[time-nuts] 2 out of 3 bad 5680As?

[Rob Kimberley]

I completely agree with you on this tactic. I started my working life as a
bench technician with Systron Donner testing new and customer instruments.
There would always be that odd "dog" unit that you couldn't fix. Hey ho, put
on one side for a couple of days and get on with the others. 99 times out of
a 100 when you came back to it the fault was literally staring you in the
face.
 
Happy days!

Rob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Bob Camp
Sent: 28 February 2012 17:15
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] 2 out of 3 bad 5680As?

Hi

It's amazing how often the key element in any troubleshooting procedure is -
stop, put everything down, take a deep breath, get a cup of coffee, think
about it for a while. I've seen people go for weeks without executing this
very important step.

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Dave hartzell
Sent: Tuesday, February 28, 2012 12:43 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] 2 out of 3 bad 5680As?

Bill,

Yes, +5v....  but I was doing it incorrectly (bad hookup wire on both
units).  I haven't checked the second "bad" unit, but it will probably work
now too.

Sometimes I have to hit the "send" button before I find my errors.

Thanks for the thoughts,

Dave

On Mon, Feb 27, 2012 at 10:31 PM, WB6BNQ <wb6bnq at cox.net> wrote:
> Hi Dave,
>
> A silly question, although you did not indicate, you are supplying a
separate 5
> volts to the unit are you not ?
>
> Bill....WB6BNQ
>
>
> Dave hartzell wrote:
>
>> Hello,
>>
>> I have two units that don't produce any output and the lock pin 
>> floats around +2.3 volts continuously.  The +15v load starts at about 
>> 1.8A and drops down to about 0.7A on both units, but I never get a 
>> +5V or 0V on the lock or a 10MHz out signal.  (I'm not using an LED 
>> on the lock pin, just a high-impedance DVM.)
>>
>> I'm relatively confident in my connection setup, since I do have one 
>> unit that works "as advertised".  In fact, one of the bad units was a 
>> replacement from nichegeek, received about three weeks after the 
>> original first order of two units (from Amazon.com instead of China).
>>
>> Sorry if this is covered somewhere, but I couldn't find my symptoms 
>> on the list...  any thoughts are appreciated.
>>
>> Thanks,
>>
>> Dave
>>
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