Technical Mallory "box"

Hello
I have had this box (see pics) on stock maybe 15y.
Now found it from my stock and bring to my office.

What is it?
what Year?

I have send twice email to Mallory, but they are so hurry with "social media" , not answered.


Aulis

 

looks like the amplifier for an early optical trigger ignition system.

If you can take a few clear pictures of the insides, we might be able to figure out the year from the date codes on the transistors, etc.

Probably mid 60s-early 70s?

 

I would bet at least 10 to 20 yrs earlier (late '40s to early '50s) just by the way the box is built.

 

Did you read what the box is? I don't think they were around back then.

Just because Mallory built some stuff in old fashioned ways, doesn't mean they had technology before it was actually available.

 

I'd say mid-late 50s; transistors had appeared by then (the first EFI systems were marketed in '57). Definitely pre-integrated circuit, may not be an automotive application but something industrial or military.

 

the patent was applied for in 1969 and granted in 1972.

 

found this product announcement...1970....

seriously, don't you guys collect old electronic stuff, and know all about it?

I even have a few vacuum tube wrist watches.

 

Thank You for Your info. I was try to see dates inside, but only component numbers.

I do not want to open nets, becasue those are installed with small rivets.

Here 2pics more.

Aulis

nb. I have had in my ex drag race cars old MSD boxes. 7A boxes from MSD early production. Serial number had 4 or 5 zero and then 3 nr serienr. Old MSD logo,.... Those were work fine. Minus thing was missing RPM limit....

Maybe I install this Mallory to my next 1932 Henry Ford hot rod. All other parts are original or Speed parts from 40s,...

 

Just a tip...anything old with either electrolytic or tantalum capacitors don´t like to be waken up fast after sleeeping 15+ years.
Either exchange them for fresh ones or atleast hook them up to a voltage supply and slowly ramp up the voltage with the current limiter keeping it from frying if they don´t want to work with you.

 

The first picture, the round thing on the right side is a transistor. It might have a date code, that would be something like 7125 which means the 25th week of 1971. Sometimes other components have a similar number.

The part number on the transistor might be something like 2N1234

 

yeah, I have the Woz version. As well as one of the three prototype Cathode Corner watches (shown below), and also a new one with the squarish case, and rechargeable battery.