[time-nuts] Comments on Tbolt deal?

Arthur Dent golgarfrincham at yahoo.com
Sat Jun 5 21:42:49 UTC 2010

After about mid 2004 the DS1620 thermometer chip was the "E" 
version that displays the temperature in steps of maybe 1 degree. 
I've replaced a few of these chips with "C" versions that correct the 
graphing problem and make the T-bolts work properly. Unless you 
want to find and replace the surface mount chip yourself, make 
sure any late model (after mid 2004) t-bolt has a "D" or a "C" chip, 
not an "E".

The older T-bolts before ~2001 had Version 2.2 firmware which I 
understand isn't as much of a problem as the Piezo brand oscillator 
they had. Others have commented this oscillator isn't that great. 
The new T-bolts have Trimble branded oscillators which are much 



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