[time-nuts] Custom Quartz crystals

[cdelect at juno.com]

Thanks for the advice, I'll see if those companies can help.
I am wanting to replicate the oscillator circuit  at
http://www.wa1mba.org/PLLVCXO/stephensen.pdf
but at 60Mhz. The article specifies...

"Y1 is a
fifth-overtone, AT-cut crystal ground
for operation in the series-resonant
mode with a load capacitance of 30 pF"

I thought that a series resonant crystal did not have a load
capacitance??

I'll send this info along to the Crystal manufacturer and see what they
say.

I had bought an FE 2216A OCXO oscillator of eBay a couple years ago
thinking of this same project however it has a 120Mhz output.
I read that a lot of these higher frequency oscillators had a fundamental
that was doubled.
So I opened it up hoping to find a 60Mhz crystal.
Once the potting was removed I could see a Minicircuits doubler on the
bottom of two boards and scopeing it showed 60Mhz in!
However the oscillator/oven board has a 5Mhz SC cut crystal and a hybrid
module that gets it up to the 60Mhz! See PIX.

While trying to find a crystal I'll use this board to test out my scheme!

Cheers,

Corby
-------------- next part --------------
A non-text attachment was scrubbed...
Name: FE2216aOCXO.jpg
Type: image/jpeg
Size: 50673 bytes
Desc: not available
URL: <http://febo.com/pipermail/time-nuts_lists.febo.com/attachments/20220814/edc6a45d/attachment.jpg>