[Milsurplus] BC-221-AK Looking for DC9 metal can 1000Khz

John Hutchins olegerityincj at austin.rr.com
Fri Feb 27 19:02:00 EST 2009


Callin' Members
Fixin' BC-221-AK reference crystal oscillator drift down with increased 
temperature.
After much advice I am inclined to test a different crystal.  Please 
rattle the junk box. 
In need of a newer type DC-9 1000Khz crystal in Metal Tube Can, with 
Octagonal tube base; The existing crystal has screws on the bottom with 
a retaining plate and rubber gasket.  I remember seeing some that were 
completely sealed.  This is key, need sealed unit no screws please.  
Please contact off list.  I need only 1.  Will post a thanks to the list.
Thanks
Hutch

PS
For those who have been following my travels through the BC-221-AK 
restoration.  The 6pF capacitor is a Black Coated marked with 6 smuge 
smuge mounted across the Crystal tube socket.  After reading much on the 
WW-Web I have come to the conclusion the capacitor is a 6pF ceramic NPO 
type, though it was not indicated as such in any documentation I was 
able to get my hands, eyes, on.





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