[time-nuts] pts 160 power problem

Don Henderickx wa9ylp at sandprairie.net
Tue Mar 15 01:48:55 UTC 2011


On 3/14/2011 11:00 AM, Dave Mallery wrote:
> hi
>
> having finally acquired a stiff supply, i
>
> put in the requested 5.4vdc and the unit draws the specified 1.5a..
>
> still not working, no output signal, so back to the manual.
>
> dave
>
> On Fri, Feb 25, 2011 at 6:59 PM, EB4APL<eb4apl at cembreros.jazztel.es>  wrote:
>
>> Hi,
>>
>> Since this thread is about a PTS repair, I think this is not too much OT.
>>   I need the manual for my PTS 040, I already have one for the 160 from
>> Didier's site and while both models are similar end employ most the same
>> modules, I would like to have the specific one for my model.
>> According to PTS web site this model is still on production, but I think
>> that asking PTS for one would cost me much more than I paid for the real
>> thing.
>>
>> If anybody knows were I can get one I'll appreciate very much.
>>
>> Regards,
>> Ignacio, EB4APL
>>
>>
>>
>> El 26/02/2011 0:27, J. Forster wrote:
>>
>>> That depends on the phase of the moon and your religion.
>>>
>>> Sometimes low-ESR aluminum; other times good Tantalums (150D or CS-13s)
>>>
>>> No two people agree on this issue.
>>>
>>> -John
>>>
>>> ==============
>>>
>>>
>>>   thanks everyone.
>>>> i found a cache of tantalum caps in the output amp module.  also, there
>>>> isn't any output any more.
>>>> struggling to get all those @#@ screws out so i can get to them.
>>>>
>>>> should i find new tantalum caps, or is there a better substitute?
>>>>
>>>> dave
>>>>
>>>> On Fri, Feb 25, 2011 at 11:29 AM,<GandalfG8 at aol.com>   wrote:
>>>>
>>>>   In a message dated<25%2F02%2F2011%2017>25/02/2011 17:13:01 GMT
>>>>> Standard Time,
>>>>> dave.mallery at gmail.com writes:
>>>>>
>>>>> i tried  another more robust 5v supply, but that goes to 4.5v and ng
>>>>> output.
>>>>>
>>>>> i  removed each of the plug-in decades, one at a time, looking for the
>>>>> guilty
>>>>> one.  no joy.  i also removed the left rear module (uses  5v).  the
>>>>> other
>>>>> two
>>>>> modules only use 12v. which is fine.
>>>>>
>>>>> has  anyone been here before?  could it be a problem in the backplane (a
>>>>> work
>>>>> of art, btw)?
>>>>>
>>>>>
>>>>>
>>>>> ---------------
>>>>> Hi Dave
>>>>>
>>>>>
>>>>> I've used quite a few of these and have never yet experienced an  actual
>>>>> component failure, obviously not saying it can't happen just that  once
>>>>> sorted
>>>>> yours should remain pretty reliable.
>>>>>
>>>>>
>>>>> As John already suggested I'd also look for possible fautly tantalums or
>>>>> other capacitors across the supply but would also suggest removing all
>>>>> the
>>>>> modules from the motherboard at the same time before proceeding any
>>>>> furter
>>>>> and checking if the symptoms still persist.
>>>>> I know what you've done has probably eliminated the modules but it
>>>>> would
>>>>> be a shame to tear into the backplane if you just happened to have more
>>>>>   than
>>>>> one faulty module.
>>>>>
>>>>> I did once receive a previously working PTS160 by post that refused to
>>>>> play
>>>>>   and eventually located a very small solder blob, presumably  from
>>>>> inside
>>>>> the associated module, that had dropped into an edge  connector and
>>>>> wedged
>>>>> between a couple of pins, that was fun:-)
>>>>>
>>>>> If you haven't already found it there's a manual for the PT160 on
>>>>> Didier's
>>>>> site.........
>>>>>
>>>>> _http://www.ko4bb.com/cgi-bin/manuals.pl?dir=05%29_GPS_Timing/PTS_
>>>>> (http://www.ko4bb.com/cgi-bin/manuals.pl?dir=05)_GPS_Timing/PTS)
>>>>>
>>>>> regards
>>>>>
>>>>> Nigel
>>>>> GM8PZR
>>>>>
>>>>> _______________________________________________
>>>>> time-nuts mailing list -- time-nuts at febo.com
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>>>>> and follow the instructions there.
>>>>>
>>>>>
>>>> --
>>>> Dave Mallery, K5EN                 (ubuntu linux 10.10)
>>>> HC31 Box 99E;                   Williamsburg,  NM  87942
>>>>
>>>> no gates...
>>>>    no windows!
>>>>      free at last!
>>>>        linux counter #64628 (since 1997)
>>>>
>>>> "People aren't as dumb as Microsoft needs them to be."
>>>> --PJ, May 2007
>>>> _______________________________________________
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>>>>
>>>>
>>>> Hi:
Just a thought. I have not run my pts 160 for some time but I recall 
that it would loose output if run unterminated for any length of time 
mine is a 50 ohm imp output I think there were some  75 ohm also. If 
left off for a short time and then terminated it 's output would return 
and continue.
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>
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