[time-nuts] Monsanto IC

Tim Shoppa tshoppa at gmail.com
Sun Mar 1 11:02:12 EST 2015

Often these parts can be replaced with MSI TTL counter/decoder/logic chips
with just a slight change in wiring.

I don't know if the SD102 is the Nixie driver, but there are substitutes
for Nixie drivers too.

I don't know exactly what the SD102 does, but if your friend has the
Monsanto 110B schematics he can see what the chip does and how to
substitute for it.

Tim N3QE

On Sun, Mar 1, 2015 at 10:13 AM, jim s <jwsmail at jwsss.com> wrote:

> Hi,
> I have  friend with a question about an IC badged with Monsanto.  I
> googled a bit and found that there is a big line of older maybe 60's era
> counter / timers which were made and badged Monsanto.
> I am asking here if anyone has some of these or have a knowledge of
> whether they may have custom IC's.  It isn't out of the question that this
> is a custom front end part, or perhaps some part of a timer circuit they
> may have developed.
> The ebay link to the part is below, as is a search string for monsanto on
> Tucker Electronics manual web page.
> The question if for a friend who has the IC for sale.  Any info
> appreciated.
> thanks
> Jim
> http://www.etestmanuals.com/Search.aspx?Mfg=MON
> Ebay listing for a monsanto counter / timer
> VINTAGE-Monsanto-110B-Programmable-Counter-Timer-/
> http://www.ebay.com/itm/331268326313
> Monsanto IC:
> Monsanto-SD102-Vintage-Very-Rare-White-Ceramic-Gold-Zebra-Grey-Trace-IC-/
> http://www.ebay.com/itm/371270297731
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