[time-nuts] Glass Envelope Quartz Crystals

Bob Camp kb8tq at n1k.org
Tue Feb 2 17:39:33 EST 2016


Hi

Anything that causes “delta C” between the leads is probably a bad idea. Most
3D printing materials are relatively unstable as capacitor dielectrics. 

Bob

> On Feb 2, 2016, at 10:51 AM, Daniel Watson <watsondaniel3 at gmail.com> wrote:
> 
> Hi,
> 
> I have added a picture of the bottom of the 5 MHz crystal. The other one
> has a similar pin arrangement, two pairs twisted and soldered together,
> except they aren't cut as short. The seller indicated they were
> manufactured in Russia for military use.
> 
> If a suitable socket cannot be found, I thought about 3D printing little
> stands for them to sit on when soldered to a board.
> 
> Dan
> 
> On Tue, Feb 2, 2016 at 6:54 AM, Tim Shoppa <tshoppa at gmail.com> wrote:
> 
>> Interesting! Date code from the 90's? Russian, right?
>> 
>> They certainly look like common 7 pin miniature tube pattern.
>> 
>> But unlike a real 7 pin tube that actually has stiff Cunife or Fernico
>> pins, it looks like you have just tinned wires out the bottom of yours, and
>> your pics don't show the bottom of the tube, but it looks like outside the
>> glass the wires from two different pin-holes are wrapped together?
>> 
>> For testing purposes I don't see any problem using a 7-pin miniature tube
>> socket if you have it on hand and carefully inserting the pairs of twisted
>> wires into the socket holes.
>> 
>> But for more permanent use seems to make more sense to solder the pins to a
>> PCB if they are tinned already.
>> 
>> Tim N3QE
>> 
>> On Mon, Feb 1, 2016 at 9:58 PM, Daniel Watson <watsondaniel3 at gmail.com>
>> wrote:
>> 
>>> Hi,
>>> 
>>> I purchased a pair of interesting glass envelope crystals for a project.
>>> Here are some pictures:
>>> 
>>> 
>> http://syncchannel.blogspot.com/2016/02/glass-envelope-quartz-crystals.html
>>> 
>>> Does anyone have an idea about what mount/socket I should buy for these?
>> I
>>> read a previous thread on the list about Bliley crystals using a B7G
>> mount,
>>> but I'm not sure if that type might work here.
>>> 
>>> Also, when building up a circuit to make these oscillate, are there any
>>> specific differences about crystals in this package that I should keep in
>>> mind?
>>> 
>>> 
>>> Thanks much,
>>> 
>>> Dan W.
>>> _______________________________________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to
>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>>> and follow the instructions there.
>>> 
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
>> 
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.




More information about the time-nuts mailing list