I have seen a few Datron units with flickering or unstable displays that came 
up perfect when the display power supply electrolytic was replaced.

Regards,

Laurence Motteram

-----Original Message-----
From: volt-nuts-boun...@febo.com [mailto:volt-nuts-boun...@febo.com] On Behalf 
Of ed breya
Sent: Wednesday, 19 December 2012 4:21 AM
To: volt-nuts@febo.com
Subject: Re: [volt-nuts] Datron 4000 DC/I/R Standard

That seems like a nice piece of equipment if it works or is easily repairable. 
Why do you assume the displays are broken? If they used gas discharge displays, 
they would likely be Nixie or Panaplex type, which are pretty durable, and are 
still common enough to not be a problem with procurement. There is also plenty 
of data out there about these items and their drivers. The most common failures 
I have seen in these types of displays are bad digit drive transistors, and 
sometimes bad segment drive ICs - the tubes themselves usually don't just crap 
out, but gradually darken or fade out.

I don't know about the manuals, but if you do locate one in pdf form, please 
share it if possible - it's nice to have access to that info for reference 
material even without owning one of the units.

Ed


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