Mike,
Ouch!
Not opening before they say OK seems like a good strategy.
I just wanted to share that little story even if it doesn't help you.
It was worse when I got a BVA with *crushed* thermo-flask. I was
actually given a replacement thermo-flask within a few days from OSA.
Cheers,
Magnus
On 03/06/2016 02:15 AM, [email protected] wrote:
Magnus,
In this case, the rattle is not of light weight pieces, but of a heavy object.
So, I am guessing that the outer oven broke off somehow. Won't really know
until and unless I open it up. The vendor probably won't want it back, but
they might, so I won't touch it until I hear from them.
Mike
Hi,
On 03/05/2016 10:45 PM, [email protected] wrote:
I got the replacement MTI 260-0624-D OCXO today.
It rattles!
I've seen that on one oscillator. I did a RMA and complained about the
maracas mode, which I had demonstrated to the rep. When it arrived they
wondered what that mean and the rep just smiled and ask them to pick it
up... and it rattle. Turns out that the way they soldered their ovens,
drops of solder could form and get loose, so they changed the process.
Unfortunatly, it is also the failure mode of rough shipping/handling for
some oscillators.
Cheers,
Magnus
I didn't even bother trying to power it up. Not much point. I have not taken
it apart, but have notified the seller. I may disassemble this one as well,
depending on what the seller says.
Mike
I just received a 5Mhz OCXO from eBay (MTI 260-0624-D OCXO). After testing it,
it is clear that it is defective.
1. It never heats up.
2. The reference voltage is zero.
3. Only noise is seen on the output pin.
I tested with a 12.54V, 2A supply voltage with around 30mV noise. That should
be sufficient to test.
All I was looking for was a 5Mhz signal whose frequency changed when the
adjustment pin was either tied to ground or the reference voltage. Never got
that far because I never go a signal at all.
The seller packed it well and shipped it promptly. I will see how he handles
it.
Mike
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