[time-nuts] Comments on Tbolt deal?

Bob Camp lists at rtty.us
Mon Jun 7 07:51:36 EDT 2010


Hi

It's also amazing that the laser marking systems seem to get worse and worse at marking parts legibly....

Bob


On Jun 6, 2010, at 10:25 PM, Steve Rooke wrote:

> Arthur,
> 
> On 7 June 2010 02:21, Arthur Dent <golgarfrincham at yahoo.com> wrote:
>>> On 6 June 2010 09:42, Arthur Dent <golgarfrincham at yahoo.com> wrote:
>>>> 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".
>> 
>>> What happens when you have a TB dated 7/11/03 with a thermometer chip
>>> that is labelled:-
>> 
>>> DS1620
>>> 031001
>>> 810AA
>> 
>>> No other markings?
>> 
>>> Thanks,
>>> Steve
>> +++++++++++++++++++++++++++
>> Steve, If you check closely I think you'll find that the line you read as
>> "031001" is actually 0310D1" where the 5th character is a capital "D".
>> The 03 is the year and the 10 may be the month of the year. The D1 is
>> the revision code. The "C" version was before maybe 2000  so you  won't
>> see those unless they are used as replacements and the "E" revision
>> wasn't used until late 2004.
> 
> Many thanks for your excellent explanation of this. Seems my old tired
> eyes even with a magnifying glass were not up to the task. It's ironic
> that the older we get the smaller they make the parts.
> 
> Best regards,
> Steve
> 
>>                                         -Arthur
>> 
>> 
>> 
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> 
> 
> 
> -- 
> Steve Rooke - ZL3TUV & G8KVD
> The only reason for time is so that everything doesn't happen at once.
> - Einstein
> 
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