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

Bob Camp lists at rtty.us
Fri Jun 8 20:36:01 EDT 2012


HI

I suspect it's the same part then. I doubt they were using two vastly different Rb's on the same card.

Bob

On Jun 8, 2012, at 5:34 PM, Joseph Gray wrote:

> This one has no SMA and hasn't been modded in any way that I can tell.
> It came on a cutoff circuit board, like the others.
> 
> Joe Gray
> W5JG
> 
> On Fri, Jun 8, 2012 at 3:29 PM, Bob Camp <lists at rtty.us> wrote:
>> 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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>> 
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