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

Tom Knox actast at hotmail.com
Wed Nov 14 05:41:20 UTC 2012


Hi Edgardo;
I have been looking for a part number and source. There was a part number posted but it was for the 34401A which is slightly different. I will post price and availability if I find them.
Best Wishes;
Thomas Knox



> From: xe1xus at amsat.org
> Date: Tue, 13 Nov 2012 21:37:08 -0600
> To: time-nuts at febo.com
> Subject: Re: [time-nuts] HP-53132A Faded and flickering display
> 
> 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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