I found Jameco has product in stock for $13 at
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_114260_-1
the data sheet says that each chip has a AABB (year year week week) date of
manufacture string. It appears this is new stock. YMMV
73 ES DX,
Gary -- AB9M
-----Original Message-----
From: Carl Moreschi
Sent: Friday, October 05, 2012 1:03 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Paragon II model 586 questions
I wrote the firmware for the Paragon II. The firmware resides on the
Microprocessor chip not the RAM/ROM/RTC chip. That chip contains all
the non-volatile memory. The memory persists because of the built in
lithium battery. Buying a new chip presents the problem of how long the
new chip has been sitting on the shelf. The lifespan of the battery is
strictly by time and not by usage. A new chip that was made in 1993 is
just as likely to be bad as the one in the Paragon II.
On 10/5/2012 1:57 PM, Mike Bryce wrote:
Well now, I'm not too sure about that.
without looking at the schematic, but I'd guess that this RAM/ROM/RTC has
some sort of firmware installed at the Ten Tec factory.
It's this firmware that gives the Paragon II its personally.
Installed a new "empty" RAM/ROM/RTC to me just wouldn't work.
It's the same reason why you can't put in a new uprocessor in a Corsair II
when the display goes wacky. A new chip, but without the firmware, it
won't work.
mike, wb8vge
On Oct 5, 2012, at 1:31 PM, GARY HUBER wrote:
Looks like Mike nailed it. $20 in parts to fix the problem. See the data
sheet at
http://www.alliedelec.com/images/products/datasheets/bm/DALLAS_SEMICONDUCTOR/70127784.pdf
73 ES DX,
Gary -- AB9M
-----Original Message----- From: Mike
Sent: Friday, October 05, 2012 8:34 AM
To: tentec@contesting.com
Subject: [TenTec] Paragon II model 586 questions
Hello Pete,
Ref the Paragon II
The Dallas DS1220y-200 mem chip on the RAM/ROM/RTC board
at U2 needs to be replaced....
73 Mike
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
--
Carl Moreschi N4PY
121 Little Bell Dr.
Hays, NC 28635
www.n4py.com
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|