Datron voltage reference PCB module pics.

[lowimpedance]

Here are some pictures of a Datron voltage reference PCB module which plugs onto another plug in card in an old 4800 series calibrator (the calibrator has had a fiery death and is now spare parts for 'other' still operational units!!).
I have removed the plastic covers which ,(also have foam installed too), keep air currents off the LTZ1000.
To note also the pcb is only 0.6mm thick.

After searching around I could not find any pics of this module before posting these, so excuse me if it allready has been posted somewhere else.
Also looking at it it would seem to follow the Datron schematic posted in the LTZ1000 thread.

[TiN]

Poor thing cooked itself up. Thanks for posting!

[pelule]

Great posting. I guess its the first time.

[Macbeth]

Excellent! I've seen that swastika cutout design a few times before.

[crispy_tofu]

Very cool, thanks for sharing! 

[HighVoltage]

Thanks for these pictures.
Is that PCB with its 0.6 mm still standard FR4?

[Andreas]

Hello,

also a big thumbs up from my side.
Especially the bottom side pictures is something that I have not seen before.

With best regards

Andreas

[lowimpedance]

Poor thing cooked itself up. Thanks for posting!

The 'browned' area of the PCB substrate is in the heater supply circuit. (this area overheating is consistant in 2 other sample 4800's Ive seen)
As for the fiery end, the high voltage output amps BBQ'd themselves.
Another consistant failure which most likely caused the' cascade' BBQ was the main supply PCB electro's drying out, (only mains linear too), allowing excessive ripple into places it should not be!!.

note to any 4800 series owners , servive the power PCB's with new electrolytics asap. and make sure the fan air flow is not impeded in any way!!.

Thanks for these pictures.
Is that PCB with its 0.6 mm still standard FR4?

It certainly has all the appearance of just being standard FR4., ie  no different in any way to the other PCB material used in the calibrator.