why don't we have a clock in the orion the back up battery has a timekeeper
in it for date, day,and time. 73 Rod
-----Original Message-----
From: peterhills@comcast.net
Sent: Monday, October 10, 2011 4:57 PM
To: tentec@contesting.com ; barry.n1eu@gmail.com
Subject: [TenTec] Orion backup battery
Subject: [TenTec] Orion backup battery
TEN-TEC Sold me the ST Microelectronics M4T28-BR12SH1 Timekeeper snaphat
lithium cell
for $5 + $3 shipping in January of this year. Note M4T, not Z.
It's [January 2011] data sheet:
http://www.st.com/stonline/books/pdf/docs/13125.pdf was unfound today on
internet.
The DIP Extractor tool pictured in above looked like simple, flat-sided
tweezer to pry it up, with small teeth at ends to prevent dropping device.
[ orion565@yahoogroups.com comments said small screwdriver works]
Its Jan 2011 still available ST Microelectronics Application Note:
http://www.datasheetcatalog.org/datasheet/SGSThomsonMicroelectronics/mXyyqty.pdf
Use- Life appears to be 7-10 yrs. Storage-Life could be much longer
Mine failed Jan 2011 after approx 7 to 8 yrs near-daily use
I hope this as helpful to you as your inputs to the site have been to me.
Pete W0HXB w0hxb@arrl.net
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