[time-nuts] Different or defective FE-5680A?

[Bob Camp]

Hi

There is a variant that comes from the factory with no 10 MHz output at all. Industrious people in far away places drill holes and wire up SMA connectors to give them a 10 MHz output. If yours is one of those, the mod may not have been 100% effective. Maybe a loose wire ….

Bob

On Jun 8, 2012, at 5:21 PM, Joseph Gray wrote:

> Further information. I do get a Lock (low) indication on pin-3 and a
> PPS on pin-6. Nothing at all on pin-7.
> 
> Joe Gray
> W5JG
> 
> On Fri, Jun 8, 2012 at 1:41 PM, Joseph Gray <jgray at zianet.com> wrote:
>> Months ago, I ordered two FE-5680A units from nichgeek for my personal
>> use. They work just fine. Recently, I ordered one for work from the
>> same source.
>> 
>> For the work unit, I ordered a small 15 VDC switcher and a 5 V DC-DC
>> module from Jameco. Today, I wired it all up, using the same pinout as
>> the previous units that I bought from nichegeek. Although the unit
>> gets warm, I get no 10 MHz output at all on pin 7.
>> 
>> I double checked my wiring and it is OK. I even went home and got one
>> of my units. Plugging my home unit in place of the work unit, mine
>> puts out a nice 10 MHz in short order.
>> 
>> Looking closer, I see that the two units are labeled differently. Mine
>> has a large white label that says "P/N 217400-30352-1".  On the
>> smaller label "FE-5680A  UN 78082" and "S/N 0434-84673". The work unit
>> is silkscreened with "PN: FE-5680A". The small label says "FE-5680A
>> UN37915 REVISION: B" and "S/N 0226-53954".
>> 
>> I know that there are several versions of FE-5680A, with different
>> pinouts. I'm wondering if this latest unit is different than the two I
>> purchased before.
>> 
>> I've emailed nichegeek and am awaiting a reply.
>> 
>> Joe Gray
>> W5JG
> 
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