new M12M will be officially available?
I almost have bought a "Resolution T" a few weeks ago
when i heard about the M12+ and it's successor, the
M12M. Now i'm waiting! Well... I know... this is a
forum about time... ;-)
Have a good day!
73 de Normand Martel VE2UM
Montreal, Canada
...Too bad! The Habs have lost against Canes!
>Said,
>Hey! Whaddya mean CHEAP? The marketing guys call it
>feature laden and cost effective!
>Anyway, you're right. The M12+ is extremely sensitive
to environmental
>stimuli. On our receiver/adapter board assemblies I
actually include a
>piece of foam tape between the two boards that gives
the crystal
>(crystal, not TCXO) some isolation from the outside
world. The old
>original M12's actually worked better in this respect
because they were
>in a normal crystal can which lengthened the thermal
time constant
>enough that temperature perturbations weren't a
problem. The SMD Rakon
>crystal used by current M12+'s just doesn't have any
sense of humor
>when it comes to temperature changes.
>The new M12M's DO HAVE a Rakon TCXO and are a lot
more
>insensitive than the M12+'s.
>Randy
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