Very Cool 142.560 Crystal Module

[Terabyte2007]

I found this old but incredibly well built oscillator module last week, it is 142.560 MC. Yes, it's nomenclature is "MC", "Mega Cycles". It has a US stamp, possibly Navy on the side. I think this was before my time, but I would like to know more about it. If anyone used these or can give me a few more details as to what application it was used in that would be wonderful! The case is solid metal with a spring plate and thick metal cap. There are a couple plates inside and what looks to be a dielectric material of some sort along with the piezo material or ceramic material? It also has 3 pins, one marked (G) Ground and 2 others marked (1) and (2).

[Rory]

It's a crystal for an AN/ARC-4 or WE-233A VHF radio.
A quick Google search comes up with:
http://home.earthlink.net/~navyradio/id5.html
http://www.maritime.org/tech/radiocat/arc4.htm

This is a cool component in that it actually contains two crystals - one for the transmitter and one for the receiver. That is really rare.

[Terabyte2007]

It's a crystal for an AN/ARC-4 or WE-233A VHF radio.
A quick Google search comes up with:
http://home.earthlink.net/~navyradio/id5.html
http://www.maritime.org/tech/radiocat/arc4.htm

This is a cool component in that it actually contains two crystals - one for the transmitter and one for the receiver. That is really rare.

Thanks for the info. I love this old tech. It really cool to see how engineer's in the past designed technology.