[R-390] Crystals

[John Vendely]

I buy custom crystals of a variety of types from International on a 
pretty regular basis, including some I received just a few weeks ago for 
a TMC frequency synthesizer. They're very easy to work with.  Providing 
a proper spec for a custom crystal is the primary stumbling block for 
most folks.  If it's for military equipment you can usually provide the 
crystal's "CR" designator and the oven temp, if applicable, (e.g. 
CR-27/U at 70deg. C) which greatly simplifies things.   International 
has a full set of military crystal specs and can work from that.  They 
also have crystal specs on hand for a pretty wide variety of commercial 
equipment, and may have a spec for R-390A crystals.

73,

John K9WT

On 12/13/2014 3:52 PM, W2xj wrote:
> Are sure they still do this? Someone on another list says he called and they said they don't do it anymore. Insight?????
>
> Sent from my iPhone
>
>> On Dec 13, 2014, at 12:09 PM, Craig Heaton <hamfish at efn.org> wrote:
>>
>> International Crystal still does. The package may be different, but the pin
>> diameter and spacing is the same. Pricey!
>>
>> Craig,
>>
>> -----Original Message-----
>> From: R-390 [mailto:r-390-bounces at mailman.qth.net] On Behalf Of W2xj
>> Sent: Saturday, December 13, 2014 10:31 AM
>> To: amradio at mailman.qth.net
>> Cc: 390 list
>> Subject: [R-390] Crystals
>>
>> Does anyone know who, if anyone, still makes custom crystals?
>>