[time-nuts] HP-53132A Faded and flickering display

[Bob Camp]

Hi

If you go shopping for a parts donor, a 53181 is probably going to be much cheaper. Most of the parts that burn out are common between the models.

Bob

On Nov 13, 2012, at 10:37 PM, Edgardo Molina <xe1xus at amsat.org> wrote:

> Dear Azelio, Tom, John and Luciano ( I hope I am not missing anybody),
> 
> Thank you all of you for your kind advise on this subject. I am sorry I was unable to reply in a timely manner. I had to leave town for a week for new IT business. I think I will start by dismantling the unit display and test the tantalum capacitors as you mentioned. If I can achieve success by doing this it is fine. Otherwise I could consider using it as the GPIB workhorse as I just started to obtain my first ADEV, MDEV and TDEV graphs with TimeLab and a Prologix adapter. May I know the command for turning the display off via the GPIB port? That is something nice for long periods of sampling. 
> 
> A whole new world has just opened to me. Know I am starting to get intimate with my frequency standards by knowing them in deep. If all goes well I should start updating my wish list for a Wavecrest DTS unit next year. For now I will squeeze every single Tau value from the graphs using the 53132A.
> 
> Last but not least. If the display fades away I could eventually consider buying a new one as the whole instrument is in pristine condition and would be a shame to see it working without a brilliant display. 
> Thank you for all your feedback.
> 
> Wishing you all a pleasant evening/morning.
> 
> 
> Kind regards,
> 
> 
> 
> Edgardo Molina
> Dirección IPTEL
> 
> www.iptel.net.mx
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> On Nov 4, 2012, at 8:27 AM, Timeok <timeok at timeok.it> wrote:
> 
>> Hi all,
>> 
>> to avoid more display "consumption" during long acquisitions, there is an HPIB command to blank the display on the counter. I have asked to KE5FX to add this feature in Timelab during the acquisition setup. Hope he have time to do this.
>> 
>> Luciano
>> 
>> 
>> 
>> Il 2012-11-02 23:13 John Lofgren ha scritto:
>>> <- snip ->
>>> 
>>> Two possibilities: Cathode poisoning or bad tantalum caps.  I'm not
>>> sure if "cathode poisoning" is really the correct term for this
>>> effect, but it's similar.  There have been a number of tutorials out
>>> there about rejuvenating VF displays.
>>> 
>>> <- snip ->
>>> 
>>> It appears that the military parts system has the EL displays listed
>>> for replacement purposes.
>>> http://www.wbparts.com/rfq/5980-01-396-4645.html
>>> http://www.iso-group.com/Public/PartDetail/CP3033A/12619547/12619547.aspx
>>> 
>>> Should the display prove to be beyond recovery it might be possible
>>> to buy a new one.  Now, the cost may be another matter ...
>>> 
>>> These are made by Noritake-Itron.  The generic part number is
>>> CP3033A, but it does not show up in their product line on their web
>>> site.  It might be worth contacting them to see if there's any
>>> possibility of still getting them.
>>> http://www.noritake-elec.com/contact_us.htm
>>> 
>>> Searching for Itron CP3033A turns up some parts brokers that claim to
>>> have access to 251 of them.
>>> 
>>> -John
>>> 
>>> 
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>> 
>> -- 
>> timeok
>> 
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