[time-nuts] MTI 260-0624-D OCXO

[Magnus Danielson]

Hi,

On 03/05/2016 10:45 PM, timenut at metachaos.net 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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>
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