Free glass crystal

[W7TFO]

Yep, it is all glass.  I've not seen but one other of these, was used in a BC FM exciter.

Cut for 88.3 MHz.  More or less a HC6/U size.

Free to the first ham that can tell me how it will live again.  Divide & conquer?

73DG

[kf4qkr]

Thats realy cool . I have seen a lot of crystals but never one like that. It needs to be in a glass case on display in some radio museum somewhere.Thanks for sharing that with us.                                                    73s Mike

[Opcom]

In a Collins 310Z-2 FM exciter? Honestly I don't know if it would work in that or not, but the exciter is here. That crystal ought to go to a collector, very pretty!

[WA1GFZ]

I have a few like that I don't think they are very rare

[Dave KA2J]

Very cool.  Here's one that is in a glass vacuum tube!
Dave KA2J

[W7TFO]

That is special! 

I have several from BC rigs that are glass-envelope octal based jobs, same size as a 6146. 

I suppose the vacuum surrounding them eliminates any oxidation or corrosion of the metallic plating, and adds a bit of temp stability like a thermos bottle.

73DG

[kg8lb]

That is a real beauty. Would look fine in a breadboard educational crystal ascillator circuit.

 I could use it in my pirate FM transmitter !  The PLL died and the TX went QRT after 20 years continuous 24-7 service.  

  Seen quite a few of the miniature tube version . The HC-6U glass is fairly uncommon IFAK.

  But I don't really need the crystal  

[W7TFO]

Well, send me your addy and it's yours!

73DG