🇺🇦 haxadecimal 🚫👑
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
Apr 7 at 4:51amWeb
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 🚫👑Apr 7
@bitsavers
I forgot all about EEM. Great idea!
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

Index of /components/unitedTechPubs

Show threadJohn Carlsen 🇺🇸🇳🇱🇪🇺Apr 7

@brouhaha

I recall using them in 1991 on the Media Vision Pro Audio Spectrum.

KDS (Japan) and Raltron are the brands I see on those assemblies.

Show thread🇺🇦 haxadecimal 🚫👑Apr 7
@johnlogic
I think I used CTS Knight, Fox (now Abracon), and ECS in the early 1980s. I'm trying to find earlier history of that oscillator type.
Show threadJohn Carlsen 🇺🇸🇳🇱🇪🇺Apr 7

@brouhaha

I'm interested in learning more too.

I found this to narrow it down:

"In 1968, Juergen Staudte invented a photolithographic process for manufacturing quartz crystal oscillators while working at North American Aviation (now Rockwell) that allowed them to be made small enough for portable products like watches."

But that just refers to the crystals that were put in cans, not the integrated oscillator circuit. (I also learned that I've been using the wrong class code on my PCB references; they should be Y and G, respectively.)

https://en.wikipedia.org/wiki/Crystal_oscillator

Crystal oscillator - Wikipedia

Show threadbitsavers.org4d ago

@brouhaha

scanning the 5000 page 1975 EEM is taking a while. here are three companies selling 14 pin osc cans back then.

The annoucement for the K1100A is in May 1974 issue of Electronics on page 122. JKTO-80 annouced in Nov,1974. I also just discovered someone scanned EEM 1975 https://archive.org/details/electronicengine00unse_5/