🇺🇦 haxadecimal 🚫👑Apr 7
Dear lazyweb,
Does anyone happen to know what company introduced the first TTL-compatible metal-can hybrid crystal oscillator in the DIP footprint (like a 14-pin DIP footprint, but with only the four corner pins), and when?
My web searches don't seem to yield relevant results. I'm not looking for the history of crystal oscillators in general. I think the type I've described appeared in the 1970s.
#hybrid #dip #crystal #oscillator
Show threadbitsavers.orgApr 7

@brouhaha

Northern Engineering Labs or one of the other crystal makers around the Chicago area. Motorola also made them.

also check the Electronic Engineering Masters on bitsavers.

Show thread🇺🇦 haxadecimal 🚫👑
@bitsavers
I forgot all about EEM. Great idea!
Apr 7 at 5:49amWeb
Show threadbitsavers.orgApr 7

@brouhaha

the moto LOCOII osc came out in 1978

Show threadxlengineer1Apr 7
@bitsavers @brouhaha I'm surprised that the temperature range was in Celsius degrees.
Show thread🇺🇦 haxadecimal 🚫👑Apr 7
@xlengineer1 @bitsavers
In the US, electronic component and subsystem temperature specifications went metric by the mid 1960s.
Show threadarrakeen_urbaniteApr 7
@brouhaha @xlengineer1 @bitsavers Is it because it helped avoid a third digit in temperature displays?
Show thread🇺🇦 haxadecimal 🚫👑Apr 7
@arrakeen_urbanite @xlengineer1 @bitsavers
Unlikely.
Show thread🇺🇦 haxadecimal 🚫👑Apr 7
@bitsavers
I ran across the CTS Knights ad for their MX-O40 in the October 25, 1978 _Electronics_, p266. Duty cycle spec was awful!
Show thread🇺🇦 haxadecimal 🚫👑Apr 7

CTS still makes oscillators to this day, including the MXO45, an improved-spec replacement for the MXO-40 they advertised in 1978. Of course, they make modern surface mount oscillators as well.

TIL: CTS was founded in 1896 as the Chicago Telephone Supply Company.

Show threadzl2todApr 7

@brouhaha

https://ieee-uffc.org/contact/juergen-staudte

Juergen Staudte | IEEE UFFC

Show threadbitsavers.orgApr 7

@brouhaha

there were a LOT of crystal companies in northern IL and southern WI. one of my teenage electronic mentors started NEL in Burlington, WI.

Show threadbitsavers.orgApr 7

@brouhaha

and dummy-me forgot EEM is under http://bitsavers.org/components/unitedTechPubs

I just bought a copy of vol 1 and 2 of 1975-76 to gap-fill

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