[time-nuts] Heated crystal? & Rb tube corrosion (FE-5680A)
Arthur Dent
golgarfrincham at yahoo.com
Sat Dec 10 20:22:25 UTC 2011
The original photo linked to show 'corrosion' didn't have enough detail to
show what was there plus the tungsten color cast made it impossible to tell
what the correct colors were. I received my 5680A today and after checking
it out as received (9.999,999.99675Mhz after 30 minutes), I removed it from
the circuit board and took the bottom plate off to see what mine looked like
inside. The bottom plate and the clear fiberglass sheet looked like there had
been a resistor that fried and sooted up the area. What it appears to be is
either a spray coating or residue from a wash to remove flux. The color is flat
black and it is like a very thin uneven coat of spray paint but it isn't on everything
in the area. The unit may be new or at least like new so it isn't from any part that
fried and the unit works as intended. Bottom line is that it isn't corrosion and I'm
sure it isn't anything to be concerned about. I have attached a photo of the same
area that the original photo covered so you can compare the original photo to
the one I just took and linked to.
original- http://n1.taur.dk/fe5680a-2/IMG_1375.JPG
mine- http://farm8.staticflickr.com/7161/6488370449_a4cb3fc21e_b.jpg
-Arthur
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